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  • Spektralphotometrie  (29)
  • man
  • pheromone
  • Springer  (48)
  • American Association for the Advancement of Science
  • Cambridge University Press
  • 1975-1979  (48)
  • 1978  (48)
Collection
Keywords
Publisher
  • Springer  (48)
  • American Association for the Advancement of Science
  • Cambridge University Press
Years
  • 1975-1979  (48)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Reduction of absorption of digoxin, phenytoin and aspirin by activated charcoal in man (1978)
    Springer
    European journal of clinical pharmacology 13 (1978), S. 213-218 
    Details
    ISSN: 1432-1041
    Keywords: Activated charcoal ; acute intoxication ; digoxin ; phenytoin ; aspirin ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The inhibitory effect of activated charcoal 50 g suspended in water on the absorption of digoxin, phenytoin and aspirin was studied in six healthy volunteers in a cross-over manner. The absorption of digoxin and phenytoin were almost completely prevented (about 98%) when activated charcoal was ingested immediately after the drug. The total absorption of aspirin was inhibited by 70%, with clear postponement of absorption and partial release of aspirin from the charcoal in the gut: The peak serum concentration of aspirin was reduced by 95% by charcoal. When activated charcoal was ingested 1 hour after the drugs the inhibition of absorption was considerably less. However, since the absorption of larger doses of the drugs is often slow, the administration of an adequate dose of activated charcoal will be of definite value in the treatment of acute intoxication, even if delayed for several hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00609985
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  • 2
    Electronic Resource
    Electronic Resource
    Compensation of dietary induced reduction of tetracycline absorption by simultaneous administration of EDTA (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 129-131 
    Details
    ISSN: 1432-1041
    Keywords: Tetracycline absorption ; EDTA ; milk ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The absorption of tetracycline in man under the influence of concomitantly administered EDTA, milk and a combination of EDTA and milk has been investigated. Urinary excretion of the drug was measured for 30 h. The inhibitory effect of milk could be counteracted by simultaneous ingestion of EDTA, which resulted in almost equivalent urinary excretion of tetracycline compared to experiments done in the fasting state. Administration of EDTA alone, in a neutral dosage form, did not significantly change absorption of the drug, which contradicted previous findings. The possible use of EDTA during tetracycline therapy is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00607444
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  • 3
    Electronic Resource
    Electronic Resource
    Modification of the pharmacokinetics of doxycycline in man by ferrous sulphate or charcoal (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 277-280 
    Details
    ISSN: 1432-1041
    Keywords: Doxycycline ; iron ; charcoal ; enteral cycling ; man ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In order to study the intestinal interactions of doxycycline (DC) with Fe++ and charcoal, two groups of healthy volunteers were given either 200 mg or 100 mg DC in capsules at 2 p. m. and 9 p. m., and blood samples for fluorimetric assay of DC were collected for 24 h starting at 8.30 a. m. on the following morning. A 24-h-urine was also collected. The test was subsequently repeated at one-week intervals, when the volunteers also ingested either ferrous sulphate (80 mg Fe++) or charcoal (4.0 g) immediately after the zero-time sample of DC and at 3, 8 and 12 h. Charcoal completely adsorbed DC in vitro in an artificial small intestinal fluid. Ferrous sulphate or charcoal did not modify the serum level or urinary excretion of DC after the 200 mg+200 mg dose, but ferrous sulphate did reduce the 24-h urinary excretion of DC after the 100 mg+100 mg dose. The serum half-life and AUC of DC were reduced by ferrous sulphate given after the 100 mg+100 mg dose of DC. Charcoal did not modify any parameter, even after the 100 mg+100 mg dose of DC. The results do not support existence of important enteral cycling of DC. Although oral ferrous sulphate can lower the serum level and shorten the serum half-life of DC, the acute experiment suggested that a therapeutic serum level of DC can be maintained despite treatment with iron in the doses used in iron-deficiency, and charcoal in the doses used in diarrhoeic states, if the drugs are administered several hours apart.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00560462
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  • 4
    Electronic Resource
    Electronic Resource
    Preliminary studies of the kinetics of citalopram in man (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 69-73 
    Details
    ISSN: 1432-1041
    Keywords: Citalopram ; pharmacokinetics ; man ; steady state levels ; metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The plasma concentrations of citalopram, a potent serotonin reuptake inhibitor, and its demethylated metabolite have been determined by a specific fluorescence coupling technique during single dose experiments in volunteers and in clinical tests. Citalopram was found to have linear kinetics within the dose range investigated, which were characterized by fairly rapid absorption and slow elimination (biological half-life 1–21/2 days). Steady state levels in the range 120–340 nM (i.e. slightly above those associated with pharmacodynamic activity in animals) were attained within a week. A drug/metabolite ratio of 2–3 was recorded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00560260
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  • 5
    Electronic Resource
    Electronic Resource
    Investigation into the species-specific deacylation of penta-acetyl-gitoxin (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 425-430 
    Details
    ISSN: 1432-1041
    Keywords: Penta-acetyl-gitoxin ; 16-acetyl-gitoxin ; gitoxin ; mass spectrometry ; species-specific deacylation ; man ; rabbit ; guinea-pig ; rat ; blood ; intestinal mucosa ; liver homogenate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Penta-acetyl-gitoxin (PAG) shows species-specific deacylation to 16-acetyl-gitoxin (16-AG; I and III) or gitoxin (II and IV) by homogenates of liver and intestinal mucosa of man (I), rabbit (II), guinea-pig (III) and rat (IV), whereas it is degraded into tri- and tetra-acetates by homogenates of guinea-pig myocardium as well as by human blood and serum. The identity of the principal and chloroform-extractable metabolites in human urine after PAG administration with 16-AG has been demonstrated by mass spectrometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716384
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  • 6
    Electronic Resource
    Electronic Resource
    Haemodynamic and tolerance studies in man of a new, orally active, selectiveβ 1-adrenoceptor agonist H 80/62 (1978)
    Springer
    European journal of clinical pharmacology 13 (1978), S. 163-170 
    Details
    ISSN: 1432-1041
    Keywords: H 80/62 ; haemodynamic effects ; noninvasive techniques ; selectivity ; β1-adrenoceptor agonist ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The selective β1-adrenoceptor agonist H 80/62 was administered intravenously and orally to healthy subjects and its effects on systolic time intervals, arterial blood pressure and heart rate were studied. Side-effects were noted too, and continuous ECG-recordings were made in order to study its arrhythmogenic effect. After i.v. administration of H 80/62 20 µg/kg body weight there was shortening of total electromechanical systole, the pre-ejection period and of the left ventricular ejection time, systolic blood pressure tended to increase, and diastolic blood pressure and heart rate were essentially unchanged. When administered orally as a sustained-release preparation in doses between 20 and 40 mg the haemodynamic effects were qualitatively the same as after i.v. administration, but in some studies there was a slight increase in heart rate. During exercise the systolic blood pressure and heart rate were identical after H 80/62 and placebo. The effect of the drug was maximal immediately after cessation of the i.v. infusion and basal values were regained within 60 min. After oral administration of a sustained-release formulation the effect was maximal after one hour and persisted for at least five to seven hours. The drug was well tolerated on repeated administration. The incidence of ventricular extrasystoles was possibly increased in one subject out of eight (11 ventricular extrasystoles during 18 h). The results of this Phase I study of H 80/62 warrant further evaluation of the drug in man.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00609978
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of delayed administration of activated charcoal on nortriptyline absorption (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 445-447 
    Details
    ISSN: 1432-1041
    Keywords: Activated charcoal ; tricyclic antidepressants ; nortriptyline ; poisoning ; antidote ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Activated charcoal is known to reduce the absorption of therapeutic doses of nortriptyline in vivo when administered 30 min after drug ingestion. In a group of volunteers, one sachet (10 g) of a new activated charcoal preparation, ‘Medicoal’ was found to produce a highly significant reduction in nortriptyline absorption when given as long as four hours after nortriptyline dosing. Activated charchoal may therefore be useful in the treatment of tricyclic antide-pressant poisoning even if a delay of several hours ensues before medical help is sought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716388
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  • 8
    Electronic Resource
    Electronic Resource
    Serum and plasma concentrations of clindamycin following a single intramuscular injection of clindamycin phosphate in maintenance haemodialysis patients and normal subjects (1978)
    Springer
    European journal of clinical pharmacology 14 (1978), S. 435-439 
    Details
    ISSN: 1432-1041
    Keywords: Intramuscular Clindamycin Phosphate ; serum levels ; half-lives ; renal Failure ; haemodialysis ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Serum levels of clindamycin bioactivity and total clindamycin were studied after single intramuscular injections of 300 mg of clindamycin phosphate in a group of 6 normal subjects and a group of 6 maintenance haemodialysis patients. The patients were studied during a non-dialysis period and then again during haemodialysis. Peak levels tended to be higher and elimination half-lives shorter in the patients than in the normal subjects. Possible reasons for these differences are discussed. There was no evidence that haemodialysis per se influenced the pharmacokinetics of clindamycin phosphate. The proportion of unhydrolysed clindamycin phosphate tended to be higher in the renal failure patients and the reason for this is not apparent. Little, if any, dosage modification is necessary in severe renal failure although there is probably little point in exceeding a dose of 300 mg intramuscularly every 8 h even in severe infections in patients with severe renal failure. The higher peak levels in patients with advanced renal failure indicate the need for further studies with repeated doses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716386
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  • 9
    Electronic Resource
    Electronic Resource
    Bioavailability of norethindrone in human subjects (1978)
    Springer
    European journal of clinical pharmacology 13 (1978), S. 35-39 
    Details
    ISSN: 1432-1041
    Keywords: Norethindrone ; bioavailability ; man ; competitive protein binding ; sex differences ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary A competitive protein binding assay for norethindrone was developed to measure plasma levels in human subjects. The plasma levels were considerably higher in women than in men, especially at low dose levels. The plasma levels were directly related to the dose in men; but greater variations in the plasma levels were observed in women. The plasma half-life was about 5 h in both sexes with single oral doses of 5 to 20 mg. A comparative bioavailability study with norethindrone from 2 different manufacturers, formulated in the same manner, showed no significant differences in absorption characteristics and provided sufficient data for pharmacokinetic analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00606680
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  • 10
    Electronic Resource
    Electronic Resource
    Diel and age-dependent behavioral patterns of exposure-concealment in three species ofTrogoderma (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 409-423 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Dermestidae ; diel behavioral patterns ; 14-methyl-8-hexadecenal ; pheromone ; reproductive isolation ; Trogoderma glabrum ; T. inclusum ; T. variabile ; trogodermal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract AdultTrogoderma glabrum, T. inclusum, andT. variabile exhibit diel periods of exposure-concealment behavior, the frequency and duration of which are age-dependent, and the temporal placement of which is species-dependent. Exposure periods correspond with daily maxima in male sensitivity to the most active female-released sex pheromone component, 14-methyl-8-hexadecenal, and with respective periods of sex pheromone release in females. Exposure-concealment behavior may be a factor in reproductive isolation between these species, since potential communication distances are greatly reduced when either males or females are concealed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00989498
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  • 11
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of vitamin D2 (calciferol) by reaction with HCl and tetrachloroethane (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 416-416 
    Details
    ISSN: 1618-2650
    Keywords: Best von Vitamin D2 ; Spektralphotometrie ; HCl, Tetrachloräthan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00471467
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  • 12
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of picric acid with zinc and ammonium chloride (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 416-416 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Pikrinsäure ; Spektralphotometrie ; Zink und Ammoniumchlorid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00471468
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  • 13
    Electronic Resource
    Electronic Resource
    Optimierung der spektralphotometrischen Uran(VI)-Bestimmung mit Arsenazo III in starksauren Lösungen (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 43-44 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Uran(VI) mit Arsenazo III ; Spektralphotometrie ; starksaure Lösung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481329
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  • 14
    Electronic Resource
    Electronic Resource
    Spektralphotometrische Bestimmung von Thallium(I)- und Dimethylthalliumverbindungen in geringen Konzentrationen (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 46-47 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Thallium(I), Dimethylthalliumverbindungen ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481332
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  • 15
    Electronic Resource
    Electronic Resource
    Über die analoge on-line-Differentiation höherer Ordnung zur Feinauflösung von UV-Visible-Spektren und anderen elektrischen Meßsignalen (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 233-235 
    Details
    ISSN: 1618-2650
    Keywords: Spektralphotometrie ; Ableitungen höherer Ordnung, Analogdifferenzierer, Derivativverfahren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird über eine neu entwickelte Analog-Recheneinheit berichtet, mit der man Ableitungen von Spektren und anderen Meßsignalen erstmalig bis zur 7. Ordnung on-line verwirklichen kann. Wie die Prüfungen ergaben, ist die optimale Auflösung in den meisten Fällen mit der 4. Ableitung erreicht. Dann sind nämlich alle Schultern und Wendepunkte der Kurven in bipolare Signale übergeführt. Eine Aufstellung der wichtigsten bisherigen Anwendungsgebiete wird gegeben.
    Notes: Summary This report deals with a newly developed analogue computing accessory by which derivations of spectra and other electric signals up to the seventh order were realized on-line. A thorough study of this apparatus showed that in most cases fine-resolving is reached by the fourth derivation. In this case, all shoulders and points of inflections are resolved to bipolar signals. A number of examples for applying derivative spectrophotometry of higher order (DSHO-method) is also given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00491814
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  • 16
    Electronic Resource
    Electronic Resource
    Application of the orthogonal functions to spectrophotometric analysis (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 400-402 
    Details
    ISSN: 1618-2650
    Keywords: Bestimmung von Meclozin, Pyridoxin in pharmazeutischen Produkten ; Spektralphotometrie ; Orthogonalfunktion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A rapid spectrophotometric method for the analysis of tablets containing the title compounds without preliminary separation is developed. Thus, pyridoxine is determined by measurement at λ max while the six-points quadratic orthogonal polynomial has been used to determine meclozine. The mean percentage recoveries (8 determinations) were found to be 101.71±0.64 and 99.77±0.62% (P=0.05) for meclozine and pyridoxine hydrochlorides, respectively. Neither the Vierordt's nor the absorbance ratio methods gave accurate results as the proposed method. The method was applied successfully to the analysis of market preparations.
    Notes: Zusammenfassung Es wurde ein Verfahren zur schnellen Bestimmung der beiden Verbindungen ohne Vortrennung ausgearbeitet. Pyridoxin wird durch Messung beim Absorptionsmaximum von 292 nm bestimmt, Meclozin wird mit Hilfe eines quadratischen Sechspunkte-Orthogonalpolynoms berechnet. Die Wiederfindungsrate (8 Bestimmungen) lag bei 101,71±0,64 bzw. 99,77±0,62% (P=0,05). Vergleichsbestimmungen nach der Methode von Vierordt und dem Verfahren der Extinktionsverhältnisse gaben weniger genaue Resultate. Die vorgeschlagene Methode wurde mit gutem Erfolg auf handelsübliche Präparate angewendet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481561
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  • 17
    Electronic Resource
    Electronic Resource
    BTM, TBTM und SBTM-Reagentien für photometrische Bestimmungsverfahren — aus 4(6)-Amino-2-chalkogeno-uracilen (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 220-221 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Magnesium ; Spektralphotometrie ; Trimethin-Reagentien aus Aminochalkogenuracilen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bekanntlich werden Trimethinfarbstoffe, als Reagentien für die photometrische Magnesiumbestimmung, durch die Kondensation von Malonaldehyd und Barbitursäure bzw. ihren Derivaten hergestellt. Auf ähnliche Weise erhält man mit 4(6)-Amino(2)-chalkogeno-uracilen und Malonaldehyd die Ammoniumsalze der Trimethinfarbstoffe, die sich ohne weitere Aufarbeitung als Reagentien für die photometrische Bestimmung einsetzen lassen. Die Herstellung der Verbindungen wird beschrieben.
    Notes: Summary It is known that trimethine dyes used for the photometrie determination of magnesium ions can be prepared by the condensation of malonicaldehyde with barbituric acid or its derivatives; In a similar way it is possible to use 4(6)-amino-2-chalcogeno-uracils giving with malonicaldehyde ammonium salts of the trimethine dyes, which are suited for the photometric determination without further manipulations. The preparation is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00491051
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  • 18
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    Electronic Resource
    2-carboxy-2′-hydroxy-3′,5′-dimethylazobenzene-4-sulphonic acid (CHDMAS) as a spectrophotometric reagent for the simultaneous determination of nickel(II) and cobalt(II) (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 304-304 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Nickel, Kobalt mit 2-Carboxy-2′-hydroxy-3′,5′-dimethylazobenzol-4-sulfonsäure ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00491333
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  • 19
    Electronic Resource
    Electronic Resource
    Photometric determination of some aromatic aldehydes with barbituric acid and of barbituric acid with p-dimethylaminobenzaldehyde (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 302-303 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Aldehyden, aromat. mit Barbitursäure ; Spektralphotometrie. Best. von Barbitursäure mit p-Dimethylaminobenzaldehyd ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493705
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  • 20
    Electronic Resource
    Electronic Resource
    Schnelle Bestimmung von Uranspuren in Wasser und Meerwasser (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 359-361 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Uran in Wasser ; Spektralphotometrie ; Arsenazo, Fällg. mit Al-Phosphat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Zur schnellen und genauen Bestimmung von Uranspuren in natürlichen, auch salzhaltigen Wässern, wird Uran durch Spurenfällung mit Aluminiumphosphat abgetrennt. Durch Auflösen des mit Zinkpulver vermengten Niederschlages erfolgt Reduktion zu U(IV), das mit Arsenazo III bestimmt wird. Der Extinktionskoeffizient beträgt 97000 cm2/Mol.
    Notes: Summary For the precise and accurate determination of uranium in natural, even saline, waters, it is separated by coprecipitation with Al-phosphate. The precipitate is mixed with zinc powder, dissolved and thus reduced to U(IV), which is determined with Arsenazo III. The molar absorptivity is 97000 cm2/mol.
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    URL: http://dx.doi.org/10.1007/BF00481551
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  • 21
    Electronic Resource
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    A new method for separation and spectrophotometric determination of phosphate ion by the liquid-liquid extraction with benzophenone at an elevated temperature (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 23-24 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Phosphat neben Silicium, Arsen, Germanium ; Spektralphotometrie ; Extraktion mit Benzophenon, Molybdatmethode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A new type of separation of phosphate ion, along with its spectrophotometric determination, was established by liquid-liquid extraction, where the yellow heteropoly acid formed by the reaction with ammonium molybdate in acid solution is quantitatively extracted into molten benzophenone at a temperature of about 60° C. When cooled down to room temperature, the benzophenone extract converts from the liquid state to the solid state. The resulting solidified extract is dissolved in methyl propionate, and the phosphate ion in the solvent is determined spectrophotometrically by the blue heteropoly acid method. Possible interference by Si, As and Ge is eliminated by the separation procedure.
    Notes: Zusammenfassung Bei dem beschriebenen Verfahren wird die mit Ammoniummolybdat in saurer Lösung gebildete gelbe Heteropolysäure bei 60° C in geschmolzenes Benzophenon extrahiert. Dieses wird durch Abkühlen verfestigt, in Methylpropionat gelöst und in dieser Lösung das Phosphat spektralphotometrisch als blaue Heteropolysäure bestimmt. Si, As und Ge, die ebenfalls mit Molybdat reagieren, werden durch die Extraktion abgetrennt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481995
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  • 22
    Electronic Resource
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    Deterrence of repeated oviposition by fruit-marking pheromone inCeratitis capitata (Diptera: Tephritidae) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 55-63 
    Details
    ISSN: 1573-1561
    Keywords: pheromone ; Ceratitis capitata ; oviposition deterrent ; laboratory insect quality ; Tephritidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract During ovipositor dragging on the fruit surface following egg laying in hawthorne fruit,Ceratitis capitata (Wiedemann) females deposit an unidentified pheromone that deters repeated oviposition attempts in that fruit. The pheromone proved water soluble and, when collected and sprayed in aqueous solution onto uninfested fruits in laboratory cages, effectively deterred boring attempts byC. capitata females of wild origin for at least 6 days (termination of test). A laboratory population ofC. capitata cultured on artificial media for more than 200 generations deposited pheromone that proved equally as deterrent to wild fly oviposition as pheromone from wild flies. However, lab fly oviposition was not effectively deterred by the presence of pheromone. The ecological significance of the pheromone is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988260
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    Mating stimulant pheromone and cuticular lipid constituents ofFannia femoralis (Stein) (Diptera: Muscidae) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 83-93 
    Details
    ISSN: 1573-1561
    Keywords: Fannia femoralis (Stein) ; pheromone ; mating stimulant pheromone ; (Z)-11-hentriacontene ; cuticular lipid ; fly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The cuticular lipids of male and femaleFannia femoralis were similar for recently emerged insects but soon began to develop chromatographic patterns characteristic of each sex. Mature females contained more C31 and C33 monoolefin in the cuticular lipid than males. Also, the double bonds in the monoolefins of the female lipid were situated predominantly at the eleventh and thirteenth carbons, while most of those from the males were centrally located in the molecule or at the ninth carbon. The female C31 monoolefin stimulated copulation by the males, but more mating activity occurred when the saturated hydrocarbons present in the female cuticular lipids were added. The synthetic monoolefin most active as a mating stimulant pheromone was (Z)-11-hentriacontene, but the addition of female alkanes or of syntheticn-alkanes to (Z)-11-hentriacontene increased the activity of the synthetic pheromone.
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    URL: http://dx.doi.org/10.1007/BF00988263
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    Pentatomid natural products (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 161-172 
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    ISSN: 1573-1561
    Keywords: Pentatomidae ; Heteroptera ; Asopinae ; sex attractant ; pheromone ; (E)-2-hexenal ; α-terpineol ; benzyl alcohol ; exocrine glands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In addition to the primarily defensive metathoracic glands, adult Pentatomoidea possess a pair of active exocrine glands that open between the III and IV abdominal tergites. In the southern green stink bug,Nezara viridula, and other phytophagous species examined, the glands are small (〈 10 μg secretion/individual) and of approximately equal size in both sexes. In some, but not all, of the predaceous pentatomids (Asopinae), the III-IV dorsal abdominal glands are small in females (〈 10 μg secretion/individual) and extremely large in males (〉500 μg secretion/individual). Using a GC-MS system, the secretion from both males and females ofN. viridula (Pentatominae) was found to contain (E)-2-hexenal, hexanal, 1-hexanol, andn-tridecane. Females contained about three times moren-tridecane than males. The capacious glands ofPodisus maculiventris (Asopinae) males produce (E)-2-hexenal, benzyl alcohol, α-terpineol, linalool, terpinen-4-ol, andcis-piperitol. The composition of the previously unanalyzed secretions from the adult III-IV dorsal abdominal glands is compared and contrasted to that of secretions from the metathoricic gland, and the role of coexisting exocrine glands in adult Heteroptera is discussed.
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    URL: http://dx.doi.org/10.1007/BF00988052
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    Heliothis virescens: Attraction of males to blends of (Z)-9-tetradecen-1-ol formate and (Z)-9-tetradecenal (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 709-716 
    Details
    ISSN: 1573-1561
    Keywords: Tobacco budworm ; Heliothis virescens (F.) ; virelure ; pheromone ; sex attractant ; (Z)-9-tetradecen-1-ol formate ; (Z)-7-dodecen-1-ol formate ; (Z)-11-hexadecenal ; (Z)-9-tetradecenal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In field trapping experiments, 16∶1 and 32∶1 blends of (Z)-9-tetradecen-1-ol formate (Z-9-TDF) and (Z)-9-tetradecenal (Z-9-TDAL) caught as manyHeliothis virescens (F.) as 3 virgin females and virelure, the synthetic pheromone of this species [a 16∶1 mixture of (Z)-11-hexadecenal (Z-11-HDAL) and (Z)-9-tetradecenal]. Z-9-TDF and (Z)-7-dodecen-1-ol formate (Z-7-DDF) are structurally similar to Z-11-HDAL and Z-9-TDAL, respectively. The sensory input elicited by Z-9-TDF appears to substitute for the sensory input of Z-1 1-HDAL. In contrast, Z-7-DDF had no significant effect on catches of maleH. virescens when used alone, in combination with either Z-11-HDAL or Z-9-TDF as a bait in traps, or as a disruptant of pheromone communication via permeation of the atmosphere. Furthermore, Z-9-TDF may be a more stable and economical attractant forH, virescens males than is Z-1 1-HDAL.
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    URL: http://dx.doi.org/10.1007/BF00990281
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    Mating stimulant pheromone and cuticular lipid constituents ofFannia pusio (Wiedemann) (Diptera: Muscidae) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 73-81 
    Details
    ISSN: 1573-1561
    Keywords: Fannia pusio (Wiedemann) ; pheromone ; mating stimulant pheromone ; (Z)-11-hentriacontene ; cuticular lipid ; fly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chromatograms of the cuticular lipids washed from newly emerged male and femaleFannia pusio were nearly identical. By the time the flies were 1 day old, the chromatographic profiles for the sexes were different. Mature females contained more C31- and C33-hydrocarbons than the males. The double bonds of the female monoolefins were mostly at the eleventh and thirteenth carbons, but those of the males were predominantly at the ninth carbon. Most active in stimulating copulation by males were the unbranched monoolefins with 31 and 33 carbons from the females. When they were synthesized and tested, the most active compound was (Z)-11-hentriacontene.
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    Identification of the California red scale sex pheromone (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 211-224 
    Details
    ISSN: 1573-1561
    Keywords: California red scale ; Aonidiella aurantii ; pheromone ; attractant ; enantiomer ; isomers (E,Z)-3-methyl-6-isopropenyl-9-decen-1-yl acetate ; (Z)-3-methyl-6-isopropenyl-3,9-decadien-1-yl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Pheromone components of female California red scale,Aonidiella aurantii (Maskell) were isolated from airborne collections and found to be 3-methyl-6-isopropenyl-9-decen-1-yl acetate and (Z)-3-methyl-6-isopropenyl-3,9-decadien-1-yl acetate. Both enantiomers of the latter compound as well as the corresponding enantiomers of theE isomer were prepared from (S)- or (R)-carvone. Bioassays with each of the four isomers showed that only theR,Z isomer attracted male red scale.
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    Patterns of sex pheromone release from adult females, and effects of air velocity and pheromone release rates on theoretical communication distances inTrogoderma glabrutm (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 395-408 
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    ISSN: 1573-1561
    Keywords: Coleoptera ; chemical communication distances ; Dermestidae ; 14-methyl-8-hexadecenal ; pheromone ; release rates ; Trogoderma glabrum ; trogodermal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract By means of olfactory communication models, theoretical maximum communication distances for dispensers releasing synthetic (E)-14-methyl-8-hexadecenal (trogodermal) were confirmed in windtunnel tests withTrogoderma glabrum males. Pheromone release rates ofT. glabrum females are at least 104 greater during than before calling, and are gradually reduced after calling. The models predict that, even under ideal conditions, females may attract males from only several meters. The models are used to estimate active space lengths for female and synthetic pheromone sources, as a function of realistic release rates and wind velocities.
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    URL: http://dx.doi.org/10.1007/BF00989497
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    Behavioral responses of the female eastern spruce budwormChoristoneura fumiferana (Lepidoptera, Tortricidae) to the sex pheromone of her own species (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 649-655 
    Details
    ISSN: 1573-1561
    Keywords: Spruce budworm ; Choristoneura fumiferana ; pheromone ; female behavior ; electroantennogram ; dispersal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Female eastern spruce budworm moths respond to the synthetic sex pheromone of their own species (a mixture ofcis- andtrans-11-tetradecenal) by walking, antennal grooming, flexation of the body, extension of the ovipositors, and oviposition. The sex pheromone is perceived by receptors on the antennae. Electroantennogram responses from the female are approximately two-thirds the amplitude of those obtained from males.
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    Heterocyclic compounds as releasers of the fright reaction in the giant danioDanio malabaricus (Jerdon) (Cyprinidae, Ostariophysi, Pisces) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 665-673 
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    ISSN: 1573-1561
    Keywords: Fish ; Danio malabaricus (Jerdon) ; fright reaction ; pheromone ; heterocyclic compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Fifty-nine pteridine, purine, and pyrimidine derivatives were tested with schools of the giant danioDanio malabaricus (Jerdon). The fright reaction was elicited by three pteridine derivatives: 2,6-diamino-4-oxodihydropteridine, isoxanthopterin, and 6-acetonyliso-xanthopterin. A minor effect could not be excluded for three purine derivatives: I-5-MP, IDP, and ITP.
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    Substituierte 1,5-Diphenyl-3-phenylcarbamoylformazane als photometrische Reagentien für Palladium (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 115-117 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Palladium(II) mit Formazanen ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die o-Cl-substituierten Formazane-I und -II werden erstmalig dargestellt und ihre Eignung als photometrische Reagentien für Palladium überprüft. Formazan-I reagiert nur im Dioxan-WasserGemisch bei pH 3,5 zu einem grünen 1∶2-Pd-Komplex, während Formazan-II einen wasserlöslichen Komplex bildet, mit maximaler Absorption bei pH 3 (λmax= 633 nm, ɛ623=11.5·1031 Mol−1 cm−1 Das Beersche Gesetz ist im Bereich von 0,02–11 μg Pd/ml erfüllt.
    Notes: Summary The o-Cl substituted formazans I und II where newly synthesized and their application to the spectrophotometric determination of palladium has been evaluated. Formazan I reacts only in dioxanwater medium at pH 3.5 resulting in a green 1∶2 Pd-complex, whereas formazan II forms a water-soluble complex with maximum absorption at pH 3 (λmax= 633 nm, ɛ623=11.5×1031 Mol−1 cm−1). This system obeys Beer's law from 0.02–11 μg Pd/ml.
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    Verfahren zur photometrischen Bestimmung N-monosubstituierter Carbamate (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 29-33 
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    ISSN: 1618-2650
    Keywords: Best. von Carbamaten, N-monosubstitutierte ; Spektralphotometrie ; Fearon-Reaktion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung N-Monosubstituierte Carbamate werden mit 1,3-Diaminopropan in Gegenwart geringer Mengen Natriumhydroxid zu einem Harnstoffderivat umgesetzt, das seinerseits mit Hilfe der „Carbamid-Reaktion“ nach Fearon bestimmt wird. Die Erfassungsgrenze liegt für N-Methylcarbamate im Bereich von 20 nmol. Im Falle der N-Methylcarbamate ließ sich das Harnstoff-Zwischenprodukt als N-Methyl-N′-(3-aminopropyl)-harnstoff identifizieren; diese Substanz entsteht bei der Amidierung in nahezu quantitativer Ausbeute.
    Notes: Summary N-Monosubstituted carbamates are converted to urea derivates by reaction with 1,3-diaminopropane in the presence of small amounts of sodium hydroxide. The urea derivatives are determined by Fearon's “carbamide reaction”. The detection limit for N-methylcarbamates is in the range of 20 nmoles. In the case of N-methylcarbamates, N-methyl-N′-(3-aminopropyl)-urea was found to be the intermediate urea derivative, which is formed in nearly quantitative yield.
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    Spectrophotometric determination of titanium with salicylic acid (1978)
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    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 299-299 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Titan ; Spektralphotometrie ; Salicylsäure als Reagens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00493701
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    A general method for the spectrophotometric determination of aromatic aldehydes (1978)
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    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 282-284 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Aromat. Aldehyden mit Diphenylamin ; Spektralphotometrie ; allg. Verfahren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Aromatic aldehydes and some of their binary mixtures can be determined spectrophotometrically with diphenylamine in the presence of hydrochloric acid. Errors are in the range of 6–10%. Various other organic compounds do not interfere.
    Notes: Zusammenfassung Aromatische Aldehyde und einige ihrer binären Gemische können mit Diphenylamin in salzsaurer Lösung spektralphotometrisch bestimmt werden. Fehler sind im Bereich von 6–10%. Eine große Zahl anderer organischer Verbindungen stört nicht.
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    Bestimmung einiger Derivate der Ameisensäure (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 289 (1978), S. 285-285 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Ameisensäurederivaten ; Spektralphotometrie ; Decarbonylierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00440213
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    Spectrophotometric determination of tungsten with salicylic acid (1978)
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    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 47-47 
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    ISSN: 1618-2650
    Keywords: Best. von Wolfram ; Spektralphotometrie ; SalicylsÄure als Reagens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00468865
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    Bestimmung von Plasma-Kallikrein mit einem chromogenen Peptid-Substrat: Methodik und klinische Anwendung (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 104-105 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Kallikrein in Plasma ; Spektralphotometrie ; chromogenes Peptidsubstrat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482268
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    Mehrwellenlängenuntersuchungen in Titrationssystemen (VIS-UV) (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 116-117 
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    ISSN: 1618-2650
    Keywords: Best. von Säure-Base-Gleichgewichten ; Spektralphotometrie ; Mehrwellenlängen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482279
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    Untersuchung von Molekülstrukturen in Lösung durch spektrometrische Titrationen (VIS-UV-Absorption, -Fluorescenz, CD/ORD, NMR) (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 117-118 
    Details
    ISSN: 1618-2650
    Keywords: Spektralphotometrie ; Spektrometrische Titration ; Molekülstruktur ; Lösung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482280
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    Kinetische Mehrwellenlängen-Analyse mittels konventioneller und Stopped-flow-Spektrometrie (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 118-119 
    Details
    ISSN: 1618-2650
    Keywords: Kinetische Analyse ; Spektralphotometrie ; Mehrwellenlängen ; Stopped-flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482281
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    A new principle of measurement in a centrifugal analyzer: Absorbance measurement in cuvettes lying longitudinally to the light beam (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 126-127 
    Details
    ISSN: 1618-2650
    Keywords: Spektralphotometrie ; Zentrifugalanalysator, Küvetten längs zum Lichtstrahl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482287
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    Proteolytische Enzyme im Liquor bei Contusionen, Tumoren, entzündlichen und degenerativen Erkrankungen des Gehirns und der Meningen: erste Befunde (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 177-178 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Proteolytischen Enzymen, Arylamidasen in Liquor ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482333
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    Kinetischer Test zur Bestimmung der Serumlipase-Aktivität auf einem Zentrifugalanalysator (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 174-175 
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    ISSN: 1618-2650
    Keywords: Best. von Lipase in Serum ; Spektralphotometrie ; Zentrifugalanalysator
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482330
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    Direct spectrophotometric and specific quantitative determination of free and bound d-xylose by analytical application of a new enzyme, d-xylose: NADP-oxidoreductase (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 179-180 
    Details
    ISSN: 1618-2650
    Keywords: Best. von D-Xylose ; Spektralphotometrie ; Xylose-NADP-oxidoreductase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00482334
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    Automatische photometrische Fluorid-Titration mit Thoriumnitrat und Alizarin S (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 286-289 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Fluorid mit Thoriumnitrat ; Spektralphotometrie ; Alizarin S als Indicator, automatisch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Für Fluoridgehalte zwischen 1 und 20 mg in 85 ml Lösung wurde die photometrische Titration mit Thoriumnitrat und Alizarin S automatisiert und die Arbeitsbedingungen optimiert. Ausgewählte Matrixeinflüsse werden eingehender untersucht. Dieses Verfahren ist besonders für die Bestimmung von Fluorid aus Peroxid-Aufschlüssen geeignet.
    Notes: Summary The photometric titration of fluoride with thorium nitrate and Alizarin S as indicator has been automated and optimized for fluoride levels between 1 and 20 mg/85 ml solution. The interference of several ions has been investigated. This procedure is particularly useful for the determination of fluoride after fusion with peroxides as fluxing agents.
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    Spektralphotometrische Bestimmung von aliphatischen primären Aminen (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 411-412 
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    ISSN: 1618-2650
    Keywords: Best. von Aminen, aliphat, primär ; Spektralphotometrie ; o-Phthaldialdehyd und Mercaptoäthanol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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    URL: http://dx.doi.org/10.1007/BF00471463
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    Pyrohydrolysis for the rapid determination of chlorine traces in silicate and non-silicate minerals and rocks (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 293-295 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Chlorid in Mineralien, Gesteinen ; Spektralphotometrie ; Pyrohydrolyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary This simple method for the determination of chloride takes a total time of 15 min. Samples are mixed with silica in the ratio 1∶1, and the chloride is liberated in an induction furnace by pyrohydrolysis within ca. 10 min. The chloride is collected in a 0.020 M sodium-hydroxide solution. This solution is filled up to 200 ml with twice distilled water and absorption is measured with ferric ammonium sulphate and mercury(II) thiocyanate solution by a Zeiss Elko II photometer. Analysis of three international reference samples show excellent accuracy with a standard deviation of less than 4% (e.g. for a chloride content of 117 ppm in Andesite AGV-1).
    Notes: Zusammenfassung Diese einfache Methode zur Bestimmung des Chloridions benötigt eine Gesamtzeit von 15 min. Die Proben wurden mit Kieselsäure im Verhältnis 1∶1 vermischt und in einem Induktionsofen 10 min lang pyrohydrolysiert. Das entstandene HCl wurde in einer 0,020 M Nariumhydroxidlösung aufgefangen. Diese Lösung wurde mit zweifach dest. Wasser auf 200 ml aufgefüllt, mit Eisenammoniumsulfat- und Quecksilberthiocyanatlösung versetzt und deren Absorption mit einem Zeiss-Elko II-Photometer gemessen. Die Analysen von 3 internationalen Referenzproben zeigen eine hohe Präzision mit einer relativen Standardabweichung von weniger als 4% (z. B. für einen Gehalt von 117 ppm Chlor in Andesit AGV-1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493699
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  • 48
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of saccharin in soft drinks using chlorophenothiazine as reagent (1978)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 292 (1978), S. 413-413 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Saccharin in Getränken, Limonaden (Fruchtsäften) ; Spektralphotometrie ; Chlorophenothiazin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481567
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