ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Keywords
Publisher
Years
  • 11
    Electronic Resource
    Electronic Resource
    Flame emission inhibition titration procedure for the determination of traces of titanium
    Amsterdam : Elsevier
    Analytica Chimica Acta 129 (1981), S. 259-261 
    Details
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0003-2670(01)84141-6
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Determination of cadmium in indium phosphide by electrothermal atomic absorption spectrometry and ion-selective electrode potentiometry (1997)
    Springer
    Fresenius' journal of analytical chemistry 359 (1997), S. 533-537 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract  Two independent methods for the determination of cadmium in cadmium-doped indium phosphide have been developed. Electrothermal atomic absorption spectrometry (ETAAS) utilized both platform atomization and a chemical modifier composed of magnesium nitrate and orthophosphoric acid. As the matrix mass was found to influence the cadmium sensitivity, matrix matched calibration standards were necessary. The detection limit (3sB) is 0.20 μg/g for a 100 mg sample. The electrochemical method employed a solid-state cadmium sulfide-silver sulfide electrode as potentiometric sensor. An excess of indium (III) influenced the electrode response. A preliminary chelation-extraction of indium with acetylacetone at pH 5.0 in acetate buffer overcame the interference. The detection limit of the ISE-potentiometric method is 10 μg/g for a 200 mg sample. Two indium phosphide single crystals grown from melts doped with cadmium sulfide or cadmium telluride were analyzed for their cadmium content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050627
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Determination of zinc in gallium arsenide by electrothermal atomic absorption spectrometry with the L'vov platform and matrix modification (1988)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 330 (1988), S. 506-509 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method is described for the determination of zinc in gallium arsenide by ETAAS with platform atomization and matrix modification. The sample is decomposed with nitric and hydrochloric acids, ortho-phosphoric acid is added as a matrix modifier and the diluted solution is injected into the furnace. The optical correction of the nonspecific absorbance is readily achieved by means of a conventional deuterium lamp. Platform atomization improves the peak repeatability by a factor often in comparison with wall atomization. For a 40 mg sample, with reduced argon flow rate in the atomization step, the detection limit is 0.08 μg Zn g−1 (4×1015 atoms cm−3). Results obtained by analysing Zn-doped GaAs samples are presented. The relative standard deviation of the overall procedure is 4–8%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00490758
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Platform atomization in the electrothermal AAS determination of magnesium in gallium arsenide (1987)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 328 (1987), S. 64-67 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An ET-AAS method using platform atomization is proposed for the determination of magnesium in gallium arsenide. The sample is decomposed with nitric and hydrochloric acids and the diluted solution is injected into the furnace. No significant interferences from the matrix up to 4.0 mg GaAs ml−1 were observed by using the proposed procedure. The detection limit (3 σ) is 0.12 μg Mg g−1 in GaAs. Improvements should be achieved by a better control of contamination sources. Results obtained by analysing undoped GaAs samples are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00560950
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    Atomic-absorption determination of copper impurities in zirconium salts using an air-acetylene flame (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 299 (1979), S. 261-263 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Kupfer in Zirkoniumsalzen ; Spektralphotometrie, Atomabsorption ; HF-Zusatz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary An AAS method is described for the direct determination of traces of copper in zirconium(IV) oxide chloride and nitrate. An interference study of the zirconium matrix is reported. Best conditions for the removal of the suppressive effect of zirconium on the copper signal by addition of hydrofluoric acid are described. Results obtained by analyzing commercial samples from different manufacturers are presented.
    Notes: Zusammenfassung Kupferverunreinigungen wurden in Zirkoniumoxidchlorid und -nitrat bestimmt. Störungen durch die Matrix wurden untersucht. Die abschwächende Wirkung des Zr auf das Cu-Signal wurde durch Zusatz von Fluorwasserstoffsäure beseitigt. Analysenergebnisse für verschiedene handelsübliche Zr-Salze werden mitgeteilt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00488413
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    The use of a cupric ion-selective electrode as end-point detector in precipitation titration of oxalate (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 296 (1979), S. 149-151 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Oxalat ; Fällungstitration/Elektroden, ionenselektive ; Cu-Elektrode zur Endpunktsindikation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary It is demonstrated that oxalate can be titrated at pH 6–8 by employing lead(II) as titrant and a cupric ISE as end-point detector in the presence of traces of cupric ions. The response of the ISE to oxalate and E/pH plots have been examined. The method has been tested for the range of 0.8–40 mM oxalate. Recovery was found generally to be better than 98% and relative standard deviation was 0.4% at the 4 mM level. Interferences from carbonate, phosphate and arsenate can in part be overcome by adjusting the pH to 6.0±0.2.
    Notes: Zusammenfassung Es wird gezeigt, daß Oxalat bei pH 6–8 mit Blei(II)-Lösung in Gegenwart von Kupferionen titriert werden kann, wobei eine Kupfer-ionenselektive Elektrode zur Endpunktsindikation dient. Das Verfahren wurde im Bereich 0,8–40 mM Oxalat getestet und die Anzeigeempfindlichkeit untersucht. Die Wiederfmdensrate ist besser als 98%; die relative Standardabweichung beträgt 0,4% bei 4 mM Oxalat. Durch Einstellung des pH-Wertes auf 6,0±0,2 können Störungen durch Carbonat, Phosphat und Arsenat z.T. eliminiert werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495179
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    Atomic absorption spectrometric determination of indium in gallium arsenide (1989)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 334 (1989), S. 148-153 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The determination of indium in heavily doped gallium arsenide (0.2–1.2 mg g−1 In), by both electrothermal and flame AAS is reported. The sample is first decomposed with nitric acid and the diluted solution is atomized by employing the more convenient technique. The conventional air-acetylene flame is used for samples containing at least 1 mg g−1 indium. For lower concentrations the electrothermal atomization is required and matrix-matched standards become necessary. Platform sampling is shown to improve both sensitivity and repeatability in comparison with the tube-well sampling. Dependence of the matrix effect on both the signal measurement mode and deterioration of the platform is examined. By increasing the sample mass up to 100 mg, without further dilution of the solution to be injected into the furnace but with the optical correction of the background, a detection limit (6 s) of 4.2 ng g−1 (1.2×1014 atoms cm−3) is achieved. The method was applied to In doped GaAs samples and the results are compared with those independently obtained by differential pulse polarography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00476676
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 18
    Electronic Resource
    Electronic Resource
    Determination of traces of copper in silicon by AAS (1980)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 301 (1980), S. 309-309 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Kupfer in Silicium ; Spektalphotometrie. Atomabsorption ; Spuren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00491428
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 19
    Electronic Resource
    Electronic Resource
    Determination of vanadium by calcium atomization inhibition titration (1981)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 307 (1981), S. 411-411 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Vanadium ; Volumetrie, Spektralphotometrie ; Inhibitionstitration, Ca-Flamme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00480125
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 20
    Electronic Resource
    Electronic Resource
    Indirect atomic absorption spectrometric determination of silicon in gallium arsenide using an amplification reaction (1993)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 345 (1993), S. 575-578 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An indirect method is described for determining silicon in Si-doped gallium arsenide by electrothermal atomic absorption spectrometry using an amplification reaction. After sample decomposition, arsenic is removed by evaporation in the presence of hydrochloric acid, hydroxylammonium chloride and potassium bromide. Silicon is extracted into MIBK as silicomolybdic acid. The organic phase is injected into the graphite furnace and the molybdenum content is finally determined. The detection limit (6s) is 0.7 μg Si/g GaAs. The method has been applied to the analysis of some Si-doped samples. The RSD of the overall procedure is 5.9–14.8% in the range 1.4–2.7 μg/g.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325802
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...