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  • 1
    Electronic Resource
    Electronic Resource
    Photometric determination of palladium with chrome azurol S (1963)
    Springer
    Microchimica acta 51 (1963), S. 993-995 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Palladium läßt sich mit Hilfe von Chromazurol S auf einfache Weise kolorimetrisch bestimmen. Die praktische Empfindlichkeit der Methode beträgt 0,4μg/cm2 bzw. 0,04μg/cm2 nachSandell. Die Arbeitsbedingungen und die durch Fremdionen verursachten Störungen werden angegeben.
    Abstract: Résumé Le chromazurol S permet un dosage colorimétrique simple du palladium, avec une sensibilité de 0,4μg/cm2 (en pratique) ou 0,04μg/cm2 (Sandell) respectivement. On décrit en détail les conditions opératoires et les interférences.
    Notes: Summary Chrome Azurol S permits a simple colorimetric determination of palladium with a sensitivity of 0.4μg/cm2 (practical) or 0.04μg/cm2 (Sandell), respectively. Conditions and interferences are described in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01217629
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  • 2
    Electronic Resource
    Electronic Resource
    Microdetermination of scandium, yttrium and lanthanum: Use of Chrome Azurol S as a chromogenic reagent (1968)
    Springer
    Microchimica acta 56 (1968), S. 899-902 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Arbeitsweise für die spektrophotometrische Bestimmung von So, Y und La mit Chromazurol S als Farbreagens wurde angegeben. Die Gültigkeit des Beerschen Gesetzes, die Stabilität der Chelate in Abhängigkeit vom Ph, die Empfindlichkeit der Reaktion und der Einfluß von Fremdionen wurden untersucht.
    Notes: Summary Optimum conditions for the spectrophotometric determination of scandium, yttrium and lanthanum using Chrome Azurol S as a chromogenic reagent are described. The studies include the determination of the range for adherence toBeer's law, pH range of stability of the chelates, sensitivity and the influence of foreign ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01221153
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  • 3
    Electronic Resource
    Electronic Resource
    Complexometric determination of rare earths in aqueous solution (1969)
    Springer
    Microchimica acta 57 (1969), S. 660-663 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die komplexometrische Bestimmung von Pr, Nd und Sm als typische Vertreter der Seltenen Erden mit Alizarinrot S, Thoron oder Murexid als chelatochrome Indikatoren wurde untersucht. Optimales pH-Bereich, Konzentrationsbereich und andere Parameter wurden geprüft.
    Notes: Summary Complexometric determinations of praseodymium, neodymium and samarium as representative members of the rare earths with Alizarin Red S, Thoron, and Murexide as ohelatochrome indicators have been investigated. The studies include the determination of optimum pH range, concentration range and other conditions required for the analysis of these metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216471
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  • 4
    Electronic Resource
    Electronic Resource
    Solvent extraction and spectrophotometric determination of uranium (VI) (1965)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 207 (1965), S. 256-259 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Uran kann durch Extraktion als Diäthyldithiocarbamidat mit Methyläthylketon von Ti, Zr, Th, La oder Ce getrennt werden. Der günstigste pH-Bereich liegt zwischen 2,0 und 3,5. Die Trennungen wurden mit folgenden Mengen durchgeführt: U (11,75–47,00 mg); Ti (4,78 bis 19,04 mg), Zr (9,12–36,48 mg) Th (116,0–460,0 mg), La (6,95–27,8 mg), Ce (7,06–28,24 mg). Folgende Ionen verursachen Störungen: CuII, FeIII, CoII, BiIII, NiII, CrVI, TeIV, SeIV, AgI, HgII, AsIII, SnIV, PbIV, CdII, MoVI, MnII, VVI, ZnII, InIII, TlI, WVI, OsVIII sowie NbV.
    Notes: Summary Solvent extraction of uranium-sodium diethyldithiocarbamate with ethylmethyl ketone and separation from titanium, zirconium, thorium, lanthanum and cerium has been described. It has been found that 11.75 to 47.00 mg of uranium can be extracted from a binary mixture containing 4.78 to 19.04 mg of titanium, 9.12 to 36.48 mg of zirconium, 116.0 to 460.0 mg of thorium, 6.95 to 27.8 mg of lanthanum or 7.06 to 28.24 mg of cerium at pH 3.0. The pH range between which the separations may be carried out successfully is 2.0 to 3.5. The following cations interfere in the separations: CuII, FeIII, CoII, BiIII, NiII, CrVI, TeIV, SeIV, AgI, HgII, AsIII, SnIV, PbIV, CdII, MoVI, MnII, VV, ZnII, InIII, TlI, WVI, OsVIII and NbV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00513971
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  • 5
    Electronic Resource
    Electronic Resource
    Spectrophotometric Studies on the chelate formation between uranium (VI) and I (o-arsonophenylazo) 2 naphthol 3:6 disulphonate (thoron) in aqueous solution (1963)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 20 (1963), S. 219-224 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The composition and stability of the chelate formed between uranyl ion (II) and 1 (o-arsonophenylazo) 2 naphthol 3:6 disulphonate (Thoron) have been investigated using spectrophotometric method. The chelate is red in colour and has λmax at 510mμ. The composition as determined by different methods is 1:1. The chelate is stable between pH 2.5 and 5.0. The values of log K as determined by two different methods are 4.2 ± 0.25 and 4.54 ± 0.15 respectively at pH 3.0 and at 25°.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19630200315
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  • 6
    Electronic Resource
    Electronic Resource
    Studies on the colloidal nature of 2-(p-sulphophenylazo)-1.8-dihydroxy naphthalene 3.6-disulphonic acid (SPANDS) in aqueous solution (1964)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 23 (1964), S. 104-107 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The nature of 2-(p-sulphophenylazo)-1.8 dihydroxy naphthalene 3.6-disulphonic acid (SPANDS) (in aqueous solution) as a colloidal electrolyte has been determined by the electrical conducance studies. The curve obtained by plotting the square root of concentration and the molar conductance was not linear and resembled that of colloidal electrolytes. The temperature of zero conductance as determined by extrapolation is -22.5°C. The temperature coefficient per degree centigrade per hundred of the conductance at 35°C is between 1.5 and 1.7.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19640230117
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  • 7
    Electronic Resource
    Electronic Resource
    The 1:2 Hafnium-Sodium Alizarin 3-Sulphonate Chelate (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 27 (1965), S. 113-116 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Formation of a 1:2 hafnium-Alizarin Red S chelate (Λmax520 mμ) has been described. The composition has been arrived at employing absorptiometric measurements using the mole and slope ratio methods. The value of stability constant (log K) as determined by the mole ratio method is 10.2. The system obeys Beer's law from 0.79 ppm. to 35.6 ppm. of hafnium between pH 1.0 and 2.5.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650270301
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  • 8
    Electronic Resource
    Electronic Resource
    Composition and Stability of Lead-Alizarin Red S Chelate (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 30 (1965), S. 60-62 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The composition and stability of the red coloured complex of lead-Alizarin Red S chelate (λmax490mμ) have been determined using the mole ratio method and the slope ratio method. The ratio of lead to Alizarin Red S has been determined to be 1:1. The chelate is stable between pH 5.4 and 8.2. The value of formation constant is 6.0. 104 at pH 4.0 at 25°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650300107
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  • 9
    Electronic Resource
    Electronic Resource
    The I:I Copper(II)-alizarin Red S Chelate in Aqueous Solution (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 30 (1965), S. 314-316 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Formation of a 1:1 pink coloured chelate (λmax 500mμ) between copper(II) and Alizarin Red S using the mole ratio and slope ratio methods by absorbance studies have been reported. The value of stability constant as determined by the mole ratio method is 4.5 × 105 at 25°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650300510
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  • 10
    Electronic Resource
    Electronic Resource
    Physico Chemical Studies on the Metal Chelates of Nitroso R salt, thoron, chromotrope 2 B and chrome azurol S in aqueous solution (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 68-75 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Composition and stability of palladium-Nitroso R Salt chelate, lanthanum, thorium, uranium and palladium chelates of Thoron, lanthanum-Chromotrope 2 B chelate and palladium-Chrome Azurol S chelate have been reported. The range of stability of the chelates with pH have also been determined. The use of Chrome Azurol S, Chromotrope 2 B, Murexide, Thoron, Quinizarin sulphonic acid, and gallocyanine in the complexometric determination of thorium against EDTA has also been reported.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310110
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