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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 195 (1963), S. 255-256 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Cu2+, Ni2+, Cr3+, Bi3+, ZrO2+, Th4+, Pb2+ und Al3+ wurden bestimmt, indem man einen Überschuß an ÄDTA-Lösung zugab und mit Eisen(III)-chloridlösung zurücktitrierte. Als Indicator wurde 1-Hydroxy-2-naphthoesäure oder 2-Hydroxy-3-naphthoesäure verwendet. Es wurden gute Ergebnisse erzielt.
    Notes: Summary Cu2+, Ni2+, Cr3+, Bi3+, ZrO2+, Th4+, Pb2+ and Al3+ have been determined by adding an excess of EDTA solution and back titrating with ferric chloride solution, using 1-hydroxy-2-naphthoic or 2-hydroxy-3-naphthoic acid as indicator. Good results have been obtained.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 30 (1965), S. 149-154 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The interaction between iron (III) and 1-hydroxy 2-naphthoic acid in pH range 2-5 results in the production of deep blue colour, which exhibits absorption maximum at 620 mμ. The composition and stability of the complex responsible for the appearance of colour has been studied spectrophotometrically at different pH values. Application of JoB's methods, slope ratio method and mole ratio method indicated the formation of 1:1 complex. The stability constant (log k) at pH 2.90 and 3.92 corresponded to 4.20 and 3.90 respectively.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 323 (1963), S. 28-34 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammensetzung und Stabilität der aus Fe37+ und o-Kresotinsäure gebildeten blauvioletten Chelatverbindung wurden spektrophotometrisch bei αDmax = 550 mμ ermittelt. Es ist ein 1 : 1-Komplex, für dessen Beständigkeitskonstante bei 35,5°C und pH 1,93; 2,90 und 3,92 folgende Werte erhalten wurden: log k = 4,61; 4,15 bzw. 3,40.
    Notes: The formation of a bluish violet chelate between iron(III) and o-cresotic acid with absorption maximum at 550 mμ has been observed. The composition of the chelate has been determined spectrophotometrically using methods of continuous variation, slope ratio and mole-ratio; the ratio of iron(III) to o-cresotate corresponded to 1 : 1. These data were further utilised for the computation of stability constant (log k) at pH 1.93, 2.90 and 3.92, which at 35.5°C worked out to be 4.61, 4.15 and 3.40 respectively.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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