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  • 1960-1964  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 183 (1961), S. 172-177 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Amperometric ascorbimetric determinations of cerium(IV) and ferric iron have been carried out at 50°C with two polarized electrodes at 200 and 100 mV respectively. The results obtained are fairly accurate and precise within ±1.0 per cent. A simple method for successive determination of cerium and iron has been developed; and conditions for such estimations have been established. At an acidity of 2.5 M with respect to sulphuric acid, it is possible to ward off the reduction of ferric iron and thereby cerium(IV) is successfully titrated with ascorbic acid in this medium. After completion of the reaction and then lowering the acid concentration to pH 1.5 with aid of ammonium hydroxide, FeIII is titrated with standard ascorbic acid yielding good results.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 321 (1963), S. 81-84 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zirkon wurde durch potentiometrische acidimetrische Titration der bei der Umsetzung seines Hydroxids mit KF freiwerdenden Hydroxidionen bestimmt. Zur Titanbestimmung eignet sich diese Methode nicht. Be, Al, La, Th und Kationen der II. Gruppe stören, während Cr, Ni, Co, Zn und Mu selbst in größerer Menge ohne Einfluß auf die Genauigkeit sind. Diese Methode ist schnell, einfach und ergibt befriedigende Ergebnisse.
    Notes: The potentiometric acidimetric determination of zirconium is based on the interaction between its hydroxide and KF yielding hydroxide ions which are determined with standard HCl as titrant. This method is not suitable for the estimation of titanium. The presence of Be, Al, La, Th and second group cations interfere. However, the presence of Cr, Ni, Co, Zn and Mn even in larger quantities does not affect the accuracy of the results. The method is quick, simple, specific and yields satisfactory results.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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