Summary
A new procedure for the quantitative determination of Cu, Co, Ni and Cd has been described. It is based on the precipitation of the metals as pyridine thiocyanate complexes and titrating the excess thiocyanate with ceric sulphate using dead stop end point method or the usual visual end point method with vigorous stirring.
Zusammenfassung
Ein neues Verfahren zur Bestimmung von Kupfer, Kobalt, Nickel und Cadmium beruht auf der Fällung der Metalle als Pyridinthiocyanatkomplex und Rücktitration überschüssigen Thiocyanats mit Cer(IV)-sulfat. Der Endpunkt kann nach der Dead stop-Methode oder visuell bestimmt werden.
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References
Deshmukh, G. S., u. A. L. J. Rao: Z. analyt. Chem. 185, 376 (1962).
Foulk, C. W., and A. T. Bawden: J. Amer. chem. Soc. 48, 2045 (1926); cf. Z. analyt. Chem. 86, 260 (1931).
Prodinger, W.: Organic reagents used in quantitative inorganic analysis, pp. 155. Elsevier Publ. Co. Inc., 1940.
Vogel, A. I.: A text book of quantitative inorganic analysis, p. 256, Longmans, Green & Co., London 1955.
Willard, H. H., and P. Young: J. Amer. chem. Soc. 50, 1322 (1928); cf. Z. analyt. Chem. 84, 451 (1931).
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See also Z. analyt. Chem. 185, 376 (1962).
Authors thanks are due to Prof. G. B. Singh for the facilities provided during the above work. The award of a fellowship by U.G.C. to one of us (A.L.J.R.) is also acknowledged.
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Deshmukh, G.S., Rao, A.L.J. Cerimetric determination of metals forming pyridine thiocyanate complexes. Z. Anal. Chem. 194, 101–103 (1963). https://doi.org/10.1007/BF00505195
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DOI: https://doi.org/10.1007/BF00505195