Studies on the Colour-Producing Reactions of Alkaline Earth Metals with Polyhalogcnated Bisazo Derivatives of Chromotropic Acid Containing-PO3H2

Chem. J. Chinese Universities ›› 1990, Vol. 11 ›› Issue (5): 526.

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Studies on the Colour-Producing Reactions of Alkaline Earth Metals with Polyhalogcnated Bisazo Derivatives of Chromotropic Acid Containing-PO₃H₂

Zhao Yeping¹, Ren Ying¹, Yu Ximao²

1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun;
2. Department of Chemistry, Wuhan University, Wuhan

Received:1988-11-14 Online:1990-05-24 Published:1990-05-24

Abstract

Abstract: The title reagents can form colour complexes with alkaline earth metal. In this paper, the absorption spectrum, the optimum ranges of acidity, the sensitivity and selectivity for the colour reactions of these reagents with alkaline earth metal as well as the composition of complexes were studied. Both Chlorophosphouazo-TB and Chlorophosphouazo-DBC are excellent Chromogenic reagents in the spectrophotametuc determination of strontium, barium and calcium.

Key words: Alkaline earth metal, Polyhalogenated chlorophosphonazo, Colour reaction

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Zhao Yeping, Ren Ying, Yu Ximao. Studies on the Colour-Producing Reactions of Alkaline Earth Metals with Polyhalogcnated Bisazo Derivatives of Chromotropic Acid Containing-PO₃H₂[J]. Chem. J. Chinese Universities, 1990, 11(5): 526.

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Studies on the Colour-Producing Reactions of Alkaline Earth Metals with Polyhalogcnated Bisazo Derivatives of Chromotropic Acid Containing-PO₃H₂

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