A new catalytic determination of copper (II) by means of the oxidative coupling reaction of p-hydrazinobenzenesulfonic acid with m-phenylenediamine.

S Nakano, H Enoki, T Kawashima

Index: Nakano, Shigenori; Enoki, Hitomi; Kawashima, Takuji Chemistry Letters, 1980 , p. 1173 - 1176

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Citation Number: 8

Abstract

A new sensitive catalytic method for the determination of copper (II) is proposed. In the presence of hydrogen peroxide, copper (II) catalyzes the oxidation of p- hydrazinobenzenesulfonic acid to p-sulfobenzenediazonium ion, which is coupled with m- phenylenediamine to form a yellow azo dye (λ max= 454 nm). By means of this catalytic reaction, nanogram amounts of copper (II) can be determined easily.