2001•Unpublished venueRequires access

Study on color Reaction of Cd (II) with New Reagent 2. 6-Dihydoxybendioazoaminoazo benzene and Its Application

Guo Yon

Abstract

The synthesis of a new reagent HHDAA and its chromogenic reaction with cadmium (Ⅱ)in the presence of TtitonX-100have been studied. In 1.0mol·1-1 ammonia solution Cd(Ⅱ ) reacts with HHDAA to form a stable red complex with molar ratio of 1:3. The apparent molar absorptivity is 1. 97 × 105L mol -1 cm-1. at the maximum absorption wavelength of 520nm. Beer's law is obeyed in the concentration range of 0-18μgCd(Ⅱ ) in 25ml solution. The method shows higher selectivity, 70μgHg (Ⅱ ) are tolerable and has been applied satisfactorily to determine cadmium derectly in waste water samples.

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Key concepts: Molar absorptivity, Reagent, Chromogenic, Cadmium, Chemistry, Color reaction, Absorption (acoustics), Selectivity