2010•Journal of Shanxi Datong UniversityRequires access

Synthesis of 1-(4,5-dimethoxy-2-benzoicacid)-3-(4-nitrophenyl)-triazene(DMBANPT) and its Color Reaction with Cadmium(II)

Liqiang Hao

Abstract

A new reagent 1-(4,5-dimethoxy-2-benzoicacid)-3-(4-nitrophenyl)-triazene(DMBANPT) has been synthesized and the color reaction of DMBANPT with Cadmium(Ⅱ) has been studied.At the presence of Triton X-100,the reagent reacts with Cadmium(Ⅱ) to form a red complex with the molar ratio of 3:1 in pH 9.2 NH3-NH4Cl buffer solution.The maximum absorbtion of the complex is at 530 nm,and the apperent molar absorbtivity is 1.96 ×105 L /(mol.cm.) Beer's law was obeyed in the range of 0~10 μg/25 mL for Cadmium(Ⅱ).The method has been applied to determine cadmium(Ⅱ) in waste water with satisfactory results.

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Key concepts: Triazene, Cadmium, Reagent, Color reaction, Chemistry, Molar ratio, Nuclear chemistry, Buffer solution