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Colour Reaction of Chromogenic Reagent 3,5-Di-bromine-2-pyridinediazoaminoazobenzene with Cadmium(II) and its Application

Meng Shuang, Pan Jiao

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Abstract

Synthesis of a new reagent 3,5 di bromine 2 pyridinediazoaminoazobenzene and its chromogenic reaction with cadmium(Ⅱ) ion was repored. In a weak alkaline medium, the reagent reacted with cadmium(Ⅱ) to form a 4∶1 red complex. The absorption maximum of the complex is at 526 nm and the apparent molar absorptivity is 2.04×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed for cadmium(Ⅱ) in the range of 0～15 μg/25 mL. This method was employed to determine trace amounts of cadmium(Ⅱ) in waste water.

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What this paper is about

Synthesis of a new reagent 3,5 di bromine 2 pyridinediazoaminoazobenzene and its chromogenic reaction with cadmium(Ⅱ) ion was repored. In a weak alkaline medium, the reagent reacted with cadmium(Ⅱ) to form a 4∶1 red complex. The absorption maximum of the complex is at 526 nm and the apparent molar absorptivity is 2.04×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed for cadmium(Ⅱ) in the range of 0～15 μg/25 mL. This method was employed to determine trace amounts of cadmium(Ⅱ) in waste water.

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Available abstract

Synthesis of a new reagent 3,5 di bromine 2 pyridinediazoaminoazobenzene and its chromogenic reaction with cadmium(Ⅱ) ion was repored. In a weak alkaline medium, the reagent reacted with cadmium(Ⅱ) to form a 4∶1 red complex. The absorption maximum of the complex is at 526 nm and the apparent molar absorptivity is 2.04×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed for cadmium(Ⅱ) in the range of 0～15 μg/25 mL. This method was employed to determine trace amounts of cadmium(Ⅱ) in waste water.

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

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Colour Reaction of Chromogenic Reagent 3,5-Di-bromine-2-pyridinediazoaminoazobenzene with Cadmium(II) and its Application — Research Paper | ScholarLens