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Spectrophotometric Determination of Mercury with p-chlorobenzenzene

Zhang Hong-zhi

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Abstract

The colour reaction of Hg (Ⅱ) with p-chlorobenzendiazoaminoazobenzene(p-CBDAA)was studied.The results show that in the presence of OP and pH 9.5 borax buffer solution the reagent reacts with Hg(Ⅱ) to form a orange-red stable complex with a molar ratio of 2∶1.The maximum absorption and apparent molar absorptivity is 530 nm and 1.20×10 5 L·mol -1 ·cm -1 *respectively.Beer's law is obeyed in the range if 0～0.8 μg/mL.This method has been applied to determination of mercury in tap water samples and button cell with satisfactory results.

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What this paper is about

The colour reaction of Hg (Ⅱ) with p-chlorobenzendiazoaminoazobenzene(p-CBDAA)was studied.The results show that in the presence of OP and pH 9.5 borax buffer solution the reagent reacts with Hg(Ⅱ) to form a orange-red stable complex with a molar ratio of 2∶1.The maximum absorption and apparent molar absorptivity is 530 nm and 1.20×10 5 L·mol -1 ·cm -1 *respectively.Beer's law is obeyed in the range if 0～0.8 μg/mL.This method has been applied to determination of mercury in tap water samples and button cell with satisfactory results.

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Available abstract

The colour reaction of Hg (Ⅱ) with p-chlorobenzendiazoaminoazobenzene(p-CBDAA)was studied.The results show that in the presence of OP and pH 9.5 borax buffer solution the reagent reacts with Hg(Ⅱ) to form a orange-red stable complex with a molar ratio of 2∶1.The maximum absorption and apparent molar absorptivity is 530 nm and 1.20×10 5 L·mol -1 ·cm -1 *respectively.Beer's law is obeyed in the range if 0～0.8 μg/mL.This method has been applied to determination of mercury in tap water samples and button cell with satisfactory results.

Key concepts: Molar absorptivity, Reagent, Chemistry, Mercury (programming language), Borax, Color reaction, Molar ratio, Buffer solution

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