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2012•Chinese Journal of Analysis LaboratoryRequires access

Synthesis of 4-(4-Methyl-2-Nitrophenyldiazo)amino-4′-chloroazobenzene and its colour reaction with Mercury(II)

DU Jing-jing

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Abstract

A new reagent 4-(-4-methy-2-nitrophenyldiazo)-4'-nitroazobenzene(abbreviated as MNDACB below) was synthesized,and its colour reaction with Hg(Ⅱ) was studied.In the presence of Triton X-100,Hg(Ⅱ) reacts with MNDACB to form a red complex in a medium of Na2B4O7-NaOH buffer of pH11.0.The apparent molar absorptivity is 1.45×105 L·mol-1·cm-1 at the maximum absorption of 495 nm,and Beer's Law is obeyed in the concentration range of 0~0.8μg/mL for Hg(Ⅱ).The method is simple,and it has high sensitivity.It has been applied to the determination of trace amounts of Hg(Ⅱ) directly in waste water with satisfactory results.

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A new reagent 4-(-4-methy-2-nitrophenyldiazo)-4'-nitroazobenzene(abbreviated as MNDACB below) was synthesized,and its colour reaction with Hg(Ⅱ) was studied.In the presence of Triton X-100,Hg(Ⅱ) reacts with MNDACB to form a red complex in a medium of Na2B4O7-NaOH buffer of pH11.0.The apparent molar absorptivity is 1.45×105 L·mol-1·cm-1 at the maximum absorption of 495 nm,and Beer's Law is obeyed in the concentration range of 0~0.8μg/mL for Hg(Ⅱ).The method is simple,and it has high sensitivity.It has been applied to the determination of trace amounts of Hg(Ⅱ) directly in waste water with satisfactory results.

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Available abstract

A new reagent 4-(-4-methy-2-nitrophenyldiazo)-4'-nitroazobenzene(abbreviated as MNDACB below) was synthesized,and its colour reaction with Hg(Ⅱ) was studied.In the presence of Triton X-100,Hg(Ⅱ) reacts with MNDACB to form a red complex in a medium of Na2B4O7-NaOH buffer of pH11.0.The apparent molar absorptivity is 1.45×105 L·mol-1·cm-1 at the maximum absorption of 495 nm,and Beer's Law is obeyed in the concentration range of 0~0.8μg/mL for Hg(Ⅱ).The method is simple,and it has high sensitivity.It has been applied to the determination of trace amounts of Hg(Ⅱ) directly in waste water with satisfactory results.

Key concepts: Chemistry, Molar absorptivity, Reagent, Mercury (programming language), Color reaction, Trace Amounts, Nuclear chemistry, Analytical Chemistry (journal)

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Synthesis of 4-(4-Methyl-2-Nitrophenyldiazo)amino-4′-chloroazobenzene and its colour reaction with Mercury(II) — Research Paper | ScholarLens