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Synthesis of 1,3-di-[(4-nitrobenzenediazoa)]benzenetriazene and its colour reaction with mercury(II)

Wang Xiao-jin

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Abstract

A new reagent 1,3-di-[(4-nitrobenzenediazoa)]benzenetriazene(DNBDBT) was synthesized,and its colour reaction with Hg(Ⅱ) was studied in the presence of Triton X-100.The results showed that Hg(Ⅱ) reacts with DNBDBT to form a stable red complex in a medium of Na2B4O7-NaOH buffer solution at pH 10.0.The apparent molar absorptivity was 1.15×105 L·mol-1·cm-1 at the maximum absorption of 564 nm.Beer's law was obeyed in the concentration range of 0-0.6 μg/mL for Hg(Ⅱ).It has been applied to the direct determination of Hg(Ⅱ) in waste water with RSD of 1.3 %-2.0 % and recovery of 98%-103%.

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What this paper is about

A new reagent 1,3-di-[(4-nitrobenzenediazoa)]benzenetriazene(DNBDBT) was synthesized,and its colour reaction with Hg(Ⅱ) was studied in the presence of Triton X-100.The results showed that Hg(Ⅱ) reacts with DNBDBT to form a stable red complex in a medium of Na2B4O7-NaOH buffer solution at pH 10.0.The apparent molar absorptivity was 1.15×105 L·mol-1·cm-1 at the maximum absorption of 564 nm.Beer's law was obeyed in the concentration range of 0-0.6 μg/mL for Hg(Ⅱ).It has been applied to the direct determination of Hg(Ⅱ) in waste water with RSD of 1.3 %-2.0 % and recovery of 98%-103%.

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Available abstract

A new reagent 1,3-di-[(4-nitrobenzenediazoa)]benzenetriazene(DNBDBT) was synthesized,and its colour reaction with Hg(Ⅱ) was studied in the presence of Triton X-100.The results showed that Hg(Ⅱ) reacts with DNBDBT to form a stable red complex in a medium of Na2B4O7-NaOH buffer solution at pH 10.0.The apparent molar absorptivity was 1.15×105 L·mol-1·cm-1 at the maximum absorption of 564 nm.Beer's law was obeyed in the concentration range of 0-0.6 μg/mL for Hg(Ⅱ).It has been applied to the direct determination of Hg(Ⅱ) in waste water with RSD of 1.3 %-2.0 % and recovery of 98%-103%.

Key concepts: Molar absorptivity, Reagent, Chemistry, Mercury (programming language), Color reaction, Nuclear chemistry, Buffer solution, Spectrophotometry

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