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Studies on Synthesis of a New Chromogenic Reagent HSNPT and Its Colour Reaction with Copper

Yun‐Fa Zheng

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Abstract

A new chromogenic reagent 2-hydroxy-4-sulfamylbenzen-3-(4-Nitrophenyl)-Triazene(HSNPT) has been synthesized and desoribed in this paper.A color reaction of Cu(Ⅱ) with HSNPT was investigated.The experimental results showed that,in the presence of the surface active agent TX-100 and in a Na_2B_4O_(7-)NaOH medium at pH 11.0,Cu(Ⅱ) reacts with HSNPT to form a light yellow complex. The molar ration of Cu(Ⅱ) to HSNPT is1∶3.The molar absorbtivity of the complex is e=1.60×10~5L·mol~(-1)·cm~(-1) at the determination wavelength of 535 nm.The Beer's law is well obeyed in the range of 0～12μg /25mL for copper at the determination wavelength.This method has been successfully applied to determine trace amounts of copper in the alloy samples with satisfactory results.

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What this paper is about

A new chromogenic reagent 2-hydroxy-4-sulfamylbenzen-3-(4-Nitrophenyl)-Triazene(HSNPT) has been synthesized and desoribed in this paper.A color reaction of Cu(Ⅱ) with HSNPT was investigated.The experimental results showed that,in the presence of the surface active agent TX-100 and in a Na_2B_4O_(7-)NaOH medium at pH 11.0,Cu(Ⅱ) reacts with HSNPT to form a light yellow complex. The molar ration of Cu(Ⅱ) to HSNPT is1∶3.The molar absorbtivity of the complex is e=1.60×10~5L·mol~(-1)·cm~(-1) at the determination wavelength of 535 nm.The Beer's law is well obeyed in the range of 0～12μg /25mL for copper at the determination wavelength.This method has been successfully applied to determine trace amounts of copper in the alloy samples with satisfactory results.

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Available abstract

A new chromogenic reagent 2-hydroxy-4-sulfamylbenzen-3-(4-Nitrophenyl)-Triazene(HSNPT) has been synthesized and desoribed in this paper.A color reaction of Cu(Ⅱ) with HSNPT was investigated.The experimental results showed that,in the presence of the surface active agent TX-100 and in a Na_2B_4O_(7-)NaOH medium at pH 11.0,Cu(Ⅱ) reacts with HSNPT to form a light yellow complex. The molar ration of Cu(Ⅱ) to HSNPT is1∶3.The molar absorbtivity of the complex is e=1.60×10~5L·mol~(-1)·cm~(-1) at the determination wavelength of 535 nm.The Beer's law is well obeyed in the range of 0～12μg /25mL for copper at the determination wavelength.This method has been successfully applied to determine trace amounts of copper in the alloy samples with satisfactory results.

Key concepts: Chromogenic, Reagent, Copper, Color reaction, Triazene, Molar absorptivity, Chemistry, Trace Amounts

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