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2004•Chinese Journal of Spectroscopy LaboratoryRequires access

Synthesis of p-Sulphonamidobenzenediazoaminoazobenzene and Its Colour Reaction with Cadmium

Zheng Xi

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Abstract

A new triazene reagent,p-sulphonamidobenzenediazoaminoazobenzene(p-SADAA),was synthesized,and its color reaction with cadmium was studied.In pH 11.26 NH 4Cl-NH 3·H 2O buffer solution with the presence of nonionic surfactant OP,p-SADAA reacts with cadmium to form a 3∶1 stable complex with the maximum absorption wavelength of 510nm,and apparent molar absorptivity of 1.23×10 5L·mol -1·cm -1.Beer's law is obeyed for cadmium in the range of 0—10.67μg/25mL.The method was applied to the determination of trace cadmium in industrial wastewater with satisfactory results.

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What this paper is about

A new triazene reagent,p-sulphonamidobenzenediazoaminoazobenzene(p-SADAA),was synthesized,and its color reaction with cadmium was studied.In pH 11.26 NH 4Cl-NH 3·H 2O buffer solution with the presence of nonionic surfactant OP,p-SADAA reacts with cadmium to form a 3∶1 stable complex with the maximum absorption wavelength of 510nm,and apparent molar absorptivity of 1.23×10 5L·mol -1·cm -1.Beer's law is obeyed for cadmium in the range of 0—10.67μg/25mL.The method was applied to the determination of trace cadmium in industrial wastewater with satisfactory results.

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Available abstract

A new triazene reagent,p-sulphonamidobenzenediazoaminoazobenzene(p-SADAA),was synthesized,and its color reaction with cadmium was studied.In pH 11.26 NH 4Cl-NH 3·H 2O buffer solution with the presence of nonionic surfactant OP,p-SADAA reacts with cadmium to form a 3∶1 stable complex with the maximum absorption wavelength of 510nm,and apparent molar absorptivity of 1.23×10 5L·mol -1·cm -1.Beer's law is obeyed for cadmium in the range of 0—10.67μg/25mL.The method was applied to the determination of trace cadmium in industrial wastewater with satisfactory results.

Key concepts: Molar absorptivity, Cadmium, Reagent, Triazene, Color reaction, Chemistry, Buffer solution, Absorption (acoustics)

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