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2001•Journal of Nanchang UniversityRequires access

STUDY ON THE DETERMINATION OF TRACE Cd(II) BY CATALYTIC KINETIC-SPECTROPHOTOMETRY

Xiang Huang

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Abstract

It has been studied that in H 3BO 3-KCl-Na 2CO 3 trace Cd(Ⅱ) can sensitively catalyze the new indicative reaction of (NH 4) 2S 2O 8 oxidizing discoloration of the pyrogallol red.The kinetic optimum conditioins and mechanism of the reaction were investigated in detail and a new method for the determination of trace cadmium was proposed.The detection limit is 6.9×10 -6 mg/mL and the linear range of determination is 0.0-10.0 μg/25 mL.It has been satisfactorily applied to the determination of trace Cd(Ⅱ) in the waste water.

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What this paper is about

It has been studied that in H 3BO 3-KCl-Na 2CO 3 trace Cd(Ⅱ) can sensitively catalyze the new indicative reaction of (NH 4) 2S 2O 8 oxidizing discoloration of the pyrogallol red.The kinetic optimum conditioins and mechanism of the reaction were investigated in detail and a new method for the determination of trace cadmium was proposed.The detection limit is 6.9×10 -6 mg/mL and the linear range of determination is 0.0-10.0 μg/25 mL.It has been satisfactorily applied to the determination of trace Cd(Ⅱ) in the waste water.

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Available abstract

It has been studied that in H 3BO 3-KCl-Na 2CO 3 trace Cd(Ⅱ) can sensitively catalyze the new indicative reaction of (NH 4) 2S 2O 8 oxidizing discoloration of the pyrogallol red.The kinetic optimum conditioins and mechanism of the reaction were investigated in detail and a new method for the determination of trace cadmium was proposed.The detection limit is 6.9×10 -6 mg/mL and the linear range of determination is 0.0-10.0 μg/25 mL.It has been satisfactorily applied to the determination of trace Cd(Ⅱ) in the waste water.

Key concepts: Detection limit, Pyrogallol, Oxidizing agent, Linear range, Chemistry, TRACE (psycholinguistics), Spectrophotometry, Cadmium

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