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2002•Journal of Analytical ScienceRequires access

Micelle Kinetic-Spectrophotometric Determination of Trace Cadmium

Huang Xiang-yuan

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Abstract

It has been observed that trace cadmium can sensitively catalyze the reaction of (NH 4) 2S 2O 8 oxidizing discoloration of pyrogallol red in H 3BO 3-KCl-Na 2CO 3 buffer solution in the existence of CTMAB. The optimum conditions and kinetic parameters were investigated in detail and a method for the determination of trace cadmium was proposed. The linear range was 0.04~0.20 μg/25 mL cadmium and the detection limit was 1.28×10 -10 g/mL. The method has been applied to the determination of cadmium in lake water with satisfactory results.

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What this paper is about

It has been observed that trace cadmium can sensitively catalyze the reaction of (NH 4) 2S 2O 8 oxidizing discoloration of pyrogallol red in H 3BO 3-KCl-Na 2CO 3 buffer solution in the existence of CTMAB. The optimum conditions and kinetic parameters were investigated in detail and a method for the determination of trace cadmium was proposed. The linear range was 0.04~0.20 μg/25 mL cadmium and the detection limit was 1.28×10 -10 g/mL. The method has been applied to the determination of cadmium in lake water with satisfactory results.

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Available abstract

It has been observed that trace cadmium can sensitively catalyze the reaction of (NH 4) 2S 2O 8 oxidizing discoloration of pyrogallol red in H 3BO 3-KCl-Na 2CO 3 buffer solution in the existence of CTMAB. The optimum conditions and kinetic parameters were investigated in detail and a method for the determination of trace cadmium was proposed. The linear range was 0.04~0.20 μg/25 mL cadmium and the detection limit was 1.28×10 -10 g/mL. The method has been applied to the determination of cadmium in lake water with satisfactory results.

Key concepts: Chemistry, Cadmium, Detection limit, Oxidizing agent, Pyrogallol, Micelle, Linear range, Buffer solution

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