Determination of Cadmium at Ultra-trace Level by FI Cold Vapor Generation AAS with On-line Ion Exchange Preconcentration

Abstract

Abstract: Amethod for the determination of cadmium by flow injection cold vapor generation atomic absorption spectrometry(FI-CVGAAS) with an on line ion exchange micro column preconcentration system was developed using IRC₇₁₈, 122 and Muromac A-1 resin. The interferences from coexisting elements were studied. The detection limit(3σ) was 2.3-3.0 ng/Lwith a sampling frequency of 45-60/h. The precision was 2.0%-2.6% RSD( n=11) at 0.2 μg/Llevel. The method was applied to the analysis of water samples. Satisfactory recoveries of cadmium in reservoir water, tap water and brine waters were obtained for spiked samples.

Key words: Cadmium, Flow injection(FI), Ion-exchange preconcentration, Cold vapor generation, Atomic absorption spectrometry

CLC Number:

O657

TrendMD:

YAO Bo, XU Shu-Kun, FANG Zhao-Lun . Determination of Cadmium at Ultra-trace Level by FI Cold Vapor Generation AAS with On-line Ion Exchange Preconcentration[J]. Chem. J. Chinese Universities, 2001, 22(8): 1301.

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Determination of Cadmium at Ultra-trace Level by FI Cold Vapor Generation AAS with On-line Ion Exchange Preconcentration

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