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HG-AFS Determination of Inorganic Arsenic in Food After Separation with Cation Exchange Resin

Tang Zeng-xu

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Abstract

Micro-amounts of inorganic arsenic in food was separated from MMA and DMA by cation exchange resin,and determined by HG-AFS.Preparation of the cation exchange column and analytical conditions,including pH of eluent,flow rate of eluent,and interferences of the coexisting ions were studied and optimized.Detection limit (3s/k) found was 0.76μg·L~(-1),and RSD(n=12) was 1.8%.The proposed method was used in the determination of inorganic arsenic in cucumber sample,giving the values of recovery in the range of 96.3%-98.2%.

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What this paper is about

Micro-amounts of inorganic arsenic in food was separated from MMA and DMA by cation exchange resin,and determined by HG-AFS.Preparation of the cation exchange column and analytical conditions,including pH of eluent,flow rate of eluent,and interferences of the coexisting ions were studied and optimized.Detection limit (3s/k) found was 0.76μg·L~(-1),and RSD(n=12) was 1.8%.The proposed method was used in the determination of inorganic arsenic in cucumber sample,giving the values of recovery in the range of 96.3%-98.2%.

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Available abstract

Micro-amounts of inorganic arsenic in food was separated from MMA and DMA by cation exchange resin,and determined by HG-AFS.Preparation of the cation exchange column and analytical conditions,including pH of eluent,flow rate of eluent,and interferences of the coexisting ions were studied and optimized.Detection limit (3s/k) found was 0.76μg·L~(-1),and RSD(n=12) was 1.8%.The proposed method was used in the determination of inorganic arsenic in cucumber sample,giving the values of recovery in the range of 96.3%-98.2%.

Key concepts: Arsenic, Chemistry, Column chromatography, Inorganic arsenic, Ion-exchange resin, Ion exchange, Detection limit, Ion chromatography

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