Determination of trace lead in food additive sodium carboxymethyl cellulose by atomic absorption spectrometry

Determination of trace lead in food additive sodium carboxymethylcellulose (CMC) by atomic absorption method. After ashing, the sample is extracted and enriched with APDC-DDTC-MIBK system. The air-acetylene flame atom is used Absorption method to determine its content. The optimized determination conditions were established, and interference experiments were conducted on the possible elements. The relative standard deviation of the determination of lead in this method is 1.6-2.3, and the recovery rate is 98.7 ~ 101.5, the results are very satisfactory.

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