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  • Title: [Determination of lead in edible salt with solid-phase extraction and GFAAS].
    Author: Zhao X, Zhou S, Ma L, Yang D.
    Journal: Wei Sheng Yan Jiu; 2013 Jan; 42(1):119-21. PubMed ID: 23596722.
    Abstract:
    OBJECTIVE: Establishing a method for determination of lead in salt with solid-phase extraction and GFAAS. METHODS: Salt sample was diluted to a certain volume directly with ammonium acetate, then the sample solution was filtered through the solid phase extraction column which has been pre-activated. Lead ions were retained, and the sodium chloride matrix was removed. After elution, the collected lead ions was determined by graphite furnace atomic absorption spectrometry in 257.4 nm. RESULTS: This method can be used effectively to wipe off the sodium chloride in matrix. The limit of detection was 0.7 microg/kg and the limit of quantification was 2 microg/kg. CONCLUSION: Solid phase extraction technique can be used effectively to reduce the interference in matrix and improves the accuracy and reproducibility of detection.
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