Microwave-Assisted Digestion with Atomic Absorption Spectrometry for Determination of Pb,Cd,Cu,Fe,Zn and Mn in Food and Assessment of Uncertainty of Analytical Results
YANG Feng-hua
Zhejiang Huzhou Centre for Disease Control and Prevention,Huzhou 313000,China
Abstract：An AAS method for the determination of trace amount of Pb,Cd,Cu,Fe,Mn and Zn in food was established,and the uncertainty of the analytical results was assessed in the present paper. Microwave-assisted digestion technigue was used to prevent the elements from volatile losses and to reduce the blank. Fe,Mn,Cu and Zn were determined by flame AAS,and Pb and Cd were determined by using graphite furnace AAS. A National Standard Material GBW 07602(GSV-1) was analyzed and the results were in accordance with the certificate values,verifying the accuracy and the precision of the proposed method. The uncertainty of the analytical results was assessed on the basis of the requirements of the ISO documents. Uncertainty sources from all procedures were evaluated.
杨凤华. 微波消解—AAS法测定食品中铅、镉、铁、锰、铜和锌及其不确定度评估[J]. 光谱学与光谱分析, 2007, 27(07): 1440-1443.
YANG Feng-hua. Microwave-Assisted Digestion with Atomic Absorption Spectrometry for Determination of Pb,Cd,Cu,Fe,Zn and Mn in Food and Assessment of Uncertainty of Analytical Results . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(07): 1440-1443.
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