The Effects of Different Solvents on the Determination of Lead in Pork Were Discussed
Beijing Changping District Farmland Protection Station, Beijing 102299, China
| Abstract: | [Objective]: To optimize the graphite furnace atomic absorption spectrometry, compare the effects of blank pork matrix and 1% nitric acid as solvent on the detection of lead in pork, and establish a method for quantitative detection of lead in pork. [Methods]: The graphite furnace heating program and matrix modifier were optimized, and the method was screened. The results of three-level standard addition test and quality control product test of these two solvents were compared. [Results]: Under the screening conditions, with blank pork matrix as solvent, the correlation coefficient of the standard curve was 0.9999, the recovery rate of the three levels was 91.9% ~ 97.9%, and the coefficient of variation was 4.9% ~ 13.1%. The detection limit was 0.0134 mg / Kg. The test results of quality control products were within the allowable range; the test results with 1% nitric acid as solvent did not meet the standard requirements. [Conclusion]: Under the screening conditions, the accurate detection of lead in pork can be achieved by graphite furnace atomic absorption spectrometry with blank pork matrix as solvent. |
| Keywords: | Graphite Furnace-atomic Absorption Method; Matrix; Matrix Modifier; Detection Limit |
| DOI: | 10.57237/j.wjfse.2024.01.001 |
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收稿日期: 2024-01-01
接受日期: 2024-03-08
在线出版日期: 2024-03-18
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