Julshamn Kaare, Maage Amund, Norli Hilde Skaar, Grobecker Karl H, Jorhem Lars, Fecher Peter, Dowell Dawn
National Institute of Nutrition and Seafood Research (NIFES), P.O. Box 2029, Nordnes, 5817 Bergen, Norway.
J AOAC Int. 2013 Sep-Oct;96(5):1101-2. doi: 10.5740/jaoacint.13-143.
The method for the determination of As, Cd, Hg, and Pb in foods by pressure digestion and inductively coupled plasma (ICP)/MS, previously published in J. AOAC Int. 90, 844-856 (2007), was approved as First Action 2013.06 on April 9, 2013 by the Method- Centric Committee for Elemental Contaminants in Food. Digestion occurs using nitric acid in a closed vessel with elevated temperature and pressure by conventional or microwave-assisted heating. Determination occurs using ICP/MS. The elemental concentration ranges for As were 0.06-21.4, for Cd 0.03-28.3, for Hg 0.04-0.6, and for Pb 0.01-2.4 in mg/kg dry matter. The repeatability RSD (RSDr) ranged from 3.8 to 24% for As, 2.6 to 6.9% for Cd, 4.8 to 8.3% for Hg, and 2.9 to 27% for Pb. Reproducibility RSD (RSDR) ranged from 9.0 to 28% for As, 2.8 to 18% for Cd, 9.9 to 24% for Hg, and 8 to 50% for Pb.
采用压力消解和电感耦合等离子体质谱（ICP/MS）测定食品中砷、镉、汞和铅的方法，曾发表于《美国分析化学家协会杂志》90, 844 - 856 (2007)，于2013年4月9日被食品中元素污染物方法中心委员会批准为2013.06首次行动方法。消解在密闭容器中使用硝酸，通过常规或微波辅助加热，在高温高压条件下进行。采用ICP/MS进行测定。干物质中砷的元素浓度范围为0.06 - 21.4 mg/kg，镉为0.03 - 28.3 mg/kg，汞为0.04 - 0.6 mg/kg，铅为0.01 - 2.4 mg/kg。砷的重复性相对标准偏差（RSDr）范围为3.8%至24%，镉为2.6%至6.9%，汞为4.8%至8.3%，铅为2.9%至27%。再现性相对标准偏差（RSDR）范围为，砷为9.0%至28%，镉为2.8%至18%，汞为9.9%至24%，铅为8%至50%。
