电感耦合等离子体质谱法测定水产品中铬、铜、锌、砷、镉、铅的含量

ICP-MS Determination of Chromium, Copper, Zinc, Arsenic, Cadmium and Lead in Aquatic Products

摘要: 取水产品样品0.500 0 g，加入硝酸5 mL、水2 mL、30%（质量分数）过氧化氢溶液1 mL，按微波消解程序进行消解，将消解液于100 ℃蒸发至1~2 mL，用水定容至25 mL。采用电感耦合等离子体质谱法测定上述溶液中铬、铜、锌、砷、镉、铅的含量。各元素测定值的相对标准偏差（n=6）在1.2%~5.9%之间，回收率在96.6%~102%之间。按上述方法分析标准物质GBW 10023、GBW 10024、GBW 10050，FAPAS质控基准物质TET012RM以及质控样品T07225QC，各元素测定值与认定值一致。

Abstract: The aquatic product sample (0.500 0 g) was digested with 5 mL of HNO₃, 2 mL of H₂O and 1 mL of 30% (w) H₂O₂ solution by microwave digestion program. The digested solution was evaporated to 1-2 mL at 100 ℃, and made its volume up to 25 mL with water. Chromium, copper, zinc, arsenic, cadmium and lead in above solution were determined by ICP-MS. Values of RSDs (n=6) for the 6 elements were found in the range of 1.2%-5.9%, and values of recovery found by standard addition method were in the range of 96.6%-102%. Standard reference materials of GBW 10023, GBW 10024, GBW 10050, FAPAS reference material TET012RM, and QC material T07225QC were analyzed by the above method, giving results in consistency with the certified values.