电感耦合等离子体质谱法同时测定葡萄中40种痕量元素

Simultaneous Determination of 40 Trace Elements in Grapes by ICP-MS

摘要: 葡萄样品用微波消解处理后,采用电感耦合等离子体质谱法测定所得样品溶液中40种元素的含量。使用合适的同位素、内标和干扰校正方程消除了被测元素的干扰。方法的检出限(3s)在0.003 6~0.53 μg·L-1之间。方法用于苹果标准物质(GBW 10019)的分析,测定值与认定值相符,相对标准偏差(n=6)在1.6%~8.5%之间。

Abstract: The sample of grape was treated with HNO3 by microwave assisted digestion, and the contents of 40 trace elements in the sample solution were determined by ICP-MS. The interferences were eliminated by choice of suitable isotopes, internal standards and correction formula. Values of detection limits (3s) of the method found were in the range of 0.003 6-0.53 μg·L-1. The proposed method was applied in the analysis of a CRM of apple (GBW 10019), giving results in consistency with the certified values. Values of RSD′s (n=6) were found in the range of 1.6%-8.5%.