ICP-MS法测定地域标志产品四川涪城麦冬中的重金属含量

目的]建立电感耦合等离子体质谱法(ICP-MS)测定涪城麦冬中铅、镉、汞、砷、铬、铜的方法,明确涪城麦冬的重金属含量。方法]样品经微波消解后,采用ICP-MS同时测定涪城麦冬中铅、镉、汞、砷、铬、铜的含量。结果]各元素线性关系良好,相关系数(r)均大于0.999 0,精密度试验的相对标准偏差小于5%,回收率在91.8%~103.0%,检出限均小于0.01 mg/kg。结论]该方法简便快速、灵敏度高,满足涪城麦冬中重金属含量的测定要求。

Determination of Heavy Metal Elements in Sichuan Fucheng Ophiopogon japonicus by ICP-MS Method

Objective]The aim was to establish a method by Inductively coupled plasma mass spectrometry for the determination of lead, cad-mium, mercury, arsenic, chromium and copper in Fucheng Ophiopogon japonicus, and study the heavy metal content of Fucheng Ophiopogon japonicus.Method]After the sample was digested by microwave, the contents of lead, cadmium, mercury, arsenic, chromium and copper in Fucheng Ophiopogon japonicus were determined by ICP-MS. Result] The linear relationship of each element was good; r was greater than 0.9990; the RSD of precision test was less than 5%; the recovery rate was 91.8% -103.0%, and the detection limit was less than 0.01 mg/kg.Conclusion]The method is simple and sensitive,so it can satisfy the determination demand for Fucheng Ophiopogon japonicas.