碰撞池-电感耦合等离子体质谱法快速检测化妆品中重金属

Determination of heavy metals in cosmetics by inductively coupled plasma mass spectrometry with octopole reaction system

中文关键词:  电感耦合等离子体质谱法  碰撞池  微波消解  化妆品  重金属

英文关键词:inductively coupled plasma mass spectrometry  octopole reaction system  microwave digestion  cosmetic  heavy metal

中文摘要:

      目的 建立碰撞池—电感耦合等离子体质谱法(ICP-MS)测定复杂基质化妆品中铬、镍、砷、镉、汞、铅等重金属含量的快速检测方法。方法 样品经过微波消解处理, 用ICP-MS进行分析, 八级杆碰撞反应池结合屏蔽炬技术消除质谱干扰, 在线加入内标元素72Ge、115In和209Bi校正基体干扰。结果 各元素校正曲线的相关系数均大于0.9992, 方法检出限为0.4~2.2 ng/g, 相对标准偏差小于5.69%, 加标回收率为85.8%~104.2%, 有证标准参考物质的测定结果与标准值相符。结论 该方法前处理步骤简便快速, 适用于复杂基质化妆品中多种有害元素的快速准确测定。

英文摘要:

      Objective To establish a method for rapid determination of Cr, Ni, As, Cd, Hg and Pb elements in cosmetics with complex matrix by inductively coupled plasma mass spectrometry (ICP-MS) with octopole reaction system. Methods The samples were determined by ICP-MS after microwave digestion. Internal standard elements of germanium (72Ge), indium (115In) and bismuth (209Bi) were used to correct matrix interference, and the octopole reaction system (ORS) was used to eliminate mass spectrum interferences. Results The linear standard curves were obtained with the correlation coefficients above 0.9992. The detection limits of this method were 0.4~2.2 ng/g, and the relative standard deviations were less than 5.69%. The recovery rates were in the range of 85.8%~104.2%．The experimental results of standard reference materials were in good consistent with the certified values. Conclusion The method is simple and fast, and it is suitable for accurate quantitative analysis of heavy metals in cosmetics.