ICP-MS法测定银合欢种和种皮中27种金属元素含量

摘要

采用电感耦合等离子体质谱(ICP-MS)法测定了云南省建水县产银合欢种和种皮中27种金属元素的含量.其中13中金属元素V、Cr、Mn、Fe、Cu、Zn、As、Se、Mo、Ag、Cd、Tl、Pb等采用普通模式检测,14种金属元素Li、Be、B、Mg、Al、Co、Ni、Ga、Rb、Sr、Te、Ba、Bi、U等采用碰撞/反应池技术(CCT)模式测定,以消除样品溶液中潜在的干扰.实验条件下,Co、Ni、Cr、Zn、Se、Mo、Ag、Pb等8种金属元素未检出.方法检出限Fe为9.789 ng/mL、Cr为2.691 ng/mL,Zn为1.803 ng/mL,B为2.076 ng/mL,Mg为1.977 ng/mL,Al为3.024 ng/mL,Ni为1.824 ng/mL,其它元素为0,003～0.921 ng/mL,银合欢种精密度的RSD为0.141％～11.86％,银合欢种皮精密度的RSD为0.044％～31.14％,加标回收介干90.8％～107.1％之间.%The twenty seven metal elements in seed and testa of Leucaena glauca (L.) Benth. from Jianshui county in Yunnan province were determined by ICP-MS. There were fourteen such as Li, Be, B, Mg, Al, Co, Ni, Ga, Rb, Sr, Te, Ba, Bi and U were determined with the collision /reaction cell technology for the elimination of potential interference. Detection limits for most elements were between 0. 003 and 0. 921 ng / mL,and the precision ( RSD) of seed and testa was among 0.141% -11, 86% and 0. 044% -31. 14% with good recovery (90. 8% -107.1 %) respectively.