电感耦合等离子体质谱法测定植物中痕量钯的光谱干扰消除方法的研究  

Elimination of Spectral Interference in the Determination of Trace Palladium in Plants by Inductively Coupled Plasma-Mass Spectrometry

作　　者：朱若华[1] 王娟[1] 施燕支[2] 

机构地区：[1]首都师范大学化学系,北京100037 [2]首都师范大学分析测试中心,北京100037

出　　处：《光谱学与光谱分析》2007年第4期792-795,共4页Spectroscopy and Spectral Analysis

基　　金：北京市自然科学基金项目(2063025);北京市教委项目(M200610028007)资助

摘　　要：研究了电感耦合等离子体质谱(ICP-MS)测定植物中微量钯的方法。详细讨论了样品前处理的方法及测定铂族元素钯时受到的质谱干扰,建立了新的干扰方程,可有效地消除镉(Cd)等元素对钯测定的干扰,省去了传统分离步骤,与铜试剂(DDTC)络合分离消解液的测定结果比较,相对标准偏差<8%。采用铂族元素标准矿样GBW07293评价准确性,相对误差5.5%,方法简便并准确有效。应用所建方法测定北京市市区主要公路道路两旁四种常见植物草坪草,国槐,小叶冬青和松树中钯的含量。Inductively coupled plasma-mass spectrometry （ICP-MS） was employed to determine palladium in plants. The spectroscopic interferences with Pd in the ICP-MS determination were studied in detail. Spectral interferences with Pd were corrected using mathematical correction equation based on abundance ratio. The potential of the method was evaluated by the comparison with the method using complex separation by DDTC and the determination of PGEs （platinum group elements） in standard reference materials （GBW 07293）. The experimental results showed that using the studied method, Pd could be determined in the leaves of Japanese pagoda, annual grass, holly and tine tree collected along main roads in Beijing （China） during 2005 with satisfactory.

关 键 词：钯 植物 电感耦合等离子体质谱 质谱干扰 校正方程 

分 类 号：O657.6[理学—分析化学]