微波消解-ICP-MS同时测定珠光颜料中的8种元素

Simutaneous Determination of 8 Elements in Pearlescent Pigment by ICP-MS with Microwave Digestion

采用微波消解-电感耦合等离子体质谱法(ICP-MS)同时测定珠光颜料中Pb、Cd、As、Hg、Ba、Cr、Sb、Se 8种元素的含量。各元素的校准曲线线性关系良好(r=0.9991—1.0000),检出限为1.17—30.59μg/L,用标准加入法作了回收率实验,在1.0—10mg/kg水平回收率在94.5%—101.7%之间。对样品平行测定5次,各元素的RSD均不大于2.03%,该方法的精密度和准确度良好,可以用来进行珠光颜料的质量控制和安全评价。

A method for the simultaneous determination of the contents of eight elements（Pb, Cd, As, Hg, Ba, Cr, Sb, Se） in pearlescent pigment were established by industively coupled plasma-mass spectrometry （ICP-MS） with microwave digestion. Good linearity of the calibration curves was obtained for all target elements（r= 0. 9991-1. 0000）. Detection limits for these eight elements were in tlm range of 1.17--30.59μg/L. The recoveries were carried out by standard addition method and recovery was 94. 5%-101. 7% for elements concentration between 1. 0mg/kg and 10mg/kg. The pearlescent pigment sample was measured parallel five times and the RSD was lower than or equal to 2.03% ,and the method had good precise and accuracy. The technique is applied for the quality control and safety evaluation of pearlescent pigment.