ICP-MS测定电吸附找矿泡塑样品中微量元素  

Determination of Trace Elements in Electrical Absorption Prospecting Polyform Sample by Inductively Coupled Plasma Mass Spectrometry

作　　者：施意华[1] 杨仲平[1] 黄俭惠[1] 周奇明[1] 熊传信[1] 

机构地区：[1]桂林矿产地质研究院,广西桂林541004

出　　处：《光谱学与光谱分析》2009年第6期1687-1690,共4页Spectroscopy and Spectral Analysis

基　　金：国家"十一五"科技攻关计划项目(2004BA615A-03);广西自然科学基金项目(0640181)资助

摘　　要：建立了电感耦合等离子质谱法(ICP-MS)测定电吸附找矿泡塑样品中钒、铬、锰、钴、镍、铜、锌、镓、铌、钼、银、镉、金、铊、铅和铋等16种微量元素的方法。进行了灰化法-王水提取、硝酸-过氧化氢消解-王水提取和沸水浴王水提取试样的比较实验,以硝酸-过氧化氢-王水提取法为最佳样品分解方法。对仪器工作参数进行了优化,选取103Rh和185Re作为测定元素的内标元素,进行了测定同位素的选择及干扰的消除等实验,测定元素校准曲线的相关系数都在0.999 8以上,各元素的检出限分别为0.001～2.2μg.g-1,精密度介于1.39%～4.84%之间,样品加标回收率为94.86%～105.2%。方法简便快速,已应用于大量泡塑样品分析。An ICP-MS method was established for the determination of sixteen trace elements, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Nb, Mo, Ag, Cd, Au, T1, Pb and Bi in electrical absorption prospecting polyform. Three methods for polyform samples （ashing method, extraction by HNO3 ＋ H2O2 and digestion with aqua regia） were compared and the results showed that the second method is the best one. The best operational paramenters of X series ICP-MS were confirmed, the inner standard ^103Rh and ^185 Re were selected for the determination of elements, and analysis of isotopes interference correction equations was established. Satisfactory linearity of working curves of the sixteen trace elements was obtained, giving all their correlation coefficients over 0. 999 8. The determination limit of the analytes was in the range of 0. 001-2.2 μg· g^-1. The precision was 1.39%-4. 84%, and the recoveries were between 94.86% and 105.2%. The method is sensitive, quick and simple and has been applied to the analysis of a great number of polyform samples.

关 键 词：电感耦合等离子质谱法 电吸附找矿 泡塑样品 微量元素 

分 类 号：O657.6[理学—分析化学]