ICP-MS测定电吸附找矿泡塑样品中微量元素

doi:10.3964/j.issn.1000-0593(2009)06-1687-04

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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0.001～2.2 μg·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。

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

Abstract：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, Tl, 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 ¹⁸⁵Re 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.

Key words：Inductively coupled plasma mass spectrometry(ICP-MS);Electrical absorption prospecting;Polyform sample;Trace elements

收稿日期: 2008-08-10 修订日期: 2008-11-20

中图分类号:

O657.6

通讯作者: 施意华 E-mail: syhua2000@163.com

引用本文:

施意华，杨仲平，黄俭惠，周奇明，熊传信 . ICP-MS测定电吸附找矿泡塑样品中微量元素[J]. 光谱学与光谱分析, 2009, 29(06): 1687-1690.
SHI Yi-hua, YANG Zhong-ping, HUANG Jian-hui, ZHOU Qi-ming, XIONG Chuan-xin . Determination of Trace Elements in Electrical Absorption Prospecting Polyform Sample by Inductively Coupled Plasma Mass Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(06): 1687-1690.

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