电感耦合离子体质谱法测定碳酸盐岩中30种痕量元素及干扰校正研究  

Studies on the Correction of Interference for 30 Trace Elements in Carbonate by Inductively Coupled Plasma-Mass Spectrometry

作　　者：门倩妮[1] 周远洋[1] 刘玲[1] 温良[1] 黄北川[1] 

机构地区：[1]武警黄金第五支队,陕西西安710100

出　　处：《广东化工》2014年第24期104-107,共4页Guangdong Chemical Industry

摘　　要：研究并优化了四酸溶样体系下ICP-MS同时测定碳酸盐岩中Ba、Be、Bi、Cd、Ce、Co、Cr、Cs、Cu、Ga、Hf、In、La、Li、Mn、Mo、Nb、Ni、Pb、Rb、Sb、Sc、Sr、Ta、Th、Tl、U、V、W、Zn 30种痕量元素的方法。选用适当的国家一级标准物质随样品一起溶解来绘制工作曲线,使得结果有了一定的改善。研究了ICP-MS的干扰因素及干扰的校正研究,通过在线加入内标103Rh、最佳化仪器参数、选择适当的同位素以及运用数学公式校正,提高了测定结果的准确度和精密度,适用于批量测定地质样品碳酸盐岩中的多种痕量元素。The paper researches the optimization of the method to determine simultaneously 30 kinds of the trace elements in carbonate including Ba, Be, Bi, Cd, Ce, Co, Cr, Cs, Cu, Ga, Hf, In, La, Li, Mn, Mo, Nb, Ni, Pb, Rb, Sb, Sc, Sr, Ta, Th, Tl, U, V, W and Zn by ICP-MS in HNO3-HCl-HF-HClO4 system. We choose the standard curve which the appropriate substances was dissolved together with the sample. The main works are excluding the interference of nuclear isobars by selecting the proper isotopes, adding ^103Rh as internal standard on-site, optimizing instrument parameters and obtaining the interference-modification equation to modify the interference. As a result, the measurement accuracy and precision of results have improved. Then, it can be applied to analyze a variety of trace elements in geological samples of carbonates.

关 键 词：等离子质谱 碳酸盐岩 痕量元素 干扰校正 

分 类 号：O657.3[理学—分析化学]