电感耦合等离子体质谱法测定饮用纯净水中24种金属元素

Determination of 24 kinds of metal elements in purified water by inductively coupled plasma mass spectrometry

中文关键词:  电感耦合等离子体质谱法  饮用纯净水  金属元素

英文关键词:inductively coupled plasma mass spectrometry  purified water  metal elements

中文摘要:

      目的 建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)同时快速测定饮用纯净水中Tl、Ba、Sb、Sn、Cd、Se、Cu、Ni、Co、Mn、V、Ti、Cr、Mo、B、Al、Zn、Fe、Mg、Ca、As、Sr、Hg、Pb等24种金属元素含量的分析方法。 方法 饮用纯净水样品经硝酸酸化后直接进样, 使用ICP-MS测定, 并对方法的线性范围、检出限、精密度和回收率等进行考察。 结果 24种元素的相关系数均大于0.999, 线性良好, 方法检出限为0.003~0.8 μg/L, 定量限为0.01~3 μg/L。各元素加标回收率在87.0%~117.0%之间, 测定结果相对标准偏差(relative standard deviation, RSD)在0.090%~5.527%之间。 结论 该检测方法简单、快速、准确、灵敏度高, 适用于饮用纯净水中多种金属元素的测定。

英文摘要:

      Objective To establish a method for simultaneous determination of 24 kinds of metal elements including Tl, Ba, Sb, Sn, Cd, Se, Cu, Ni, Co, Mn, V, Ti, Cr, Mo, B, Al, Zn, Fe, Mg, Ca, As, Sr, Hg, Pb, etc. in purified water by inductively coupled plasma mass spectrometry (ICP-MS). Methods Water samples were detected by ICP-MS after acidification (HNO3). At the same time, the linear relation, accuracy, precision and limit of quantitation of this method were investigated. Results It showed good linearity and the correlation coefficients of 24 kinds of elements were all greater than 0.999. The detection limits were obtained between 0.003~0.8 μg/L, and the limits of quantification were between 0.01~3 μg/L. The recovery rates were between 87.0%~117.0%, with the relative standard deviations (RSDs) between 0.090%~5.527%. Conclusion The established method is simple, rapid, accurate and sensitive, which is suitable for the determination of metal elements in purified water.