ICP-AES法测定水中金属和非金属元素
Determination of Metals and Non-metals in Water by Inductively Coupled Plasma-Atomic Emission Spectrometry
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摘要: 目的 为满足生活饮用水卫生规范中多元素分析的需要,建立准确快捷测定水中23种金属和非金属元素的方法.方法 用电感耦合等离子体发射光谱ICP-AES法,同时测定Ag、Al、B、Ba、Be、Ca、Cd、Co、Cr、Cu、Fe、K、Li、Mg、Mn、Mo、Na、Ni、Si、Sr、Ti、V、Zn.结果 方法快速、灵敏,各元素的检出限分别在0.00002mg/L～0.06mg/L之间;线性良好,线性相关系数均≥0.998;重现性好,不同浓度的变异系数为0.37%～2.8%;准确度高,回收率在91%～116%之间,对标样GBW08607、GSBZ50009-88、CW82、GSBE50019-90测定,数值均在允许范围内,与原子吸收分光光度法对比,P均>0.05,表明两种方法检测结果之间无显著性差异.结论 本法实现多元素同时测定,准确可靠,极大地提高了工作效率,适用于水质分析.Abstract: Objective To study the fast and accurate method for determination of 23 metals and non-metals in water required by "Sanitary Standards for Drinking Water".Methods The method of ICP -AES was developed for the determination of various elements including Ag、Al、B、Ba、Be、Ca、Cd、Co、Cr、Cu、Fe、K、Li、Mg、Mn、Mo、Na、Ni、Si、Sr、Ti、V、Zn.Results The method provided excellent sensitivity and was very fast for the simultaneous determination of multi-elements.The detection limit of each element was between 0.000 02mg/L and 0.06mg/L.Standard linear correlation r≥0.998.Standard deviations were between 0.37% and 2.8%.Recoveries of spiked natural samples were of the range 91%-116%.Analysis results of standard reference material(GBW08607,GSBZ50009 -88、CW82、GSBE50019-90) conformed well with the certified values.Accuracy of results was further validated by comparing with the data obtained using FAAS.Conclusion The method for the simultaneous determination of metals and non-metals by ICP-AES was efficient,and the results were accurate and reliable.
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