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

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。

ve 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.