| 液膜富集火焰原子吸收法测定水中痕量镉 |
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| 引用本文： | 李龙泉,陈树榆,吴纯德,林淑钦,李亚栋.液膜富集火焰原子吸收法测定水中痕量镉[J].环境科学,1994(1):88-91. |
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| 作者姓名： | 李龙泉 陈树榆 吴纯德 林淑钦 李亚栋 |
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| 作者单位： | 中国科学技术大学，中国科技大学结构分析开放实验室 |
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| 摘 要： | 研究表面活性剂、流动载体，内相解吸剂、外相酸度、液体石蜡和油内比等因素对分离富集镉的影响，且考察其膜的溶胀程度和破乳难易。确定了Ｓｐａｎ８０－Ｐ２０４－煤油－ＨＣｌ液膜体系的最佳组成及富集条件。分４批处理料液，富集倍数达８０以上．回收率在９７％以上，且选择性好。与火焰ＡＡＳ法组合可测定ｐｐｂ级的镉。本法灵敏度高准确度好。
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| 关 键 词： | 镉，液膜，富集，火焰原子吸收法 |
| 修稿时间： | 1992/3/14 0:00:00 |
The Enrichment of Trace Cadmium by Liquid Membrane and It's Determination by Flame Atomic Absorption Spectrometry |
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| Li Longquan.The Enrichment of Trace Cadmium by Liquid Membrane and It's Determination by Flame Atomic Absorption Spectrometry[J].Chinese Journal of Environmental Science,1994(1):88-91. |
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| Authors: | Li Longquan |
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| Abstract: | In this paper, the selective preconcentration of trace of cadmium by liquid membrane is studied and the best conditions for enriching trace cadmium reported. The liquid membrane composed of span80-P204-kerosene-HCl is found to be more effective. The demulsification of the emulsion phase after extraction is carried. out by a heat demulsification technique. The emulsion swelling is examined. Cd2+ at×10-9 level can be enriched and determined by FAAS. A recovery of more than 97% and a enrichment of over 80-fold are obtained for Cd2+. The results was satisfied. |
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| Keywords: | cadmium liquid membrane enrichment atomic absorption spectrometry |
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