| 液膜富集火焰原子吸收法测定水中痕量镉 |
| 摘要点击 1593 全文点击 1597 修订日期：1992-03-14 |
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| 中文关键词 镉 液膜 富集 火焰原子吸收法 |
| 英文关键词 cadmium liquid membrane enrichment atomic absorption spectrometry |
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| 中文摘要 |
| 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。 |
| 英文摘要 |
| 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. |
