摘要
本文对支撑液膜萃取用于流动注射在线分离进行了探索。支撑液膜分离的原理是将有机相吸附到能将两种水相分开的微孔膜中，使待分离的物质从一种水相转移到另一水相，从而达到分离的目的。以铀（Ⅵ）为研究对象表明，支撑液膜萃取分离可用于流动注射分析，为复杂体系微量组分提供了又一快速、自动的分析方法。在流动注射系统中，试样中微量铀经磷酸三丁酯（TBP）支撑液膜萃取分离后，在已有的测铀（Ⅵ）条件下测定，方法的测定范围为10～100μg／mL铀（Ⅵ），测定的相对标准偏差为0.9％，每小时可以完成20次样品测定，膜使用寿命为1个月（100个样品次以上）。
The application of extraction by supported liquid membranes (SLM)in flow injection analysis (FIA)on-line separation has been investigated. The principle of a SLM process is that the organic phase is adsorbed to a porous hydrophobic membrane separating the two aqueous phases which correspond to the feed and strip solution in the extraction process. It shows that SLM separations can be used in FIA. It can supply another rapid and automatic analysis method for determining uranium (Ⅵ). In the FIA system, trace uranium (VI ) in samples is determined under a having existed determination conditions after trace uranium (Ⅵ)being separated by SLM. A determination range of the method is 10-- 100 ig/mL and the relative standard deviation (RSD)is 0. 9 %,the determination speed is 20 samples/h. The membrane can be used for a month. (over 100 samples)
出处
《铀矿冶》
CAS
1998年第2期127-133,共7页
Uranium Mining and Metallurgy
