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水中低于0.05毫克/升微量铀的测定,一般用高灵敏度的荧光分析法。该法常用三辛胺、磷酸三丁酯、乙酸乙酯等萃取或活性炭吸附预富集分离铀。本工作的预先实验表明,只用0.1M三烷基氧膦(TRPO)萃取水中的铀,若相比为1:30时,萃取率仅为90％用噻吩甲酰三氟丙酮(TTA)萃取,其萃取率更低。根据三丁基氧膦-TTA协同萃取可提高铀分配系数的启示,笔者认为由于TRPO中的已基、庚基和辛基比丁基均具有更长的碳链,三个
Determination of trace amounts of uranium below 0.05 mg / L in water, generally with high sensitivity fluorescence analysis. The law commonly used trioctylamine, tributyl phosphate, ethyl acetate extraction or activated carbon adsorption pre-enrichment separation of uranium. Preliminary experiments in this work showed that only 0.1 M trialkylphosphine oxide (TRPO) was used to extract uranium in water, and the extraction rate was only 90% when compared with 1:30, with the extraction with t-toluyltrifluoroacetone (TTA) , Its extraction rate is lower. According to tributylphosphine oxide-TTA synergistic extraction can improve uranium partition coefficient enlightenment, I believe that because of the TRPO in the base, heptyl and octyl butyl have longer carbon chain, three