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1-苯基-3-甲基-4-苯甲酰吡唑酮-5(PMBP,简作HA)对金属离子的萃取能力比TTA更大,并且易于合成及纯化,价格也较低廉,因此已广泛用于分析分离工作中,并有专著及总结性文章予以系统介绍。PMBP对稀土的萃取工作也有较多的报导,对于La(Ⅲ)的萃取研究,常用分配法进行,通常是固定[HA]_(0)浓度,改变水相pH值,由lgD～pH关系图中得出直线斜率为3,从而确定萃合物为LaA_3。文献[5]则根据PMBP萃取Dy~(3+)试验,推断出萃合物是LaA_3,都没有考虑形成LaA_3·nHA的可能
1-Phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP) has a greater ability to extract metal ions than TTA and is easier to synthesize and purify and therefore less expensive Has been widely used in the analysis of separation work, and monographs and summary articles to be introduced systematically. PMBP also has more reports on the extraction of rare earths. For the extraction of La (Ⅲ), the common distribution method is usually used to fix the concentration of [HA] _ (0), and the pH of the aqueous phase is changed. The slope of the line was found to be 3, which confirmed that the extract was LaA_3. According to [5], the extraction of Dy ~ (3+) from PMBP can not be considered as LaA_3 · nHA