【摘要】 <正> PMBP（1-苯基-3-甲基-4-苯甲酰基吡唑酮-5）是一种β-二酮类的螯合剂,pKa=4.04,有较高的离解度,易与金属离子生成络合物。其烯醇式结构中有一个能被金属离子取代的氢原子和一个酮基结合成六元环。如下: N=C—CH₃更多还原

【Abstract】 The sample solution buffered with HCl-hexamine (pH 5.2) was passed through a mall column (0.8×5 cm) conataining 0.5g Cl-PMBP resin. Various eluents were used for separating RE, Sc and Th. Then RE, Sc and Th were determined by spectrophotometry with CPA-mN at 670 nm, CPA-mK at 670 nm and arsenazo Ⅲ at 660 nm, respectively.更多还原