高聚物萃取分离光度法测定Pb^(2+)

Polymer Extrction-spectrophotometric Measurement of Pb^(2+)

利用非挥发性水溶性高聚物的水溶液在无机盐存在下可分成两相的特点 ,讨论了 Pb2 +、Cd2 +、Co2 +、Cu2 +、Fe3+、Ni2 +、Zn2 +混合液中 Pb2 +的分离和测定条件 ,实现了 Cd2 +、Co2 +、Cu2 +、Fe3+、Ni2 +、Zn2 +与 Pb2 +的定量分离和测定 ,结果表明方法简便、可靠、快速 ,在 Pb2 +含量 0～ 4.0μg/m L范围内有良好的线性关系。回收率在 95 %～ 1 0 5 %。

Pb 2+ in mixed solution of Pb 2+、Cd 2+、Co 2+、Cu 2+、Fe 3+、Ni 2+ and Zn 2+ is separated and determined based on the phase separation of aqueous polymer solution in the presence of inorganic salt. The method is quick, reliable and easy to deal with. A linear relations hip exists when the content of Pb 2+ is in the range of 0～4 μg/mL. The rate of recover is 95%～105%.