PMBP-金属络合物极谱波行为研究——Ⅱ.铀-PMBP-甲酸体系极谱行为研究及应用

Polarographic Behaviour of UO_2^(2+) HCOOH-PMBP System and Its Analytical Application

本文研究了铀与PMBP形成络合物的极谱行为,并建立了痕量铀的极谱测定方法。该方法灵敏度高,用于地质样品分析可获得满意结果。

The uranium-PMBP complex yields a well defined reduction peak at - 0.35V (SCE) in the pH range from 1.5 to 5.5 at a dropping mercury electrode. The experimental condition has been chosen at 0.0005% PMBP in 1.5% HCOOH buffer (pH 3.7). Uranium in the range 0.005 -l.00μg/ml gives a linear calibration and the detection limit is 0.002μg/ml. Trace amounts of uranium in rocks can be determined by this method, and the relative standard deviation for 0.0055% uranium was 5.4%.