Nafion化学修饰电极电位溶出法测定痕量Bi(Ⅲ)的研究

Determination of Trace Bismuth(Ⅲ) in Waters by Potentiometric Stripping Analysis with a Chemically Modified Nafion Electrode

本文提出了Nafion化学修饰电极电位溶出测定Bi^(3+)的方法,制作的电极重现性和选择性均好,灵敏度高。研究了电极的行为并用于测定水体中的痕量Bi^(3+)。相对标准偏差为2.9%,检出限为5.0×10^(10)mol/L。

The determination of bismuth(Ⅲ) by potentiometric stripping analysis with a modified Nafion electrode is described. These electrodes have good reproducibility, selectivity and high sensitivity. In this paper, the behaviour of the electrodes is studied and the electrodes have been applied to the determination of trace bismuth(Ⅲ). The variation coefficient is 2.9% and the detection limit 5.0×10^(-10) mol/L.