镓(Ⅲ)-芦丁体系的吸附伏安行为及其应用于镓(Ⅲ)的测定

Adsorptive Voltammetric Behaviour of Gallium (Ⅲ)-Rutin System and Its Application to the Determination of Gallium(Ⅲ).

对镓（Ⅲ）－芦丁体系在悬汞电极上的吸附伏安法作了研究，确定了电极过程。在ｐＨ５．０的ＨＡｃ－ＮａＡｃ缓冲底液中用该体系的 １．５阶微分吸咐伏安法测定镓，其线性范围是 １×１０－１０～１× １０－７ｍｏｌ／ Ｌ；检测限为７．５ × １０－１１ｍｏｌ／Ｌ。用此法测定了粮食中的镓。

A sensitive method for the voltammetric determination of trace gallium, based on the adsorption characteristics of gallium(Ⅲ) with rutin at a hanging mercury drop electrode (HMDE) is described. The experimental results showed that the detection limit and the linear range of 1. 5th order differential linear sweep voltammetry in HAc-NaAc-rutin system(pH 5 .0) for gallium were 7. 5 x 10-11 mol/L and 1 x 10-10 - 1 x 10-7 mol/L, respectively. The method has been applied to the determination of gallium in grain. The electrochemical behaviour of gallium-rutin complex at the HMDE was also investigated.