二安替比林甲烷PVC膜Au(Ⅲ)离子选择电极的研制和应用

Preparation of PVC Membrane Gold (Ⅲ) Ion-Selective Electrode Based on Diantipyrylmethane-Aucl₄^- and its Application

摘要: 本文报导了新型PVC膜Au(Ⅲ)离子选择电极。电极的敏感膜由二安替比林甲烷(DAM)-AuCl₄^-缔合物(10mg)、邻苯二甲酸二丁酯(DBP)(0.2ml)、PVC粉(170mg)组成。此电极在0.5MHCl介质中对AHCl₄^-的能斯特响应范围在6×10^-7~1×10^-2M,斜率为58±1mV/PM(22℃),检测下限为3.2×10^-7M。连续使用三个月,电极的性能良好。用此种离子选择电极测定了经泡沫塑料富集分离的矿石中微量金,得到了满意的结果。

Abstract: A new PVC Au (111) ion-selective electrode is reported in this paper, The sensor membrane is composed of diantipyrylmethane (DAM)-Aucl₄^- (10 mg),dibutyl phthalate (DBP) (0.2ml), PVC (170mg). The electrode exhibited Nernstian response in the CAuCl₄^- ranging fnm 6×10^-7 to 1×10^-2M with a slope of 58±1mV/pM (22℃) in the medium 0.5M HC1. The limit of detection is 3.2×10^-7M.The electrode that is used for three months continually remained good speciality. Trace gold in ores are collected and separated by foamed plastics, and are determined by this ion-selective electrode. The satisfactory results are obtained in determination of ores.