二安替比林甲烷PVC膜Au(Ⅲ)離子選擇電極的研制和應用

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

摘要: 本文報導了新型PVC膜Au(Ⅲ)離子選擇電極。電極的敏感膜由二安替比林甲烷(DAM)-AuCl₄^-締合物(10mg)、鄰苯二甲酸二丁酯(DBP)(0.2ml)、PVC粉(170mg)組成。此電極在0.5MHCl介質中對AHCl₄^-的能斯特響應范圍在6×10^-7~1×10^-2M,斜率為58±1mV/PM(22℃),檢測下限為3.2×10^-7M。連續使用三個月,電極的性能良好。用此種離子選擇電極測定了經泡沫塑料富集分離的礦石中微量金,得到了滿意的結果。

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.