【摘要】 本文研究了１８－冠－６修饰碳糊电极测定金的条件，金在０．５ｍｏｌ／ＬＨＣ１－０．００５ｍｏｌ／ＬＫＣ１底液中富集，介质交换到０．０１ｍｏｌ／ＬＨＣ１中进行测定。金（Ⅲ）浓度在０．１～１．０μｇ／ｍＬ范围内呈线性关系，相对标准偏差为９．７％，检出限为２０ｎｇ／ｍＬ。可不经预先分离直接测定矿样中的金，结果良好。并研究了Ａｕ（Ⅲ）在１８－冠－６碳糊修饰电极上的还原机理。更多还原

【Abstract】 The deterrnination of gold was studied by means of acarbon paste electrede modified with 5%(W/W)18-crown-6 by using differential pulse voltamrnetry, Goldwas preconcentrated by the modified electrode in 0.5mol/L HC1-0.05mol/L KC1 in open circuit and was deter-mined in a cell containing 0.01mol/L HC1 supportingelectrolyte.This electrode gave good linearity in the rangeof 0.1～1.0μg/mL with a detection limit of 20.0ng/mLgold.The method has been applied to determine gold ingold mineral samples and satisfactory results were ob-tained.The mechanism of electrode reaction was ex-plored.更多还原