摘要
制备了2_羟基_3_(三乙胺基)丙基正癸基硫醚修饰碳糊电极,用于痕量金的测定。研究了电极的伏安特性及分析条件。在0.2mo/LKCl-HCl缓冲溶液中(pH1),Au(Ⅲ)被富集到电极表面,然后介质交换到0.2mol/LKCl-HCl空白溶液中(pH1)进行阳极溶出伏安测定,对于5min富集,Au(Ⅲ)浓度在2×10-8~1×10-6mol/L范围内呈线性关系,检出限为1×10-8mol/L,相对标准偏差5.2%,一般常见离子不干扰。
A carbon_paste electrode modified with2_hydroxyl_3_(triethylamino)propyl n_decyl sulfide(HTPDT)was prepared for the determination of trace gold.The cyclic voltammetric characteristics and the analytical conditions of the electrode were studied.The gold(Ⅲ)ion was pre_concentrated on the surface of the modified electrode in a buffer solution of0.2mol·L -1 KCl-HCl(pH1),and then determined in a cell containing0.2mol·L -1 KCl-HCl blank solution(pH1).This electrode gave good linearity in the range of2×10 -8 ~1×10 -6 mol·L -1 with a detection limit of1×10 -8 mol·L -1 .The method has been applied to the determination of gold in mineral samples,and satisfactory results were obtained.
出处
《分析测试学报》
CAS
CSCD
北大核心
2004年第4期22-24,共3页
Journal of Instrumental Analysis
基金
河南省科技资助项目(编号004031100)