摘要
制备了邻菲口罗啉化学修饰碳糊电极，在含噻吩甲酰三氟丙酮的ＨＡｃ－ＮａＡｃ体系中，Ｃｏ（Ⅱ）离子经化学富集在电极表面上形成三元络合物．采用２．５次微分伏安法测定痕量Ｃｏ（Ⅱ）离子．Ｃｏ（Ⅱ）浓度在８．０×１０－９～７．０×１０－７ｍｏｌ·Ｌ－１范围内与阳极溶出峰峰高成良好的线性关系，检出限达１．２×１０－９ｍｏｌ·Ｌ－１．电极用于水样中钴的测定，结果令人满意．
The preparation of phen chemically modified carbon paste electrode and the electrochemical characteristic of the electrode in the system of HAc NaAc were described.Owing to the synergic effect of HTTA,the ternary complex is formed on the electrode surface.Using 2.5 order differential voltammetry and for a chemical preconcentration time of 7 min,the good linear range from 8.0×10 -9 mol·L -1 to 7.0×10 -7 mol·L -1 Cobalt(Ⅱ) is showed.The recommended procedure is applied to the determination of trace amount of cobalt in natural water.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
1998年第5期38-42,共5页
Journal of Hunan University:Natural Sciences
基金
湖南省自然科学基金
关键词
碳糊电极
三元络合物
化学修饰电极
钴
phen chemically modified carbon paste electrode,ternary complex,voltammetry
