结晶紫修饰电极的制备及其对镉离子的测定  

Preparation of Crystal Violet Modified Electrode and Interfacial Recognition for Cadmium Ion

作　　者：胡文英[1] 黄汉杰 黄建辉[1] 

机构地区：[1]莆田学院环境与生物工程学院,福建莆田351100 [2]莆田市计量所,福建莆田351100

出　　处：《山西大学学报（自然科学版）》2015年第4期687-691,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(21103095);莆田市科技项目(2014S03(1));福建省质量技术监督局科技项目(FJQI2014010)

摘　　要：基于Au—S化学键的作用,在金电极表面组装L-半胱氨酸（L-Cys）,再利用结晶紫（Crystal violet）与L-半胱氨酸之间的静电作用,将结晶紫间接的组装在金电极表面,从而形成结晶紫修饰电极,利用差分脉冲伏安法将所修饰结晶紫电极对水中重金属中镉离子的测定。结果表明,在pH=8.0磷酸缓冲液中,结晶紫修饰电极对Cd2＋在0.25×10-6~1.25×10-6g/L范围内具有良好线性关系,其标准曲线：ΔI=I-I0=1 100.3C＋34.048（C的单位为10-6g/L）,相关系数R2=0.992 6,检出限为7.63×10-5g/L,并且该电极有良好的灵敏度和识别性。Based on the function of Au-S,L-cysteine was assembled on the gold electrode surface,with the electrostatic interaction between crystal violet and L-cysteine,crystal violet was indirectly assembled on the gold electrode surface,then the crystal violet modified gold electrode was formed.With the method of differential pulse voltammetry,the modified electrode was used to measure the heavy mental Cadmium Ion in the water,The results showed that in the pH 8.0phosplate buffer,the crystal violet modified electrode had a linear relationship with Cd2＋within the rang of 0.25×10-6~1.25×10-6g/L.the linear equation wasΔI=I-I0=1 100.3C＋34.048,（R2=0.992 6）,the detected limit was 7.63×10-5 g/L,and the electrode had good sensitivity and recognition.

关 键 词：金电极 修饰电极 结晶紫 镉离子 L-半胱氨酸 

分 类 号：O657.1[理学—分析化学]