双硫腙/多壁碳纳米管修饰电极差分脉冲溶出伏安法测定猪肝和猪肾中的镉(Ⅱ)  

Differential Pulse Stripping Voltammetric Determination of Cadmium(Ⅱ) in Liver and Kidney with Dithizone/Multi-Walled Carbon Nanotubes Modified Electrode

作　　者：杨玫[1] 刘佳明[1] 包晓天 马美萍[1] 葛利云[1] 陈玲玲[1] 

机构地区：[1]温州医科大学环境与公共卫生学院,温州325035

出　　处：《理化检验（化学分册）》2015年第3期365-368,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家级大学生创新创业训练计划项目(201210343006);浙江省自然科学基金项目(LY13D010006);浙江省医药卫生一般研究计划(2012KYB124);温州市科技计划项目(Y20130228);浙江省大学生科技创新项目(2014R413036)

摘　　要：采用双硫腙/多壁碳纳米管修饰电极差分脉冲溶出伏安法测定猪肝和猪肾中镉(Ⅱ)的含量。优化的试验条件如下:1 0.1mol·L-1乙酸-乙酸钠缓冲溶液(底液)的pH为6.0;2双硫腙的用量为3μL;3多壁碳纳米管的用量为10μL;4沉积时间为300s;5沉积电位为-1.2V;6平衡时间为40s。镉(Ⅱ)在一定的浓度范围内与其峰电流呈线性关系,方法的检出限(3S/N)为1.0×10-9 mol·L-1。方法应用于猪肝和猪肾样品的分析,测定值与石墨炉原子吸收光谱法测定值相符,方法的回收率在94.0%~108%之间。Differential pulse stripping voltammetry was applied to the determination of cadmium(Ⅱ)in liver and kidney using dithizone/multi-walled carbon nanotubes modified electrode.The optimized conditions were as follows:1 pH of 0.1mol·L-1 HOAc-NaOAc buffer solution(base solution):6.0;2amount of dithizone:3μL;3 amount of multi-walled carbon nanotubes:10μL;4 time of deposition:300s;5 potential of deposition:-1.2V;6time of equilibration:40s.The linear relationship between the peak currents and the concentration of cadmium(Ⅱ)was kept in definite ranges,with detection limit of 1.0×10-9 mol·L-1.The proposed method was used for the measurement of liver and kidney samples,giving results in consistency with the values obtained by GFAAS with recovery rates in the range of 94.0%-108%.

关 键 词：差分脉冲溶出伏安法 猪肝 猪肾 镉(Ⅱ) 双硫腙 多壁碳纳米管 

分 类 号：O657.1[理学—分析化学] TS251.7[理学—化学]