超灵敏胍修饰Co(Ⅱ)-BSA络合吸附波测定痕量钴  

Determination of Trace Cobalt(Ⅱ) Using Super-Sensitive Adsorptive Wave of Guanidine Modified Co(Ⅱ)-BSA Complex

作　　者：黄金香[1] 雷建芳[1] 雷双双[1] 田军[1] 罗登柏[1] 

机构地区：[1]中南民族大学化学与材料科学学院,湖北武汉430074

出　　处：《化学与生物工程》2008年第5期69-72,共4页Chemistry & Bioengineering

基　　金：湖北省自然科学基金资助项目(2005ABA001);中南民族大学自然科学基金重点资助项目(YZY06011)

摘　　要：在0.1 mol.L^-1的NaOH介质中,胍修饰的Co（Ⅱ）-BSA于-1.70 V左右（vs.SCE）产生一个超灵敏的络合吸附波,该波一阶导数波高与Co（Ⅱ）浓度在6.8×10^-10-1.7×10^-7mol.L^-1范围内呈良好的线性关系,相关系数R=0.997,检测限可达3.0×10^-10mol.L^-1。该法具有操作简单、重现性好、灵敏度高、精密度高等特点。用于测定矿泉水和VB12药片中Co（Ⅱ）的含量,结果令人满意。An extremely sensitive adsorptive wave of Co（ Ⅱ） at about -1.70 V（vs. SCE） has been obtained sin the solution containing 10 ug ·mL^-1 BSA,0.1 mol · L^-1 guanidine hydrochloride and 0. 1 mol · L^-1 NaOH by using single sweep polarography. Its first derivative wave height shows a good linear relationship to the concentration of Co（ Ⅱ ） in the range of 6.8 × 10^-10 - 1.7 × 10^-7 mol · L^-1 , the correlation coefficient for the straight line is 0. 997,the detection limit is 3.0 × 10^-10· mol · L^-1. The method is simple,sensitive and accurate. It has been applied to the determination of Co（ Ⅱ ） content in mineral water and VB12 tablet samples with satisfactory results.

关 键 词：Co(Ⅱ) BSA 络合吸附波 

分 类 号：O657.61[理学—分析化学]