电位溶出装置的组装及其性能测试  

Assembly and Property Test of the Potential Stripping Apparatus

作　　者：刘庆洲[1] 韩树波[1] 耿新玲 李秋菊 刘文凯 

机构地区：[1]河北科技大学(中校区)环境工程系,石家庄050018 [2]河北轻化工学院环境工程系

出　　处：《河北轻化工学院学报》1997年第2期27-29,共3页

摘　　要：利用电解仪、电位计和记录仪等组装的电位溶出装置,用于教学实验,可直观地诠释电位溶出分析法的基本原理。用该装置,Cd^(2+),In^(3+),Pb^(2+)三种离子可以同时测定,分辨能力良好。在0.5mol·L^(-1)硝酸钾底液中测定Cd^(2+)时,以旋转玻碳电极为工作电极,于-1.0V(vs·Ag/AgCl电极)预电解4min,静止溶出,Cd^(2+)浓度在5～65μg·L^(-1)内,线性回归方程y=0.375+0.85x,相关系数r=0.9997,相对标准偏差RSD=4.09％。The potential stripping apparatus was assemblied by means of an electrolytic analyzer,a potentlometer and a recorder. The basic prlnciple of potential stripping method can be explained easily through teaching experiments by this apparatus. Three ions Cd2+,In3+and Pb2+ can be determined si-multanebusly in this apparatus. In the base solution of 0. 5 mol/L KNOs ,Cd2+ was determined by way of a step of preelectrolysis and accumulation at the potential -0.0 Volt (vs. Ag/AgCl) and a following step of static stripping with a working electrode of rotating glassy carbon. The linear regression eguation was y = 0. 375 + 0,85.x,with a correlation coefficient(r) 0. 999 7 and a relative standard derivation(RSD) 4. 09% within the experimental range.

关 键 词：电位溶出法 电化学分析 溶出伏安法 

分 类 号：O657.14[理学—分析化学]