摘要
本实验应用MEC-12B型多功能微机电化学分析仪,采用方波电压伏安法和差分脉冲电压伏安法,以悬汞电极为工作电极,对测定水样中的镉选用何种底液以及多少通氮时间、静置时间、扫描电压有较好的线性结果进行研究.结果表明:在0.01moL/LKI和0.01moL/LNH3-NH4Cl以1:1混合溶液作底液,通氮5分钟,方波电压伏安法静置2分钟,扫描电压为-0.5v～0.1v时,差分脉冲电压伏安法静置4分钟,扫描电压为-0.6v～0.2v时,效果最好.在此条件下Cd2+(10-11–10-9moL/L)之间与峰电流有较好的线性关系.
The paper ：introduces the condition： of determining the concentration of cadmium by the model MEC-12B Multi-function Microcomputer Electrochemical Analyzer, which uses hanging mercury electrode as work electrode and the method of Square Wave Voltammetry and Differential Pulse Voltammetry： The result is in the mixture of potassiumiodine and Ammonia-Ammonia chcoride buffer solution whose concentration is 0.01molarity, and we should let Nitrogen through the mixture for 5 minutes and keep the mixture still for 2 minutes or 4 minutes, and the concentration of cadmiumion from 10^-11-10^-9 molarity with the peak circulation fit a better line.
出处
《西南民族大学学报（自然科学版）》
CAS
2007年第2期350-355,共6页
Journal of Southwest Minzu University(Natural Science Edition)
关键词
镉
最佳条件
微机电化学分析系统
伏安法
MEC-12B Multi-function Microcomputer Electrochemical Analyzer Cadmium
the best condition
voltammetrymethod
