论文部分内容阅读
采用浸涂流延法制得ＰＶＣ膜修饰碳微电极，用 Ｋ３ Ｆｅ（ＣＮ）６的循环伏安图考察了电 极的电化学性能，并用此电极建立了环境水样中痕量汞的阳极溶出伏安法测定。在０．０６ ｍｏｌ／Ｌ ＫＳＣＮ＋ ０．０１ ｍｏｌ／Ｌ ＫＣＩ介质中，富集电位－０．８０Ｖ，搅拌富集时间 ３００ｓ，扫描电压范围 －０．２０～０．４０Ｖ，扫描速率３１４ ｍＶ／ｓ，溶出峰电流与 Ｈｇ２＋浓度在 ０．０１～ ２．０ ｍｇ／Ｌ的范围内有 良好的线性关系，本电极成本低廉、制做简单、使用方便、性能稳定，工作电位范围宽、无汞污 染，是一种可用于阳级溶出伏安法的新型电极。
The PVC membrane modified carbon microelectrode was prepared by dip-coating method. The electrochemical properties of the electrode were investigated by cyclic voltammogram of K3 Fe (CN) 6. Anodic stripping voltammetry Anfa determination. In 0.06 mol / L KSCN + 0.01 mol / L KCl medium, the enrichment potential was -0.80V, the enrichment time was 300s, the scanning voltage range was -0.20 ~ 0.40V, the scanning rate was 314 mV / s , The peak current of dissolution and the concentration of Hg2 + have a good linear relationship in the range of 0.01-2.0 mg / L. The electrode has the advantages of low cost, simple preparation, convenient use, stable performance, wide working potential range and no mercury pollution , Is a new type of electrode that can be used for the positive stripping voltammetry.