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本文以镍水膜电极,测定有机溶剂-磷酸三丁酯中的镍离子。研究了电极的制备,水膜中镍离子浓度和PH值、水膜支撑材料、支持电解质对电极响应的影响。电极对3.2×10~(-4)—1.0×10~(-1)M范围内的镍离子呈能斯特响应,响应的时间为1—3分钟,响应的稳定性和重现性好。所用参比电极-Pt/(I_3-+I-)电极在多种有机溶剂中有稳定的电位。指示电极与参比电极均具有结构简单,容易制备的特点。
In this paper, nickel-water membrane electrode was used to determine nickel ion in organic solvent-tributyl phosphate. The electrode preparation, the concentration of nickel ion in the water film, the pH value, the water film support material and the supporting electrolyte on the electrode response were investigated. The nickel ions in the range of 3.2 × 10 -4 -1.0 × 10 -1 M were Nernst response time 1-3 minutes, and the stability and reproducibility of the reaction were good. The reference electrode used-Pt / (I_3- + I-) electrode has a stable potential in various organic solvents. The indicator electrode and the reference electrode have the characteristics of simple structure and easy preparation.