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研究掺杂硫氰酸根 (SCN )的聚吡咯 (PPy)修饰电极对二价汞离子的配位富集作用 ,探讨影响修饰电极响应的各种因素和修饰电极的电化学行为 ,并对电极响应的机理进行了初步探讨。结果表明 ,在 8 0× 10 6～ 5 0× 10 8mol/L浓度范围内 ,阳极峰电流与二价汞离子的浓度成正比 ,与未经修饰的裸玻碳电极相比 ,电流响应的灵敏度得到了很大提高 ,并应用于污水中汞含量的测定。
The coordination and enrichment of divalent mercury ions with polypyrrole (PPy) modified electrode doped with thiocyanate (SCN) was studied. The factors affecting the response of the modified electrode and the electrochemical behavior of the modified electrode were investigated. The electrode response The mechanism of a preliminary discussion. The results show that the anodic peak current is proportional to the concentration of divalent mercury ions in the concentration range of 8 × 10 6 ~ 5 × 10 8 mol / L. Compared with the unmodified bare glassy carbon electrode, the sensitivity of current response Has been greatly improved, and applied to the determination of mercury in sewage.