制备了乙炔黑修饰碳糊电极，通过循环伏安法研究了Hg²⁺在裸碳电极和乙炔黑修饰碳糊电极上的电化学行为。实验结果表明，Hg²⁺在乙炔黑修饰电极上有明显的氧化还原峰。同时对实验条件进行了优化，在该优化条件下，氧化峰峰电流随着Hg²⁺浓度的增加在3.0×10^-7~2.4×10^-5 mol/L范围内线性增加，检出限为2.3×10^-8 mol/L。采用标准加入法成功地检测了模拟水样当中的痕量Hg²⁺。

Acetylene black modified carbon paste electrode is prepared.Electrochemical behaviors of mercury ion on the bare carbon paste electrode and the prepared acetylene black modified carbon paste electrode are investigated by the cyclic voltammetry.It is found from experimental results that mercury ion has an obvious redox peak on the acetylene black modified carbon paste electrode.The detection conditions are optimized at the same time.Under the optimized conditions,the oxidation peak currents are proportional to mercury ion concentration in the range of 3.0×10^-7-2.4×10^-5 mol·L^-1,with a detection limit of 2.3×10^-8 mol·L^-1.The trace amounts of mercury ion in simulated water samples are successfully detected through standard addition method.

赵丽芬(1991-),女,硕士研究生,研究方向为电化学分析,2274775960@qq.com