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在涂敷绝缘漆的碳电极上,用针尖刺穿绝缘膜,形成组合微盘电极.在铁氰化钾与亚铁氰化钾溶液体系测得电极的循环伏安曲线与理论计算曲线十分吻合.阶梯扫描伏安法测得的极限扩散电流,与亚铁氰化钾浓度和扫描速率平方根都成良好的线性关系.在氯化钾支持电解质溶液中,测得Cd(Ⅱ)的循环伏安曲线是不可逆的,Cd(Ⅱ)的还原波峰电位在-0.98V(相对于饱和甘汞电极)附近;800mV·s-1阶梯扫描速率下,在2.55×10-5～1.28×10-4mol·dm-3浓度范围内,Cd(Ⅱ)的浓度与还原波峰电流成良好的线性关系.
On the carbon electrode coated with varnish, the insulator film was punctured with a needle tip to form a composite microdisk electrode.The cyclic voltammetry curves of the electrodes measured in potassium ferricyanide and potassium ferrocyanide solutions agree well with the theoretical calculation curves. The limiting diffusion current measured by step-scan voltammetry is in good linear relationship with both the concentration of potassium ferrocyanide and the square root of the scan rate.The cyclic voltammetry of Cd (Ⅱ) was measured in potassium chloride supported electrolyte solution Is irreversible, and the reduction peak potential of Cd (Ⅱ) is near -0.98V (relative to the saturated calomel electrode); at the scan rate of 800mV · s-1, it is between 2.55 × 10-5 ~ 1.28 × 10-4mol · dm -3 concentration range, Cd (Ⅱ) concentration and reducing peak current into a good linear relationship.