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报道了利用辛可宁修饰碳糊电极测定铋的方法 ,在1mol/LH2SO4 溶液中 ,通过在 -1.00V电位下富集Bi3 + 后 ,在 -0.20～ +0.15V电位范围内作阳极溶出伏安法测定。在 -0.022V处有一灵敏的氧化峰 ,峰电流与Bi3 + 浓度在1.0×10-8 ～1.0×10-4 mol/L范围内成良好的线性关系 ,检出限为5.0×10-9 mol/L。其他金属离子不干扰测定。
A method for the determination of bismuth using a cinchona modified carbon paste electrode was reported. The concentration of Bi3 + in a 1 mol / LH2SO4 solution was determined by potentiometric anodic stripping voltammetry at a potential range of -0.20 to + 0.15V . There is a sensitive oxidation peak at -0.022V. The peak current has a good linear relationship with the concentration of Bi3 + in the range of 1.0 × 10-8 ~ 1.0 × 10-4 mol / L with a detection limit of 5.0 × 10-9 mol / L. Other metal ions do not interfere with the assay.