【摘要】 制备了聚L-谷氨酸/铁氰根修饰电极,研究了镉离子在该修饰电极上的电化学行为,建立了一种测定痕量镉离子的新方法,该方法简便准确,检测下限可达2.5×10-9mol/L,在4×10-9～3×10-5mol/L的浓度范围内,峰电流与Cd2+的浓度呈良好的线性关系。该电极可用于测定水中镉的含量,结果令人满意。更多还原

【Abstract】 A new chemically modified GC electrode has been prepared by using polymeric L-glutamic acid/Fe(CN)63-as a modifier, the electrochemical behaviors of cadmium(Ⅱ) ion on the modified electrode have been studied. A new approach is developed for sensitive and accurate determination of cadmium by using the electrode. The peak of cadmium(Ⅱ) ion on polymeric L-glutamic acid/Fe(CN)63-/GC is proportional to concentration of cadmium(Ⅱ) ion between 4.0×10-9～3.0×10-5 mol/L. The detection limit is 2.5×10-9 mol/L. The modified electrode was used to measure cadmium in water.更多还原