【摘要】 研究了大环镍配合物 /Nafion膜修饰电极的制备方法和修饰电极对 NO的电催化氧化性能、定量测定及抗干扰能力。NO在修饰电极上的阳极峰电位比在裸电极上降低 2 30 m V,NO浓度在 8.4× 1 0 -8～ 1 .4× 1 0 -5mol/L范围内 ,阳极峰电流与 NO的浓度呈线性关系 ,相关系数 r=0 .999,检测限为 2 .8× 1 0 -8mol/L。抗坏血酸、NO2 -和儿茶酚胺类神经递质的代谢物等不干扰测定更多还原

【Abstract】 The Nafion/nickel(Ⅱ) L macrocyclic complex modified electrode was prepared and used for determination of NO,where L was 1,8 diethyl 1,3,6,8,10,13 hexoaza 14 crown 4. The modified electrode exhibited catalytic effect on electrochemical oxidation of NO with high sensitivity and selectivity. The oxidation peak potential of NO at the modified electrode was lowered by 230mV compared with that at the bare electrode. The peak current was proportional to the concentration of NO in the range of 8.4×10 -8 ～1.4×10 -5 mol/L with correlation coefficient of 0 999 and detection limit of 2.8×10 -8 mol/L. The detection was free of the interference of some biological substances such as ascorbic acid, nitrite, dopamine and L arginine.更多还原