摘要
在1.0 mool/L KCl的介质中,采用邻苯二甲酸二正辛酯修饰碳糊电极测定抗坏血酸(AA),抗坏血酸的浓度在9.1×10-6-3.4×10-3mol/L范围内与峰电流呈线性关系,相关系数r=0.9994,检测限5.7×10-6mol/L,并且探讨了电极过程的特性.测定了市售抗坏血酸片和橙汁中抗坏血酸的含量,结果满意.
In 1. 0 mol/L KCl, the carbon paste electrode modified by Di - n - octyl phthalate is used to determine trace ascorbic acid. The peak currents are liner relationship with ascorbic acid concentrations in the rang of 9.1×10-6-3.4 × 10-3mol/L, with correlation coefficient of 0.9994. The detection limit is 5. 7×10-6mol/L. The mechanism of the electrode has been investigated. The method has been used for the determination of trace ascorbic acid in ascorbic acid tablet and orange juice with satisfactory results.
出处
《德州学院学报》
2003年第4期57-59,共3页
Journal of Dezhou University