CAJ | 학술논문

利用电沉积法制备了1种[Li‐BDC]/GC修饰电极,并用循环伏安法和交流阻抗法研究了 L‐抗坏血酸(AA)在修饰电极上的电化学行为.结果表明,与裸玻碳电极相比,该修饰电极对AA具有更高的电催化活性,其氧化峰电流增大了约1.6倍.探讨了不同实验条件对电极性能的影响,在最佳实验条件下,检测 AA 药物浓度的线性范围为3.0×10-7~2.5×10-3 mol?L-1,线性相关系数为0.9990,检出限为6.0×10-8 mol?L-1(信噪比为3∶1),回收率为97.2%~100.4%.该修饰电极具有较好的稳定性和重复性,并用于维生素C片剂中AA的含量测定,结果与药典方法一致.
이용전침적법제비료1충[Li‐BDC]/GC수식전겁,병용순배복안법화교류조항법연구료 L‐항배혈산(AA)재수식전겁상적전화학행위.결과표명,여라파탄전겁상비,해수식전겁대AA구유경고적전최화활성,기양화봉전류증대료약1.6배.탐토료불동실험조건대전겁성능적영향,재최가실험조건하,검측 AA 약물농도적선성범위위3.0×10-7~2.5×10-3 mol?L-1,선성상관계수위0.9990,검출한위6.0×10-8 mol?L-1(신조비위3∶1),회수솔위97.2%~100.4%.해수식전겁구유교호적은정성화중복성,병용우유생소C편제중AA적함량측정,결과여약전방법일치.
A Lithium‐terephthalic acid (Li‐BDC ) modified glassy carbon electrode was fabricated by electrodeposition method .The electrochemical performance of L‐ascorbic acid(AA) on the modified e‐lectrode was investigated by cyclic voltammetry and electrochemical impedance spectroscopy .The ex‐perimental results showed that the [Li‐BDC]/GC electrode has a more excellent electrocatalytic ac‐tivity for the oxidation of AA than that of GC electrode .Compared with GC electrode ,the anodic peak current of AA on [Li‐BDC]/GC electrode increased about 1 .6 times .The effects of the different ex‐perimental conditions on the electrochemical behaviors of AA were explored .Under the optimum con‐ditions of preparation and experiment ,the linear calibration curve of AA was obtained in a wide range of 3 .0 × 10-7 ~2 .5 × 10-3 mol?L -1 with a correlation coefficient of 0 .9990 and the detection limit of 6 .0 × 10-8 mol?L -1 (S/N=3∶1) .The recovery was from 97 .2% to 100 .4% .The modified electrode showed a good stability and repeatability .This method can be used to determine AA in vitamin C tab‐lets with satisfactory results .