CAJ | 학술논문

通过自组装得方法制备了巯基乙酸修饰的金电极.在0.10 mol·L-1的磷酸盐缓冲溶液中(pH=7.0),用循环伏安法和示差脉冲伏安法研究了对苯二酚在修饰电极上的电化学行为,在相对低的电位条件下,对苯二酚显示一对氧化还原峰.在1.0×10-6mol·L-1到3.0×10-3mol·L-1浓度范围内,氧化峰电流与对苯二酚的浓度成线性关系,相关系数是0.998,检测限为4.0×10-7mol·L-1.该修饰电极在间苯二酚存在的条件下,能被用于选择性检测对苯二酚,得到了令人满意的结果.
통과자조장득방법제비료구기을산수식적금전겁.재0.10 mol·L-1적린산염완충용액중(pH=7.0),용순배복안법화시차맥충복안법연구료대분이분재수식전겁상적전화학행위,재상대저적전위조건하,대분이분현시일대양화환원봉.재1.0×10-6mol·L-1도3.0×10-3mol·L-1농도범위내,양화봉전류여대분이분적농도성선성관계,상관계수시0.998,검측한위4.0×10-7mol·L-1.해수식전겁재간분이분존재적조건하,능피용우선택성검측대분이분,득도료령인만의적결과.
The mercaptoacetic acid (MAA) modifying gold electrode was prepared by self-assembling method.The voltammetric properties of hydroquinone on the modified electrode were explored with cyclic voltammetry (CV) and differential pulse voltammetry (DPV) in a 0.10 mol·L-1 phosphate buffer solution (pH=7.0).A pair of redox waves of 1,4-hydroquinone (HQ) on the modified electrode was obtained at relative lower potentials.The anodic peak current was proportional to the concentration of HQ from 1.0×10-6mol·L-1 to 3.0×10-3mol·L-1,with a correlation coefficient 0.998.The detective limit is 4.0×10-7mol·L-1(approx.0.04ppm).The modified electrode was used for selective determination of hydroquinone in the presence of resorcinol (RC),with a satisfactory result.