聚溴甲酚绿/碳量子点修饰电极测定木犀草素

Detection of luteolin based on polybromocresol green/carbon quantum dot modified electrode

采用循环伏安法分步聚合碳量子点和溴甲酚绿,制备聚溴甲酚绿/碳量子点修饰玻碳电极(PBG/CQDs/GCE),研究木犀草素在该修饰电极表面的电化学行为.实验结果表明,该修饰电极对木犀草素的氧化还原反应具有较强的电催化作用.在最佳实验条件下,氧化峰电流与木犀草素浓度在0.010~15.0 mol·L^-1范围内呈良好的线性关系,检测限为4.0 nmol·L^-1.使用该方法对中药胶囊中木犀草素含量进行测定的结果与高效液相色谱法结果一致.

Polybromocresol green/carbon quantum dot modified glassy carbon electrode(denoted as PBG/CQDs/GCE)is prepared by step-by-step electropolymerization to study the electrochemical behavior of luteolin on the surface of modified electrode.The results show that the modified electrode has a strong electrocatalytic effect on the redox of luteolin.Under the optimal conditions,the oxidation peak current shows a good linear relationship with the concentration of luteolin in the range of 0.010~15.0μmol·L^-1,and the detection limit is 4.0 nmol·L^-1.The method is successfully applied to the determination of luteolin in the traditional Chinese medicine Duyiwei capsule,and the results are consistent with the results of high performance liquid chromatography.