Determination of dihydroxybenzene isomers by graphene-manganese porphyrin composite electrode
QIN Hong-wei1, YAN Bin1, WANG Xin1, LIU Yan1, YOU Guo-hong2
1. College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China; 2. College of Engineering, Bohai University, Jinzhou 121013, China
Abstract: Graphene-manganese porphyrin composite materials are synthesized by π-π stacking interaction way and applied on the surface of glassy carbon electrodes.Simultaneous determination of dihydroxybenzene isomers is achieved by means of differential pulse voltammetry (DPV).The results indicate that good linear relationships exist between the checking pulse peak current intensities and the concentrations of three dihydroxybenzene isomers,respectively within a certain concentration range in the sodium acetate solution with a pH value of 5.0.The linear concentration ranges are 5.0×10-6-2.0×10-3 mol·L-1 for hydroquinone,5.0×10-6-2.0×10-3 mol·L-1 for catechol and 5×10-6-3×10-3 mol·L-1 for resorcinol.The correlation coefficients are 0.999 5,0.998 6,and 0.999 6,respectively.It is proved that this method can determine three dihydroxybenzene isomers accurately,quickly and sensitively.
秦洪伟, 闫彬, 王鑫, 刘妍, 尤国红. 石墨烯锰卟啉复合电极测定苯二酚异构体[J]. 现代化工, 2020, 40(1): 225-229.
QIN Hong-wei, YAN Bin, WANG Xin, LIU Yan, YOU Guo-hong. Determination of dihydroxybenzene isomers by graphene-manganese porphyrin composite electrode. Modern Chemical Industry, 2020, 40(1): 225-229.