新橙皮苷二氢查尔酮的电化学行为研究

Study on the Electrochemical Behavior of Neohesperidin Dihydrochalcone

采用循环伏安法和线性扫描伏安法研究了新橙皮苷二氢查尔酮在玻碳电极上的电化学行为。在pH=4.8的醋酸/醋酸钠缓冲溶液中,新橙皮苷二氢查尔酮的循环伏安图上呈现出一对氧化还原峰,其电化学过程表现出良好的可逆性。实验结果表明,电化学过程中新橙皮苷二氢查尔酮的电子转移数n为2,参与反应的质子数也为2。新橙皮苷二氢查尔酮的还原峰峰电流与其浓度在2.8×10-7mol.L-1至3.1×10-6mol.L-1范围内呈现出良好的线性关系。对1.1×10-6mol.L-1新橙皮苷二氢查尔酮溶液连续6次测定的RSD为2.2%,检出限为1.1×10-7mol.L-1。

Cyclic voltammetry and linear sweeping voltammetry were utilized to study the electrochemical behavior of neohesperidin dihydrochalcone at glassy carbon electrode. In acetic acid/sodium acetate buffer （pH 4.8） , a couple of redox peaks were observed in the cyclic voltammogram of neohesperidin dihydrochalcone, and its electrochemical behavior at glassy carbon electrode was found to have a good reversibility. According to the experimental data, the numbers of electron transfer and proton in the electrochemical process of neohesperidin dihydroehalcone were calculated to be 2. It was observed that the reduction peak current is well rectilinear to the concentration of neohesperidin dihydrochalcone at the range of 2.8 × 10^-7 to 3.1 × 10^ -6 mol · L^-1 , and the detection limit is 1.1 × 10^ -7 mol· L^-1. The relative standard deviation （ RSD ） is 2.2 % for 1.1 × 10^-6 mol · L^-1 neohesperidin dihydrochalcone （ n = 6）.