Determination of residual parathion in apples based on the graphene/nano ZrO2composite film modified electrode
HU Chuanzheng， SONG Bin， XU Junhui， WANG Yazhen， HU Siqian
Hubei Key Laboratory of Industrial Fume & Dust Pollution Control/School of Chemistry and Environmental Engineering， Jianghan University， Wuhan 430056， China
Abstract：As a “Star Material”， graphene possesses excellent conductivity and high specific surface. ZrO2 particles shows good adsorption function to phosphate groups. In this paper， a nano ZrO2/graphene composite film modified electrode was fabricated to use as a parathion electrochemical sensor. Some experimental conditions， such as the concentration of the modifier， supporting electrolytes， pH of solution， accumulation time and accumulation potential， were optimized. Benefited from high conductivity of graphene and good adsorption of ZrO2， parathion electrochemical sensor exhibited short accumulation time and fast electron transfer rate at the graphene/ZrO2 modified electrode. The results of differential pulse voltammetric analysis indicated that the oxidation peak current of parathion kept good linear relationship with its concentration in the range of 0.05～30 μmol·L－1. The limit of detection is 20 nmol·L－1. It was applied to detect the residual parathion of apple samples. The result with the recovery of 99.1%～103.6% was satisfactory.
胡传正,宋 斌,徐俊晖,王亚珍,胡思前. 基于石墨烯/纳米ZrO2复合膜修饰电极测定苹果中残余对硫磷的研究[J]. 华中师范大学学报(自然科学版), 2019, 53(6): 930-936.
HU Chuanzheng,SONG Bin,XU Junhui,WANG Yazhen,HU Siqian. Determination of residual parathion in apples based on the graphene/nano ZrO2composite film modified electrode. journal1, 2019, 53(6): 930-936.
2019, Vol. 53 
