基于金纳米粒子的对乙酰氨基酚传感器的研究

Electrochemical Sensor for Acetaminophen Based on Gold Nanoparticles

摘要: 本文采用循环伏安法将金纳米粒子修饰在玻碳电极表面，制备了GNPs/GC修饰电极。对修饰电极进行电化学及表面形貌的表征，并通过循环伏安法和交流阻抗法研究了ACOP在GNPs/GC电极上的电化学行为。本文探讨了不同实验条件对电极性能的影响，在最优条件下，ACOP线性浓度范围分别为2.0 × 10⁻⁷~2.0 × 10⁻⁵ mol∙L⁻¹和1.4 × 10⁻⁴~3.78 × 10⁻³ mol∙L⁻¹，其检出限为3.6 × 10⁻⁸ mol∙L⁻¹(S/N = 3:1)，回收率为97.7%~101.0%。 

A kind of GNPs/GC modified electrode was prepared by electrodeposited gold nanoparticles on the surface of glassy carbon electrode based on the cyclic voltammetry. Electrochemical properties and surface morphology of the modified electrode were characterized. The electrochemical behaviors of acetaminophen (ACOP) at GNPs/GC electrode were investigated by cyclic voltammetry and electrochemical impedance spectrum (EIS). The influences of different experimental conditions on the electrode performance were discussed. Under optimal conditions, a linear relationship of ACOP concentration with peak current was obtained over the concentration range of 2.0 × 10⁻⁷ - 2.0 × 10⁻⁵ mol∙L⁻¹ and 1.4 × 10⁻⁴ - 3.78 × 10⁻³ mol∙L⁻¹, respectively. The detection limit was 3.6 × 10⁻⁸ mol∙L⁻¹ (S/N = 3:1) and the recovery was 97.7% - 101.0%.