A new voltammetric method was developed for the simple, rapid and inexpensive determination of 8-hydroxyquinoline (8HQ) on a modified electrode obtained by the electrodeposition of 1-amino-2-naphthol-4-sulfonic acid (ANSA) on the surface of a glassy carbon (GC) electrode. The electrode interfacial properties were investigated by electrochemical impedance spectroscopy (EIS). The electrochemical response of the ANSA-GC electrode toward 8-hydroxyquinoline was investigated by the use of square wave voltammetry. The ANSA-GC modified electrode showed two linear plots with 8-hydroxyquinoline concentrations from 5 × 10⁻⁷ to 1.4 × 10⁻⁵mol dm⁻³ (R² of 0.9984) and from 1.4 × 10⁻⁵ to 4.25 × 10⁻⁴mol dm⁻³ with a correlation coefficient R² equal to 0.9967. The limit of detection was 1.6 × 10⁻⁷mol dm⁻³. The ANSA-GC modified electrode also showed excellent stability and reproducibility for up to two weeks. The analytical application of the ANSA-GC modified electrode was investigated for the determination of 8-hydroxyquinoline in a blush cosmetic product. The results in good agreement to those obtained by spectrophotometry as a standard method.

开发了一种新的伏安法，用于在修饰电极上简单，快速和廉价地测定8-羟基喹啉（8HQ），修饰电极是通过在表面上电沉积1-氨基-2-萘酚-4-磺酸（ANSA）而获得的。玻碳（GC）电极。通过电化学阻抗谱（EIS）研究了电极的界面性能。通过使用方波伏安法研究了ANSA-GC电极对8-羟基喹啉的电化学响应。ANSA-GC修饰电极显示了两个线性图，其中8-羟基喹啉浓度分别为5×10 ^-7至1.4×10 ^-5 mol dm ^-3（R ²为0.9984）和1.4×10 ^-5至4.25×10^-4 mol dm ^-3，相关系数R ²等于0.9967。检测下限为1.6×10 ^-7 mol dm ^-3。ANSA-GC修饰电极在长达两周的时间内也表现出出色的稳定性和可重复性。研究了ANSA-GC修饰电极在分析腮红化妆品中8-羟基喹啉的分析应用。结果与通过分光光度法作为标准方法获得的结果吻合良好。