Development of a sensitive and selective kojic acid sensor based on molecularly imprinted polymer modified electrode in the lab-on-valve system

作者：Wang Yang^*; Tang Jie; Luo Xiaoyu; Hu Xiaoya; Yang Chun; Xu Qin

来源：Talanta, 2011, 85(5): 2522-2527.

DOI：10.1016/j.talanta.2011.08.014

• Lab-on-valve
• Molecularly imprinted polymer
• o-Phenylenediamine
• Kojic acid

In this work, a kojic acid electrochemical sensor, based on a non-covalent molecularly imprinted polymer (MIP) modified electrode, had been fabricated in the lab-on-valve system. The sensitive layer was synthesized by cyclic voltammetry using o-phenylenediamine as the functional monomer and kojic acid as the template. The template molecules were then removed from the modified electrode surface by washing with NaOH solution. Differential pulse voltammetry method using ferricyanide as probe was applied as the analytical technique, after extraction of kojic acid on the electrode. Chemical and flow parameters associated with the extraction process were investigated. The response recorded with the imprinted sensor exhibited a response in a range of 0.01-0.2 mu mol L(-1) with a detection limit of 3 nmol L(-1). The interference studies showed that the MIP modified electrode had excellent selectivity. Furthermore, the proposed MIP electrode exhibited good sensitivity and low sample/reagent consumption, and the sensor could be applied to the determination kojic acid in cosmetics samples.

• 出版日期2011-10-15
• 单位扬州大学