【作者】 毕连花； 徐琴； 郑虎祥； 唐帆； 王伟；

【Author】 Lian-Hua Bi;Qin Xu;Hu-Xiang Zheng;Fan Tang;Wei Wang;School of Chemistry and Chemical Engineering, Yangzhou University;School of Chemical and Biological Engineering, Yancheng Institute of Technology;

【机构】 扬州大学化学化工学院； 盐城工学院化学与生物工程学院；

【摘要】 <正>PDMS是一种无毒、化学惰性和生物亲和性的高分子聚合物[1]。抗坏血酸(AA)是存在于人体、水果、药物和蔬菜中的一重要的水溶性物质。本文研究了基于PDMS-Au NPs传感器对AA的电化学行为,该传感器在多次扭曲和折叠下能发生可逆变形并能保持稳定的电化学性能。在两片PDMS和聚甲基丙烯酸甲酯(PMMA)形成的"三明治"镂空结构中更多还原

【Abstract】 Polydimethylsiloxane(PDMS) is an attractive polymeric matrix due to its many favorable properties such as nontoxic and biocompatibility [1]. Ascorbic acid(AA) is a vital water-soluble substance in human bodies. In this article, we reported a flexible poly(dimethylsioxane)-based gold electrode for ascorbic acid detection. Our self-made PDMS-based gold electrode was used to construct an amperometric sensor for AA as shown in Fig 1. Current-time response curves were observed at 0.4 V with subsequent spiking of 0.1 m M AA in 0.1 M HAc-Na Ac(p H 4.5). The linear relationship between catalytic current and concentration was observed in the range of 0.023-7.00 m M and 30-100 m M, with the detection limit of 0.008 m M. This electrode determine ascorbic acid content in commercial vitamin C tablets, we got the concentration of vitamin C per tablet was 0.09817 g. L-1(5 measurements, RSD 1.3%) which was consistent with labeled content(0.1 g L-1).更多还原