Permeability controllable overoxidised polypyrrole film modified glassy carbon electrodes
Permeability controllable overoxidised polypyrrole film modified glassy carbon electrodes
复制标题
导磁率可控过氧化聚吡咯薄膜修饰玻碳电极
DOI：
10.1016/0003-2670(94)80162-2
复制
发表时间：
1994
影响因子：
6.2
通讯作者：
Beshen Chen
中科院分区：
文献类型：
--
作者：
Zhiqiang Gao;Minxian Zi;Beshen Chen
报道了过氧化聚吡咯(PPy)膜修饰电极的伏安研究。这些电极对阳离子多巴胺(DA)具有渗透选择性和蓄积性。排除阴离子抗坏血酸大大提高了DA测定的选择性。DA和抗坏血酸伏安响应的不同归因于膜的电荷和孔隙率。用来制备聚吡咯的掺杂量对薄膜的透过率有重要影响。考察了膜厚、预富集时间等因素对膜的影响。
A voltammetric study on overoxidised polypyrrole (PPy) film modified electrodes is reported. These electrodes show permselective and accumulative properties towards cationic dopamine (DA). The exclusion of anionic ascorbate offers substantial improvement in the selectivity of DA determination. Differences in voltammetric responses of DA and ascorbate are attributed to the charge and porosity of the film. The volume of doping ions used for PPy preparation takes an important role in the film permeability. Other factors such as film thickness and preconcentration time are also investigated.