State;
Key;
Laboratory;
of;
Electroanalytical;
Chemistry,;
Changchun;
Institute;
of;
Applied;
Chemistry,;
Chinese;
Academy;
of;
Sciences,;
Changchun;
130022,;
P.;
R.;
China;
Department;
of;
Chemistry,;
Northeast;
Normal;
University,;
Changchun;
130024,;
P.;
R.;
China;
聚乙烯吡咯烷酮; 石墨电极; 氧化电位; 抗坏血酸; 稳定剂; 磷酸盐缓冲溶液; π-π相互作用; 修饰玻碳电极;