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Electrochemical preparation of poly( N ‐acetylaniline)/poly‐(4‐styrenesulfonic acid‐ co ‐maleic acid) composite film towards ascorbic acid sensing
Author(s) -
Zhou Baineng,
Wu Shouguo
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28309
Subject(s) - ascorbic acid , maleic acid , cyclic voltammetry , composite number , amperometry , detection limit , electrochemistry , nuclear chemistry , materials science , x ray photoelectron spectroscopy , buffer solution , catalysis , polymer chemistry , chemistry , analytical chemistry (journal) , chemical engineering , copolymer , chromatography , polymer , electrode , organic chemistry , composite material , food science , engineering
Poly( N ‐acetylaniline)/poly(4‐styrenesulfonic acid‐ co ‐maleic acid) (PNAANI/PSSMA) composite film was prepared by cyclic voltammetry (CV), and was characterized by FTIR and X‐ray photoelectron spectrum (XPS). The electroactivity of the composite film was high in neutral and basic solutions, and it had been used for amperometric determination of ascorbic acid (AA). Compared with pure PNAANI film, the catalytic activity of the composite film was much better. AA was detected amperometrically in sodium citrate buffer at a potential of 0.3 V (versus SCE). The response current was proportional to the concentration of ascorbic acid in the range of 4.7 × 10 −6 to 5.0 × 10 −5 M and 5.0 × 10 −5 to 2.5 × 10 −3 M , respectively, with the detection limit of 1.9 × 10 −6 mol L −1 at a signal to noise ratio 3. In addition, the stability and reusability of the composite film were performed well, and it was satisfying to be used for determination of AA in real fruit juice samples. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008