title: Simultaneous determination of 3,4-dihydroxyphenylacetic acid, uric acid and ascorbic acid by poly(L-arginine)/multi-walled carbon nanotubes composite film.
abstract: The poly(L-Arginine)(PArg)-multiwalled carbon nanotubes (MWCNTs) composite film was used to modify glassy carbon electrode (GCE) to fabricate PArg/MWCNTs/GCE through electropolymerization of L-Arginine on MWCNTs/GCE. The PArg/MWCNTs/GCE exhibited high electro-catalytic activities towards the oxidation of 3,4-dihydroxyphenylacetic acid (DOPAC), uric acid (UA), and ascorbic acid (AA), and could be sensitively used for simultaneous determination of DOPAC, AA, and UA in pH 7.4 phosphate-buffered solution (PBS).The linear ranges were 7 microM to 2.7 mM for DOPAC, 3 microM to 1.2 mM for UA, and 70 microM to 1.4 mM for AA. The detection limits were 1.3 microM for DOPAC, 0.7 microM for UA and 20 microM for AA.
authors: College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors: Zhijiao
authors: Z
authors: Wu
authors: Hong
authors: H
authors: Zhao
authors: Ying
authors: Y
authors: Xue
authors: Xiangjun
authors: X
authors: Li
authors: Yujian
authors: Y
authors: He
authors: Zhuobin
authors: Z
authors: Yuan
mesh_terms: D015102:3,4-Dihydroxyphenylacetic Acid / Q000032:analysis*; D001205:Ascorbic Acid / Q000032:analysis*; D053761:Nanocomposites / Q000737:chemistry; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000737:chemistry; D010084:Oxidation-Reduction; D010455:Peptides / Q000737:chemistry; D014527:Uric Acid / Q000032:analysis*
chemical_list: D037742:Nanotubes, Carbon; D010455:Peptides; D015102:3,4-Dihydroxyphenylacetic Acid; C015462:polyarginine; D014527:Uric Acid; D001205:Ascorbic Acid