Poly(pyrocatechol-3,5-disodiumsulfonate)/multi-walled carbon nanotubes composite for simultaneous determination of dopamine, ascorbic acid and uric acid.

TitlePoly(pyrocatechol-3,5-disodiumsulfonate)/multi-walled carbon nanotubes composite for simultaneous determination of dopamine, ascorbic acid and uric acid.
Publication TypeJournal Article
Year of Publication2013
AuthorsXue Y, Zhao H, Wu Z, Li X, He Y, Yuan Z
JournalJournal of nanoscience and nanotechnology
Volume13
Issue2
Pagination1563-8
Date Published2013 Feb
Abstract

A novel poly(pyrocatechol-3,5-disodiumsulfonate)/multi-walled carbon nanotubes (PPD/MWCNT) composite film modified glassy carbon electrode (GCE) was fabricated and successfully used to simultaneously determine ascorbic acid (AA), dopamine (DA) and uric acid (UA). Owing to the synergistic effects of PPD and MWCNTs, the electrochemical responses of AA, DA and UA at PPD/MWCNTs/GCE were clearly superior to those at bare GCE. Additionally, the PPD/MWCNTs composite film could reduce the potential overlap of AA, DA and UA so as to favor simultaneous determination of the three substances. Under the optimum conditions, the linear calibration curves of AA, DA and UA were obtained by differential pulse voltammetry in the range of 10-1000, 1-100 and 4-1200 microM, and the detection limits were 5, 0.5 and 0.5 microM (S/N = 3) respectively. The results showed PPD/MWCNTs/GCE possessed good reproducibility and stability, and it could be applied to determine UA in human urine with satisfying recovery by standard addition method.

DOI10.1111/tpj.12228
Alternate JournalJ Nanosci Nanotechnol