Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34791
DC FieldValueLanguage
dc.contributor.authorZen, J.M.en_US
dc.contributor.author曾志明zh_TW
dc.contributor.authorTsai, D.M.en_US
dc.contributor.authorKumar, A.S.en_US
dc.date2003zh_TW
dc.date.accessioned2014-06-06T07:48:20Z-
dc.date.available2014-06-06T07:48:20Z-
dc.identifier.issn1040-0397zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/34791-
dc.description.abstractA silica sol-gel glass-coated ferricyanide-doped Tosflex-modified screen-printed electrode (designated as SG/FeCN-Ts/SPE) was used for the mediated oxidation of ascorbic acid in neutral pH. The sol-gel overlayer was found to stabilize the Fe(CN)(6)(3-)-Tosflex system without any foul-off and deterioration behavior through chemical interaction between the hydrophilic sites of Tosflex and oxy- and/or -hydroxy surface functional groups of silicate. The electrochemical mediation of ascorbic acid was found to follow the Michaelis-Menten kinetic pathway. The SG/FeCN-Ts/SPE was very stable for repetitive measurements by flow injection analysis at 0.3 V (vs. Ag/AgCl). A linear calibration plot was obtained for ascorbic acid determination up to 300 muM with sensitivity and detection limit (S/N = 3) of 2.85 nA/muM and 46 nM, respectively. The system also showed tolerable interference to uric acid, urea and carbohydrates and was used for the determination of ascorbic acid in human urine, clinical tablet and apple juice.en_US
dc.language.isoen_USzh_TW
dc.relationElectroanalysisen_US
dc.relation.ispartofseriesElectroanalysis, Volume 15, Issue 14, Page(s) 1171-1176.en_US
dc.subjectascorbic aciden_US
dc.subjectsol-gelen_US
dc.subjectTosflexen_US
dc.subjectscreen-printed electrodeen_US
dc.subjectamperometric determinationen_US
dc.subjectcarbon electrodesen_US
dc.subjectreaction ratesen_US
dc.titleFlow injection analysis of ascorbic acid in real samples using a highly stable chemically modified screen-printed electrodeen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1002/elan.200390143zh_TW
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.openairetypeJournal Article-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
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