Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34895
DC FieldValueLanguage
dc.contributor.authorZen, J.M.en_US
dc.contributor.author曾志明zh_TW
dc.contributor.authorYu, T.Y.en_US
dc.contributor.authorShih, Y.en_US
dc.date1999zh_TW
dc.date.accessioned2014-06-06T07:48:30Z-
dc.date.available2014-06-06T07:48:30Z-
dc.identifier.issn0039-9140zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/34895-
dc.description.abstractSquare-wave voltammetry was used for the determination of trace amounts of theophylline in tea and drug formulation at a Nafion(R)/lead-ruthenium oxide pyrochlore chemically modified electrode. This chemically modified electrode exhibits a marked enhancement of the current response compared to a bare glassy carbon electrode. The calibration graph for the determination of theophylline was linear up to 100 mu M in 0.1 M, pH 3 phosphate solution with a detection limit (S/N = 3) of 0.1 mu M. The results of 15 successive repetitive measurement-regeneration cycles showed a relative standard deviation of 1.3% for 10 mu M theophylline indicating that the electrode renewal gives a good reproducible surface. Quantitative analysis was performed by the standard addition method for the theophylline content in commercially available tea and drug. (C) 1999 Elsevier Science B.V. All rights reserved.en_US
dc.language.isoen_USzh_TW
dc.relationTalantaen_US
dc.relation.ispartofseriesTalanta, Volume 50, Issue 3, Page(s) 635-640.en_US
dc.relation.urihttp://dx.doi.org/10.1016/s0039-9140(99)00160-5en_US
dc.subjecttheophyllineen_US
dc.subjectteaen_US
dc.subjectdrug formulationen_US
dc.subjectchemically-modified electrodeen_US
dc.subjectperformance liquid-chromatographyen_US
dc.subjectvoltammetric determinationen_US
dc.subjecthumanen_US
dc.subjectplasmaen_US
dc.subjectcaffeineen_US
dc.subjectmetabolitesen_US
dc.subjectimmunoassayen_US
dc.subjectoxidationen_US
dc.subjecturineen_US
dc.titleDetermination of theophylline in tea and drug formulation using a Nafion (R)/lead-ruthenium oxide pyrochlore chemically modified electrodeen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1016/s0039-9140(99)00160-5zh_TW
item.languageiso639-1en_US-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.openairetypeJournal Article-
item.fulltextno fulltext-
item.grantfulltextnone-
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