Please use this identifier to cite or link to this item:
|標題:||Determination of theophylline in tea and drug formulation using a Nafion (R)/lead-ruthenium oxide pyrochlore chemically modified electrode||作者:||Zen, J.M.
|關鍵字:||theophylline;tea;drug formulation;chemically-modified electrode;performance liquid-chromatography;voltammetric determination;human;plasma;caffeine;metabolites;immunoassay;oxidation;urine||Project:||Talanta||期刊/報告no：:||Talanta, Volume 50, Issue 3, Page(s) 635-640.||摘要:||
Square-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.
|Appears in Collections:||化學系所|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.