Journal
ANALYTICAL CHEMISTRY
Volume 80, Issue 24, Pages 9848-9851Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac801854j
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A novel modified carbon nanotube paste electrode of 2-(4oxo-3-phenyl-3,4-dihydro-quinazolinyl)-N'-phenyl-hydra-zinecarbothioamide (2PHC) was fabricated, and the electrooxidation of epinephrine (EP), norepinephrine (NE), and their mixture has been studied using electrochemical methods. The modified electrode displayed strong catalytic function for the oxidation of EP and NE and resolved the overlap voltammetric response of EP and NE into two well-defined voltammetric peaks of about 240 mV with square wave voltammetry (SWV). A linear response in the range of (5 x 10(-8))-(5.5 x 10(-4)) M with a detection limit (S/N = 3) of 9.4 nM for EP was obtained.
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