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Ferrocenedicarboxylic acid modified carbon paste electrode: a sensor for electrocatalytic determination of hydrochlorothiazide

Content Provider	Scilit
Author	Karimi-Maleh, H. Ensafi, Ali A. Ensafi, Hamid R.
Copyright Year	2009
Description	The electrocatalytic oxidation of hydrochlorothiazide has been studied by ferrocenedicarboxylic acid modified carbon paste electrode. Cyclic voltammetry and chronoamperometry were used to investigate the suitability of ferrocenedicarboxylic acid as a mediator for the electrocatalytic oxidation of hydrochlorothiazide in aqueous solution. The oxidation of hydrochlorothiazide occurs at a potential about 300 mV less positive than with the unmodified carbon paste electrode at pH 9.0. The catalytic reaction rate constant, k h was calculated (3.38 × 10² cm³ mol-1 s-1) using chronoamperometry.Under the optimized conditions, the electrocatalytic oxidation peak current of hydrochlorothiazide showed two linear dynamic ranges with a detection limit of 0.037 µmol L-1 hydrochlorothiazide. The linear calibration ranges were between 0.08-5.8 µmol L-1 and 5.8-500.0 µmol L-1 hydrochlorothiazide using square wave voltammetric method. Finally, the proposed method was also examined as a selective, simple and precise electrochemicalsensor for the determination of hydrochlorothiazide in real samples such as drug and urine.
Related Links	http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0103-50532009000500012&lng=en&nrm=iso&tlng=en
Ending Page	887
Page Count	8
Starting Page	880
ISSN	01035053
e-ISSN	16784790
DOI	10.1590/s0103-50532009000500012
Journal	Journal of the Brazilian Chemical Society
Issue Number	5
Volume Number	20
Language	English
Publisher	FapUNIFESP (SciELO)
Publisher Date	2009-01-01
Access Restriction	Open
Subject Keyword	Journal of the Brazilian Chemical Society Ferrocenedicarboxylic Acid Hydrochlorothiazide Square Wave Voltammetry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Ferrocenedicarboxylic acid modified carbon paste electrode: a sensor for electrocatalytic determination of hydrochlorothiazide

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