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Journal
2013 | 11 | 10 | 1668-1673
Article title

Flow injection analysis of ethambutol in synthetic urine using a graphite-polyurethane composite electrode as an amperometric detector

Content
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EN
Abstracts
EN
Ethambutol (ETB) is a first-line antitubercular drug effective against actively growing Mycobacterium tuberculosis. Resistance of the mycobacterium to ethambutol among tuberculosis (TB) patients results from inadequate or inappropriate dosing of treatment or using low quality medication. It is therefore necessary to develop reliable methods for determining ethambutol metabolic profiles of patients at point of care for proper dosing. Herein an efficient ETB sensor device is illustrated. It consists of a graphite-polyurethane composite electrode. In order to characterise the electrochemical behaviour of ethambutol at pH = 8.0 voltammetric studies were performed. The detector was assembled in a flow injection apparatus and operated at +1.2 V (vs. Ag/AgCl(NaCl sat.)). The influence of sample volume and flow rate was studied. The linear response for the method was extended up to a 1.1 mmol L−1 ethambutol solution with a detection limit of 0.0634 mmol L−1. The reproducibility of current responses for injections of 0.7 mmol L−1 ethambutol solution was evaluated to be 5.1% (n = 30) and the analytical frequency was 161 determinations h−1. Two different samples were successfully analysed and the results were in good agreement with those obtained using capillary zone electrophoresis (CZE). [...]
Publisher

Journal
Year
Volume
11
Issue
10
Pages
1668-1673
Physical description
Dates
published
1 - 10 - 2013
online
19 - 7 - 2013
Contributors
  • Departament of Chemistry, ICE, Federal University of Juiz de Fora, 36036-330, Juiz de Fora, MG, Brazil
  • Departament of Chemistry, ICE, Federal University of Juiz de Fora, 36036-330, Juiz de Fora, MG, Brazil
author
  • Departament of Chemistry, ICE, Federal University of Juiz de Fora, 36036-330, Juiz de Fora, MG, Brazil
  • Departament of Chemistry, ICE, Federal University of Juiz de Fora, 36036-330, Juiz de Fora, MG, Brazil
author
  • Departament of Chemistry, ICE, Federal University of Juiz de Fora, 36036-330, Juiz de Fora, MG, Brazil
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0301-9
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