DETERMINATION OF EPHEDRINE IN HUMAN URINE BY SQUARE-WAVE VOLTAMMETRY WITH A SEPIOLITE-MODIFIED CARBON-PASTE ELECTRODE

Authors
CHICHARRO M ZAPARDIEL A BERMEJO E PEREZLOPEZ JA HERNANDEZ L
Citation
M. Chicharro et al., DETERMINATION OF EPHEDRINE IN HUMAN URINE BY SQUARE-WAVE VOLTAMMETRY WITH A SEPIOLITE-MODIFIED CARBON-PASTE ELECTRODE, Analusis, 23(3), 1995, pp. 131-134
Citations number
47
Categorie Soggetti
Chemistry Analytical
Journal title
Analusis → ACNP
ISSN journal
03654877
Volume
23
Issue
3
Year of publication
1995
Pages
131 - 134
Database
ISI
SICI code
0365-4877(1995)23:3<131:DOEIHU>2.0.ZU;2-M
Abstract
An adsorptive stripping voltammetric method for determination of ephed rine with a modified carbon paste electrode with sepiolite is develope d. Square wave voltammetry was used for the electrochemical measuremen t. Adsorption of the ephedrine on the electrode surface served as a pr econcentration step and allows the determination of ephedrine in human urine in amounts lower than 45.0 mu g/ml with a detection limit of 3 mu g/ml (2 min, preconcentration time), a relative error not exceeding 7.0% and a relative standard deviation lower than 4.3% (n = 5).