STRIPPING-VOLTAMMETRIC DETERMINATION OF SOME AMINO-ACIDS ON A CARBON-PASTE ELECTRODE MODIFIED BY CROWN-ETHERS

Authors
SHAIDAROVA LG FEDOROVA IL ULAKHOVICH NA BUDNIKOV GK
Citation
Lg. Shaidarova et al., STRIPPING-VOLTAMMETRIC DETERMINATION OF SOME AMINO-ACIDS ON A CARBON-PASTE ELECTRODE MODIFIED BY CROWN-ETHERS, Journal of analytical chemistry, 52(3), 1997, pp. 238-241
Citations number
20
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of analytical chemistry → ACNP
ISSN journal
10619348
Volume
52
Issue
3
Year of publication
1997
Pages
238 - 241
Database
ISI
SICI code
1061-9348(1997)52:3<238:SDOSAO>2.0.ZU;2-L
Abstract
A method for detecting sulfur-containing amino acids on a carbon-paste electrode modified by dibenzo-18-crown-6 or dibromodibenzo-18-crown-6 ethers is developed. The selectivity of the method is accounted for b y a specific interaction between crown ethers (modifying agents) and p rotonated amino groups of organic molecules of the analyte adsorbed by the surface of the modified electrode as a host-guest complex. The de termination limits (c(lim)) of cysteine, homocysteine, and glutathione are equal to (2-5) x 10(-8) M.