Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2003-10-01

Journal: WATER RESEARCH

Included Journals: PubMed、EI、SCIE、Scopus

Volume: 37

Issue: 17

Page Number: 4270-4274

ISSN: 0043-1354

Key Words: ethylenediaminetetraacetic acid (EDTA); square-wave voltammetry; chitosan

Abstract: The electrochemical behavior of Fe(EDTA)(-/2-) on a chitosan-coated glassy carbon electrode (GCE) and the determining method of the EDTA species in water samples by square-wave voltammetry (SWV) have been investigated. Fe(EDTA)(-) can be adsorbed on the positively charged chitosan membrane assembled on a GCE and be reduced at a potential of -0.095 V vs. Ag/AgCl. On the chitosan-coated GCE, the cathodic stripping peak current is proportional to the concentration of EDTA after the operating parameters of SWV were optimized. The measuring range of EDTA was from 2.0 x 10(-6) to 8.0 x 10(-5) mol/L with a correlation coefficient of r = 0.998 and a detection limit of 2.0 x 10(-7) mol/L. The relative standard deviation was less than 6.4% (n = 5) and the recovery was in the range of 98-105% for the determination of practical samples. The result was consistent with that from the HPLC method. (C) 2003 Elsevier Ltd. All rights reserved.