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论文类型：期刊论文

发表时间：2003-10-01

发表刊物：WATER RESEARCH

收录刊物：Scopus、SCIE、EI、PubMed

卷号：37

期号：17

页面范围：4270-4274

ISSN号：0043-1354

关键字：ethylenediaminetetraacetic acid (EDTA); square-wave voltammetry; chitosan

摘要：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.