title: Determination of ethylenediaminetetraacetic acid in sea water by solid-phase extraction and high-performance liquid chromatography.
abstract: The chelating agent EDTA is widely used, and as a result is showing up widely in the aquatic environment. Here we describe a preconcentration procedure for measuring EDTA concentration in sea water samples by HPLC. The procedure consists of forming an Fe(III) complex followed by solid-phase extraction using an activated carbon cartridge. After the preconcentration, EDTA was quantified by HPLC with ultraviolet detection (260 nm). The enrichment permitted the determination of EDTA at concentrations as low as 1 nM. Good recoveries were obtained for both brackish and full-strength sea water with high repeatability (RSD<6%). The method was applied to sea water samples taken from near the mouth of the Oyabe River in Japan.
authors: Toyama Institute of Health, 17-1 Nakataikoyama, Imizu, Japan. tomoko.kenmei@pref.toyama.lg.jp
authors: Tomoko
authors: T
authors: Kemmei
authors: Shuji
authors: S
authors: Kodama
authors: Hironori
authors: H
authors: Fujishima
authors: Atsushi
authors: A
authors: Yamamoto
authors: Yoshinori
authors: Y
authors: Inoue
authors: Kazuichi
authors: K
authors: Hayakawa
mesh_terms: D002244:Carbon / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D056831:Coordination Complexes / Q000737:chemistry; D004492:Edetic Acid / Q000032:analysis* / Q000302:isolation & purification; D005290:Ferric Compounds / Q000737:chemistry; D012623:Seawater / Q000737:chemistry*; D052616:Solid Phase Extraction; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D056831:Coordination Complexes; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; D002244:Carbon; D004492:Edetic Acid