title: [Determination of iodide, thiocyanate and perchlorate ions in environmental water by two-dimensional ion chromatography].
abstract: A procedure for the determination of iodide, thiocyanate and perchlorate ions in environmental water by two-dimensional ion chromatography has been developed. At first the iodide, thiocyanate and perchlorate ions were separated from interfering ions by a column (IonPac AS16, 250 mm x 4 mm). The iodide ion, thiocyanate and perchlorate ions were then enriched with an enrichment column (MAC-200, 80 mm x 0.75 mm). In the 2nd-dimensional chromatography, iodide thiocyanate and perchlorate ions were separated and quantified by a capillary column (IonPac AS20 Capillary, 250 mm x 0.4 mm). The linear ranges were 0.05 -100 pg/L with correlation coefficients of 0. 999 9, and the detection limits were 0. 02 - 0.05 micro gg/L. The spiked recoveries of iodide, thiocyanate and perchlorate ions were in the range of 85.1% to 100.1%. The relative standard deviations of the recoveries were 1.7% to 4.9%.
authors.affiliation: China National Food and Safety Supervision and Inspection Center, Beijing 100094, China. linli77422@yahoo.com.cn
authors.forename: Li
authors.initials: L
authors.lastname: Lin
authors.forename: Haibo
authors.initials: H
authors.lastname: Wang
authors.forename: Yali
authors.initials: Y
authors.lastname: Shi
mesh_terms: D002852:Chromatography, Ion Exchange / Q000379:methods*; D007454:Iodides / Q000032:analysis*; D007477:Ions / Q000032:analysis; D010472:Perchlorates / Q000032:analysis*; D013861:Thiocyanates / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007454:Iodides; D007477:Ions; D010472:Perchlorates; D013861:Thiocyanates; D014874:Water Pollutants, Chemical; C031760:thiocyanate; C494474:perchlorate