Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles.
作者： Jidong Li , Yaqi Cai , Yali Shi , Shifen Mou , Guibin Jiang
DOI: 10.1016/J.TALANTA.2007.06.008
关键词: Analytical chemistry 、 Chemistry 、 High-performance liquid chromatography 、 Ionic liquid 、 Chromatography 、 Bromide 、 Sample preparation 、 Ionic strength 、 Detection limit 、 Solid phase extraction 、 Extraction (chemistry)
摘要: Ionic liquid mixed hemimicelles-based solid-phase extraction for the preconcentration of five phthalates in environmental water sample was investigated this paper. A comparative study on use room temperature ionic liquids (RTILs) 1-hexyl-3-methylimidazolium bromide ([C(6)mim]Br) and 1-dodecyl-3-methylimidazolium ([C(12)mim]Br)-coated silica as sorbents presented. Owing to having bigger adsorption amounts analytes [C(12)mim], Br-coated selected SPE material di-ethyl-phthalate (DEP), di-n-propyl-phthalate (DnPP), di-n-butyl-phthalate (DnBP), di-cyclohexyl-phthalate (DcHP) di-(2-ethylhexyl)-phthalate (DEHP) can be quantitatively extracted under optimal conditions. The retained cartridge were desorbed completely with 3 mL methanol (pH2). Predominant factors influencing efficiency, such RTILs concentration, pH value, strength breakthrough volume discussed. proposed method had been applied determining four samples concentration factor 600 achieved easily. Detection limits obtained ranged between 0.12 0.17 mu g/L. accuracy evaluated by recovery measurement spiked samples, good results (85-107%) relative standard deviation (R.S.D.) below 6% achieved. (C) 2007 Elsevier B.V. All rights reserved.
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