标题：Cloud point extraction coupled with HPLC-UV for the determination of phthalate esters in environmental water samples
作者：WANG Ling;JIANG Gui-bin;CAI Ya-qi
作者机构：[WANG, L] School of Chemistry and Chemical Engineering, Shan Dong University, Jinan, 250100, China, State Key Laboratory of Environmental Chemistry an 更多
通讯作者地址：[Jiang, GB]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：Journal of Environmental Sciences
关键词：phthalate esters;cloud point extraction;Triton X-114;non-ionic surfactant, HPLC-UV
摘要：A method based on cloud point extraction was developed to determine phthalate esters including di-ethyl-phthalate (DEP), di-(2-ethylhexyl)-phthalate (DEHP) and di-cyclohexyl-phthalate (DCP) in environmental water samples using high-performance liquid chromatography separation and ultraviolet detection (HPLC-UV). The non-ionic surfactant Triton X-114 was chosen as extraction solvent. The parameters affecting extraction efficiency, such as concentrations of Triton X-114 and Na_2SO_4, equilibration temperature, equilibration time and centrifugation time were evaluated and optimized. Under the optimum conditions, the method can achieve preconcentration factors of 35, 88, 111 and detection of limits of 2.0, 3.8, 1.0 ng/ml for DEP, DEHP and DCP in 10-ml water sample, respectively. The proposed method was successfully applied to the determination of trace amount of phathalate esters in effluent water of the wastewater treatment plant and the lixivium of plastic fragments.