Cloud point extraction coupled with HPLC-UV for the determination of phthalate esters in environmental water samples

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 detecti...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2007, Vol.19 (7), p.874-878
Main Authors: WANG, Ling, JIANG, Gui-bin, CAI, Ya-qi, HE, Bin, WANG, Ya-wei, SHEN, Da-zhong
Format: Article
Language:English
Subjects:
Chromatography, High Pressure Liquid
cloud point extraction
Environmental Monitoring
HPLC-UV
non-ionic surfactant
phthalate esters
Phthalic Acids - analysis
Polyethylene Glycols - chemistry
Sulfates - chemistry
Surface-Active Agents - chemistry
Temperature
Triton X-114
Water Pollutants, Chemical - analysis
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Summary: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.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(07)60145-4