Dual cloud point extraction coupled with hydrodynamic-electrokinetic two-step injection followed by micellar electrokinetic chromatography for simultaneous determination of trace phenolic estrogens in water samples

A dual cloud point extraction (dCPE) off-line enrichment procedure coupled with a hydrodynamic–electrokinetic two-step injection online enrichment technique was successfully developed for simultaneous preconcentration of trace phenolic estrogens (hexestrol, dienestrol, and diethylstilbestrol) in wat...

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Veröffentlicht in:Analytical and bioanalytical chemistry 2013-07, Vol.405 (17), p.5843-5852
Hauptverfasser: Wen, Yingying, Li, Jinhua, Liu, Junshen, Lu, Wenhui, Ma, Jiping, Chen, Lingxin
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creator Wen, Yingying
Li, Jinhua
Liu, Junshen
Lu, Wenhui
Ma, Jiping
Chen, Lingxin
description A dual cloud point extraction (dCPE) off-line enrichment procedure coupled with a hydrodynamic–electrokinetic two-step injection online enrichment technique was successfully developed for simultaneous preconcentration of trace phenolic estrogens (hexestrol, dienestrol, and diethylstilbestrol) in water samples followed by micellar electrokinetic chromatography (MEKC) analysis. Several parameters affecting the extraction and online injection conditions were optimized. Under optimal dCPE–two-step injection–MEKC conditions, detection limits of 7.9–8.9 ng/mL and good linearity in the range from 0.05 to 5 μg/mL with correlation coefficients R 2  ≥ 0.9990 were achieved. Satisfactory recoveries ranging from 83 to 108 % were obtained with lake and tap water spiked at 0.1 and 0.5 μg/mL, respectively, with relative standard deviations ( n  = 6) of 1.3–3.1 %. This method was demonstrated to be convenient, rapid, cost-effective, and environmentally benign, and could be used as an alternative to existing methods for analyzing trace residues of phenolic estrogens in water samples. Figure A dual cloud point extraction (dCPE) off-line enrichment procedure coupled with a hydrodynamic–electrokinetic two-step injection online enrichment technique was successfully developed for simultaneous preconcentration of trace phenolic estrogens in water samples followed by MEKC analysis.
doi_str_mv 10.1007/s00216-013-6989-8
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Several parameters affecting the extraction and online injection conditions were optimized. Under optimal dCPE–two-step injection–MEKC conditions, detection limits of 7.9–8.9 ng/mL and good linearity in the range from 0.05 to 5 μg/mL with correlation coefficients R 2  ≥ 0.9990 were achieved. Satisfactory recoveries ranging from 83 to 108 % were obtained with lake and tap water spiked at 0.1 and 0.5 μg/mL, respectively, with relative standard deviations ( n  = 6) of 1.3–3.1 %. This method was demonstrated to be convenient, rapid, cost-effective, and environmentally benign, and could be used as an alternative to existing methods for analyzing trace residues of phenolic estrogens in water samples. 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Figure A dual cloud point extraction (dCPE) off-line enrichment procedure coupled with a hydrodynamic–electrokinetic two-step injection online enrichment technique was successfully developed for simultaneous preconcentration of trace phenolic estrogens in water samples followed by MEKC analysis.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><pmid>23657452</pmid><doi>10.1007/s00216-013-6989-8</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record>
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subjects Analytical Chemistry
Biochemistry
Characterization and Evaluation of Materials
Chemical properties
Chemistry
Chemistry and Materials Science
Chromatography
Chromatography, Micellar Electrokinetic Capillary - instrumentation
Chromatography, Micellar Electrokinetic Capillary - methods
Correlation coefficient
Detection limits
Drinking water
Electrokinetics
Endocrine Disruptors - analysis
Endocrine Disruptors - isolation & purification
Enrichment
Estrogen
Estrogens
Estrogens - analysis
Estrogens - isolation & purification
Extraction
Extraction (Chemistry)
Food Science
Fresh Water - analysis
Hydrodynamics
Hydrofoil boats
Identification and classification
Injection
Laboratory Medicine
Liquid-Liquid Extraction - methods
Mass spectrometry
Methods
Micropollutants
Monitoring/Environmental Analysis
On-line systems
Online
Phenols
Phenols - analysis
Phenols - isolation & purification
Research Paper
Standard deviation
Surfactants
Water analysis
Water chemistry
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - isolation & purification
Water sampling
title Dual cloud point extraction coupled with hydrodynamic-electrokinetic two-step injection followed by micellar electrokinetic chromatography for simultaneous determination of trace phenolic estrogens in water samples
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