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期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:

Yingying Wen Jinhua Li Junshen Liu Wenhui Lu Jiping Ma Lingxin Chen

Institution:

1. Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
4. University of Chinese Academy of Sciences, Beijing, 100049, China
2. School of Chemistry and Materials Science, Ludong University, Yantai, 264025, China
3. Key Laboratory of Environmental Engineering of Shandong Province, Institute of Environment & Municipal Engineering, Qingdao Technological University, Qingdao, 266033, China

Abstract:

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.

Keywords:

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