期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 405, 期 17, 页码 5843-5852出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-013-6989-8
关键词
Dual-cloud-point extraction; Micellar electrokinetic chromatography; Phenolic estrogen; Water samples
资金
- National Natural Science Foundation of China [21105117, 21275158, 21171085, 21107057]
- Science and Technology Development Plans of Yantai City of China [2010158]
- Natural Science Foundation of Shandong Province of China [ZR2010BQ027, ZR2010BM027]
- 100 Talents Program of the Chinese Academy of Sciences
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 mu g/mL with correlation coefficients R (2) a parts per thousand yenaEuro parts per thousand 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 mu g/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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