Citation: Qing Xiang ZHOU, Jun Ping XIAO, Cun Ling YE, Xin Ming WANG. Enhancement of Sensitivity for Determination of Phenols in Environmental Water Samples by Single-drop Liquid Phase Microextraction Using Ionic Liquid prior to HPLC[J]. Chinese Chemical Letters, ;2006, 17(8): 1073-1076. shu

Enhancement of Sensitivity for Determination of Phenols in Environmental Water Samples by Single-drop Liquid Phase Microextraction Using Ionic Liquid prior to HPLC

1.
School of Chemistry and Environmental Sciences, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang 453007;
2.
Department of Chemistry, University of Science and Technology Beijing, Beijing 100083;
3.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640

Received Date: 13 February 2006

Fund Project: This work was jointly supported by the Creative Talented Person’s Fund of Henan Province (High Teaching [2005]-126) and the grants from the Henan Key Laboratory for environmental pollution control.

A single-drop liquid phase micro-extraction procedure using 1-butyl-3-methylimidazolium hexafluorophosphate ([C₄MIM][PF₆]) was demonstrated for the sensitive determination of four phenols in water samples. Under the optimized conditions, the linear range of proposed medthod was excellent in the range of 0.5-100μg·L^-1,the reproducibility (RSD,n=6) were in the rang 5.4%-8.9% and detection limits(S/N=3) Were 0.3 0.3,0.5 andμg·L^-1 for 2.4-dichloro-phenol, 2-naphthol, 2-nitrophenol and 4-chlorophenol, respectively. The experimental results indicated that the effect of complex matrices natural water samples could be resolved with addition of sodium ethylene diamine tetracetate (EDTA) into the samples. Excellent spiked recoveries were achieved for these four phenols ranged from 86.2%-114.9%. All these facts demonstrated that the proposed method with merits of low cost, simplicity and easy operating would be a competitive alternative procedure for the determination of such compounds at trace level.
- 1-Butyl-3-methylimidazolium hexafluorophosphate,
- single-drop liquid phase microextraction,
- phenols
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