期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1225, 期 -, 页码 37-44出版社
ELSEVIER
DOI: 10.1016/j.chroma.2011.12.077
关键词
Organphosphorous pesticides; Keggin; Ionic liquid; Hollow fiber solid phase microextraction
资金
- Birjand University
A novel heteropolyacid-based supported ionic liquid (IL) mediated sol-gel hybrid organic-inorganic material is presented for effective use in hollow fiber solid phase microextraction (HF-SPME). We examined a Keggin-based IL that was evaluated in conjunction with sol-gel. This study shows that Keggin-based IL sol-gel generated porous morphology pro effective extraction media. The method was developed for the extraction of the organophosphortis pesticides (OPs); diazinon, fenitrothion and malathion from human hair samples. The OPs were subsequently analyzed with high performance liquid chromatography and photodiode array detection (HPLC-PDA). In the basic condition (pH 10-11), the gel growth process in the presence of IL was initiated. Afterward, this sol was injected into a polypropylene hollow fiber segment for in situ-gelation process. Parameters affecting the efficiency of HF-SPME were thoroughly investigated. Linearity was observed over a range of 0.02-50,000 mu g/g and 0.0001-25,000 ng/mL with detection limits between 0.0074-1.3000 mu g/g and 0.00034-0.84 ng/mL for the OPs in hair and aqueous matrices, respectively. The relative recoveries in the real samples, for OPs in the storekeeper hair ranged from 86 to 95.2%. (C) 2011 Elsevier B.V. All rights reserved.
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