a liquid-phase microextraction based on the freezing of a deep eutectic solvent followed by HPLC-UV for sensitive determination of common pesticides in environmental water samples

Content Provider	Semantic Scholar
Author	Pirsaheb, Meghdad Fattahi, Nazir
Copyright Year	2018
Abstract	In this research, a new extraction method based on liquid-phase microextraction and the freezing of deep eutectic solvent (LPME-FDES) has been developed for the determination of common pesticides in water samples prior to their analysis by high performance liquid chromatography-ultraviolet detection (HPLCUV). In this method, a green solvent consisting of 1-octyl-3-methylimidazolium chloride and 1undecanol was used as an extraction solvent, yielding the advantages of material stability, low density, and a suitable freezing point near room temperature. Under the optimum conditions, enrichment factors and extraction recoveries are in the range of 150–180 and 75–90%, respectively. The calibration graphs are linear in the range of 0.2–500 mg L 1 and limit of detections (LODs) are in the range of 0.05–0.50 mg L . Relative standard deviation (RSD) values for intra-day and inter-day of the method based on seven replicate measurements of 200 mg L 1 of diazinon and endosulfan, 100 mg L 1 of phosalone, 50.0 mg L 1 of atrazine, desethylatrazine and deisopropylatrazine in water were in the range of 1.3–2.5% and 2.2– 3.6%, respectively. The relative recoveries of well, tap and river water samples which have been spiked with different levels of target pesticides are 97–106, 90–108 and 95–107%, respectively. The extraction methodology is simple, rapid, cheap and green since small amounts of non-toxic solvents are necessary.
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Alternate Webpage(s)	https://pubs.rsc.org/en/content/articlepdf/2018/ra/c8ra00912k
Language	English
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Content Type	Text
Resource Type	Article