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Deep eutectic solvent as acceptor phase in three-phase hollow fiber liquid-phase microextraction for determination of pyrethroid insecticides from environmental water samples prior to HPLC.

In this study, a deep eutectic solvent as acceptor phase was applied in three-phase hollow fiber liquid-phase microextraction (DES-HF-LPME) for the microextraction of two pyrethroids (Permethrin as well as deltamethrin) from environmental water samples prior to HPLC-UV. The deep eutectic solvent was synthesized of tetrabutylammonium bromide/decanoic acid (ratio of 1:2) as an acceptor phase, and 1-decanol was applied as a supported liquid membrane. Some main variables affecting the extraction recoveries, comprising the types/content of extraction solvent and acceptor phase, stirring speed, sample phase pH, and extraction time, were checked out and became optimal. In optimum circumstances, the detection limits and limits of quantitation determined were 0.09-0.12 μgL-1 and 0.29-0.39 μgL-1 for deltamethrin and permethrin, respectively. The enrichment factors were 627 and 613, while the relative standard deviations (RSD%, n=5) were calculated to be 4.8% and 5.7%, for deltamethrin and permethrin, respectively. The created technique was satisfyingly assessed to ascertain the two pyrethroid poisons (permethrin and deltamethrin) in environmental water samples.