Deep eutectic solvent based homogeneous liquid-liquid extraction coupled with in-syringe dispersive liquid-liquid microextraction performed in narrow tube; application in extraction and preconcentration of some herbicides from tea

Journal of Separation Science
Mohammadali TorbatiMostafa Torbati

Abstract

A homogeneous liquid-liquid extraction performed in narrow tube coupled to in-syringe-dispersive liquid-liquid microextraction based on deep eutectic solvent has been developed for the extraction of six herbicides from tea samples. In this method, sodium chloride as a separation agent is filled into the narrow tube and the tea sample is placed on top of the salt. Then a mixture of deionized water and deep eutectic solvent (water miscible) is passed through the tube. In this procedure, the deep eutectic solvent is realized as tiny droplets in contact with salt. By passing the droplets from the tea layer placed on the salt layer, the analytes are extracted into them. After collecting the solvent as separated layer, it is mixed with another deep eutectic solvent (choline chloride/butyric acid) and the mixture is dispersed into deionized water placed in a syringe. After adding acetonitrile to break up the cloudy state, the collected organic phase is injected into gas chromatography-mass spectrometry. Under optimal conditions, limits of detection and quantification in the ranges of 2.6-8.4 and 9.7-29 ng/kg, respectively, were obtained. The extraction recoveries and enrichment factors in the ranges of 70-89% and 350-445 were obtained...Continue Reading

References

Apr 1, 2006·Journal of Chromatography. a·Mohammad RezaeeSana Berijani
Jun 15, 2007·Analytica Chimica Acta·Homeira EbrahimzadehShahab Shariati
Jun 13, 2017·Talanta·María J Trujillo-RodríguezJared L Anderson
Jan 3, 2018·Analytica Chimica Acta·Nathaly Reyes-GarcésJanusz Pawliszyn

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Citations

Jun 21, 2021·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Fengjie YuXijuan Tu
Sep 3, 2021·Journal of Separation Science·Sherin F HammadFotouh R Mansour

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