Graphene Oxide-Ionic Liquid Used As Solid-Phase Microextraction Coating For Polyphenolic Compounds` Extraction And Determination With GC-MS After On-Fiber Derivatization In Wine

Authors : Paniz TASHAKKORİ, Aylin ALTINIŞIK TAĞAÇ, Melek MERDİVAN

Pages : 411-426

Doi:10.18596/jotcsa.652794

View : 20 | Download : 7

Publication Date : 2020-06-23

Article Type : Research Paper

Abstract :We describe the use of a home-made fiber coated by graphene oxide modified by an ionic liquid having methylimidazolium cation with an amino-functional group for the extraction of polyphenolic compounds insert ignore into journalissuearticles values(P.C.s);. We then performed the determination by gas chromatography coupled with mass spectrometry after on-fiber derivatization. The authors optimized the main parameters influencing the extraction and derivatization processes. The on-fiber derivatization was employed within 15 min at 60 ºC using 20 µL of trimethylsilyl reagents. Under the optimized conditions, the calibration curves for 12 P.C.s were linear from 0.1 to 1000 µg/L, and the detection limits were between 0.02 and 0.1 µg/L. We determined the single fiber repeatability obtained for all calibration points and the fiber to fiber reproducibility for 100 µg/L to be < 14.82% and < 5.87%, respectively. The extraction efficacy of the home-made fiber due to high intermolecular and electrostatic attractions was much better than the commercial fibers. We successfully applied the method to the analysis of P.C.s in wine samples with the recoveries from 72.8 to 99.9%.
Keywords : GO APMIM NTf2 coated fiber, SPME GC MS, polyphenolic compounds, derivatization on fiber, wine sample