Silica-based ionic liquid coating for 96-blade system for extraction of aminoacids from complex matrixes |
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Authors: | Fatemeh Mousavi Janusz Pawliszyn |
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Institution: | Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada |
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Abstract: | 1-Vinyl-3-octadecylimidazolium bromide ionic liquid C18VIm]Br was prepared and used for the modification of mercaptopropyl-functionalized silica (Si-MPS) through surface radical chain-transfer addition. The synthesized octadecylimidazolium-modified silica (SiImC18) was characterized by thermogravimetric analysis (TGA), infrared spectroscopy (IR), 13C NMR and 29Si NMR spectroscopy and used as an extraction phase for the automated 96-blade solid phase microextraction (SPME) system with thin-film geometry using polyacrylonitrile (PAN) glue. The new proposed extraction phase was applied for extraction of aminoacids from grape pulp, and LC–MS–MS method was developed for separation of model compounds. Extraction efficiency, reusability, linearity, limit of detection, limit of quantitation and matrix effect were evaluated. The whole process of sample preparation for the proposed method requires 270 min for 96 samples simultaneously (60 min preconditioning, 90 min extraction, 60 min desorption and 60 min for carryover step) using 96-blade SPME system. |
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Keywords: | Silica-based ionic liquid High throughput analysis LC&ndash MS/MS 96-Blade SPME Aminoacids Grape pulp |
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