期刊
TALANTA
卷 188, 期 -, 页码 522-530出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.06.011
关键词
Polymeric ionic liquids (PIL); Solid-phase microextraction (SPME); Food analysis; Pesticides; Fruit metabolites
资金
- National Science and Engineering Research Council of Canada (NSERC) [IRCPJ 184412-15]
- Chemical Measurement and Imaging Program at the National Science Foundation [CHE-1709372]
In this work, the performances of polymeric ionic liquid (PIL) based solid-phase microextraction (SPME) coatings were assessed for applications concerning food safety and quality. Two different polymeric ionic liquid coatings, namely poly(1-4-vinylbenzyl-3-hexadecylimidazolium) bis[(trifluoromethyl)sulfonyl] imide (poly ([VBHDIM] [NTf2D, PIL 1, and N,N-didecyl-N-methyl-d-glucaminium poly(2-methyl-acrylic acid 2-[1-(3-(2-[2-(3-trifluoromethanesulfonylamino-propoxy)-ethoxy]-ethoxy)-propylamino)-vinylamino]-ethyl ester) (poly ([DDMGlu][MTFSI]), PIL 2, were evaluated. The PIL-based coatings were compared to commercially available SPME coatings in terms of their performance toward extraction of pesticides and fruit metabolites. The partition coefficients (K-fs) of the tested coatings were calculated, with PIL 1 demonstrating similar or better performance compared to the commercial coatings. Design of experiment (DoE) was applied to optimize the parameters that most influenced SPME extraction, and a quantitative method for determination of 5 organophosphorus pesticides was developed by using PIL-based coatings and commercial SPME fibers. Despite the thin layer of the sorbent coating, PIL 1 achieved limits of quantitation at the low part-per-billion level. Moreover, in a comparative investigation of analyte coverage carried out via HS-SPME-GCxGC-ToF/MS with grape homogenate as model matrix, excellent performances were observed for the PIL-based coatings toward the determination of fruit metabolites, demonstrating their capability towards broad extractive coverage of analytes characterized by various physicochemical properties.
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