title: Determination of acrylamide in brewed coffee and coffee powder using polymeric ionic liquid-based sorbent coatings in solid-phase microextraction coupled to gas chromatography-mass spectrometry.
abstract: This study describes a simple and rapid sampling method employing a polymeric ionic liquid (PIL) sorbent coating in direct immersion solid-phase microextraction (SPME) for the trace-level analysis of acrylamide in brewed coffee and coffee powder. The crosslinked PIL sorbent coating demonstrated superior sensitivity in the extraction of acrylamide compared to all commercially available SPME coatings. A spin coating method was developed to evenly distribute the PIL coating on the SPME support and reproducibly produce fibers with a large film thickness. Ninhydrin was employed as a quenching reagent during extraction to inhibit the production of interfering acrylamide. The PIL fiber produced a limit of quantitation for acrylamide of 10μgL(-1) and achieved comparable results to the ISO method in the analysis of six coffee powder samples.
authors.affiliation: Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, I-10125 Torino, Italy.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Cagliero
authors.affiliation: Department of Chemistry, Iowa State University, Ames, IA 50011 USA.
authors.forename: Tien D
authors.initials: TD
authors.lastname: Ho
authors.affiliation: Department of Chemistry, Iowa State University, Ames, IA 50011 USA.
authors.forename: Cheng
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, I-10125 Torino, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Bicchi
authors.affiliation: Department of Chemistry, Iowa State University, Ames, IA 50011 USA. Electronic address: andersoj@iastate.edu.
authors.forename: Jared L
authors.initials: JL
authors.lastname: Anderson
mesh_terms: D020106:Acrylamide / Q000032:analysis*; D040503:Coffea / Q000737:chemistry*; D003069:Coffee / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D052578:Ionic Liquids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011208:Powders; D052617:Solid Phase Microextraction / Q000379:methods
chemical_list: D003069:Coffee; D052578:Ionic Liquids; D011108:Polymers; D011208:Powders; D020106:Acrylamide
keywords: Acrylamide; Coffee; Gas chromatography–Mass spectrometry; Polymeric ionic liquids; Solid-phase microextraction