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

作者：Cagliero Cecilia; Ho Tien D; Zhang Cheng; Bicchi Carlo; Anderson Jared L^*

来源：Journal of Chromatography A, 2016, 1449: 2-7.

DOI：10.1016/j.chroma.2016.04.034

• Acrylamide
• Coffee
• Polymeric ionic liquids
• Solid-phase microextraction
• Gas chromatography-Mass spectrometry

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 10 mu g L-1 and achieved comparable results to the ISO method in the analysis of six coffee powder samples.

• 出版日期2016-6-3