5 years ago

Electrospun decyl-3-methylimidazolium mono bromate/polyamide nanofibers as solid-phase microextraction coating

In the current study, electrospun-based ionic liquid (IL) doped polyamide (PA) nanofibers were prepared and used as the coating material of solid phase microextration device in the fiber geometry. Addition of IL, decyl-3-methylimidazolium mono bromate, increased the conductivity of the PA solution facilitating the electrospining process. The scanning electron microscopy images of decyl-3-methylimidazolium mono bromated/polyamide nanofibers showed the decreased diameter of the nanofibers in the range of 35–160nm compared to the PA nanofiber. The factors affecting the structure of nanofibers (e.g. ratio of decyl-3-methylimidazolium mono bromate to PA, coating time and applied voltage) were studied. In addition, influential parameters of extraction/desorption performance such as ionic strength, extraction time, and desorption time and temperature were studied. The limit of detections and limit of quantifications were obtained in the range of 0.75–0.9 and 2–5ngL−1, respectively, demonstrating high efficiency of the prepared nanofiber. The developed method also showed good repeatability, RSD 4–9% (n =3), for the spiked aqueous solution at concentration level 150ngL−1 of chlorobenzenes, and linearity,R=0.996, in the range of 5–5000ngL−1.

Publisher URL: www.sciencedirect.com/science

DOI: S0021967317311822

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