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The new silica-based coated SPME fiber as universal support for the confinement of ionic liquid as an extraction medium
Abstract
The new silica-based SPME fiber coating is reported for the first time as universal support purposed to confinement of ionic liquid as an extraction medium. Fiber coating was prepared by the sol-gel process, using potassium silicate (K2SiO3) as a precursor and dimethylformamide (DMF) as a pore-forming medium. The concept of synthesis assumes obtaining a solid porous material on the surface of the glass rod and, being characterized by high porosity, mechanical strength, and uniformity of shape. In the course of the research, several parameters were optimized, like the type of silica precursor, drying steps, time and temperature of aging. Properties of obtained coatings were evaluated using optical and scanning electron microscopies and thermal adsorption/desorption measurements. Finally, the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate [C2C1IM][BF4] was immobilized in silica pores of the prepared fiber. The usefulness of the obtained SPME silica-IL fibers was investigated by its utilization in model analytical procedures. Robustness of produced fibers is supported by high fiber-to-fiber reproducibility (%) as well as by a long lifetime reaching over 50 extraction/desorption cycles.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
SEPARATION AND PURIFICATION TECHNOLOGY
no. 252,
ISSN: 1383-5866 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Konieczna K., Yavir K., Kermani M., Mielewczyk-Gryń A., Kloskowski A.: The new silica-based coated SPME fiber as universal support for the confinement of ionic liquid as an extraction medium// SEPARATION AND PURIFICATION TECHNOLOGY -Vol. 252, (2020), s.117411-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.seppur.2020.117411
- Verified by:
- Gdańsk University of Technology
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