Hydrothermally tailor-made chitosan fiber for micro-solid phase extraction of petroleum acids in crude oils
| Autor: | Xiao-Mei He, Yu-Qi Feng, Xiao-Li Hu, Gang-Tian Zhu, Shukui Zhu, Sheng He |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Sorbent
02 engineering and technology Solid-phase microextraction 01 natural sciences Biochemistry Chemistry Techniques Analytical Gas Chromatography-Mass Spectrometry Analytical Chemistry Chitosan chemistry.chemical_compound Adsorption Limit of Detection Solid phase extraction Fiber Solid Phase Microextraction Detection limit Chromatography Chemistry 010401 analytical chemistry Organic Chemistry Extraction (chemistry) General Medicine 021001 nanoscience & nanotechnology 0104 chemical sciences Petroleum 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Chromatography A. 1564:42-50 |
| ISSN: | 0021-9673 |
| Popis: | Tailor-made chitosan fiber was prepared via hydrothermal treatment to serve as a micro-solid phase extraction (micro-SPE) sorbent for the analysis of petroleum acids (PAs) in crude oils. Chitosan fiber, which is commercial and cheap, has a diameter of about 10 μm and a length of a few centimeters. The fibrous property of the sorbent enables the micro-SPE to deal with viscous crude oil samples because of the low back-pressure during extraction, while the abundant hydroxyl groups and amino groups on the surface of chitosan fiber can provide high density of specific sites for adsorption of PAs. Moreover, it was found that hydrothermal treatment at certain conditions could tune the surface properties of chitosan fiber, leading to significant improvement of the capacity of the fiber in adsorption of PAs. Using hydrothermally treated chitosan fiber as sorbent, the micro-SPE was applied to the determination of PAs in crude oils, with the advantages of easy-operation, rapidness and high sensitivity (the limits of detection range from 0.7 ng/g to 5.4 ng/g). Furthermore, coupled with comprehensive two dimensional gas chromatography-mass spectrometry (GC × GC MS), the treated chitosan fiber packed micro-SPE method showed a great potential for comprehensive profiling of PAs in crude oils. |
| Databáze: | OpenAIRE |
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