An amino-functionalized ordered mesoporous polymer as a fiber coating for solid phase microextraction of phenols prior to GC-MS analysis
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An amino-functionalized ordered mesoporous polymer (OMP-NH2) was synthesized and applied as a fiber coating for solid phase microextraction of polar phenols from environmental samples. The fiber coating was prepared by loading the OMP-NH2 powder onto a stainless steel wire through silicone gel. Combined with GC-MS, the fibers were employed to quantify trace of phenols in water through headspace-SPME. The characterization showed the OMP-NH2 to have a large specific surface area (420 m2 g−1) and good thermal stability (>400 °C). Due to its mesoporous structure and favorable interactions via hydrogen bonding and π stacking interactions with phenols, the sorbent represents a promising candidate for the separation and enrichment of polar phenols. Extraction conditions, such as temperature, extraction time, salt concentration, pH value and desorption time, were fully optimized. Under the optimized conditions, the coating exhibits an enrichment effect that is ~2–10 times better than that of a commercial polyacrylate coating. Figures of merit include (a) low limits of detection (0.05–0.16 ng L−1), (b) wide linear ranges (0.2–10,000 ng L−1), and (c) high enrichment factors (510–2272). The relative standard deviations for one fiber and fiber-to-fiber were in the range of 4.0–6.1% and 4.6–7.4%, respectively. The method was applied to the determination of phenols in water samples and gave satisfactory recoveries between 85.4 and 112.2%.
KeywordsEnvironmental analysis Amino modification Sample preparation Fiber coating Headspace extraction mode
This study was supported by the National Natural Science Foundation of China (21806148), Special Project of Land and Resources Public Welfare Industry (201211003), the Central University’s Basic Research Business Expenses Special Fund (China University of Geosciences (Wuhan) No. CUG170102; No. CUG180610) and the Open Funds of Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) under contract number ACBM2018001.
Compliance with ethical standards
Conflict of interest
The authors declare no conflict of interest.
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