Journal
CHROMATOGRAPHIA
Volume 83, Issue 9, Pages 1065-1073Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10337-020-03930-y
Keywords
Solid-phase microextraction; Metal-organic frameworks; Graphene oxide; Nonsteroidal anti-inflammatory drugs; Efficient extraction; Derivatization-free extraction
Funding
- National Natural Science Foundation of China [21665014]
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A composite material featuring a zirconium-based metal-organic framework and graphene oxide (Zr-MOF@GO) was synthesized by a hydrothermal method and bonded to a stainless steel wire with an inorganic binder as a solid-phase microextraction (SPME) fiber for the derivatization-free extraction and analysis of nonsteroidal anti-inflammatory drugs (NSAIDs) coupled with gas chromatography (GC). The force between the Zr-MOF@GO and NSAIDs includes coordination action, H-bonding, and pi-pi conjugation effect, which results in the better extraction performance than a commercial polyamide fiber. The developed method achieved low detection limits (0.001-0.030 mu g L-1, S/N = 3) and wide linear range (0.01-500 mu g L-1) with good linearity (R >= 0.9970). The fiber coating had a high scratch resistance, which could effectively prevent coating wear and failure due to the friction between the fiber and the casing. Combined with the high thermal and chemical stability, the loss-free service life of the coating reached at least 240 extractions. Particularly, the derivatization-free extraction technique can greatly reduce the extraction time and use of organic solvents, thus maximizing the SPME technology advantages. It is evident that the analysis method is simple, environmentally friendly, and fast for detecting NSAIDs in water with high efficiency and long service life.
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