Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1524, Issue -, Pages 57-65Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2017.10.001
Keywords
ZIF-8/poly(MMA-EGDMA) monolith; Stir bar sorptive extraction; Phytohormones; High performance liquid; chromatography-ultraviolet detection; Fruits
Funding
- National Nature Science Foundation of China [21575107, 21575108, 21675118]
- Science Fund for Creative Research Groups of NSFC [20921062]
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences [KF2010-04]
- Large-scale Instrument and Equipment Sharing Foundation of Wuhan University [LF20170799]
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In this work, zeolitic imidazolate framework-8 (ZIF-8)/poly (methyl methacrylate-ethyleneglycol dimethacrylate) (MMA-EGDMA) composite monolith was in situ synthesized on stir bar by one-pot polymerization. Compared with the neat monolith, ZIF-8/poly(MMA-EGDMA) composite monolith has larger surface area and pore volume. It also exhibits higher extraction efficiency for target phytohormones than poly(MMA-EGDMA) monolith and commercial polyethylene glycol (PEG) coated stir bar. Based on it, a method of ZIF-8/poly(MMA-EGDMA) monolith coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detection (HPLC-UV) was established for the analysis of five phytohormones in apple and pear samples. The developed method exhibited low limits of detection (0.11-0.51 mu g/L), wide linear range (0.5-500 mu g/L) and good recoveries (82.7-111%), which demonstrated good application potential of the ZIF-81monolith coated stir bar in trace analysis of organic compounds. (C) 2017 Elsevier B.V. All rights reserved.
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