Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1602, Issue -, Pages 83-90Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2019.06.001
Keywords
Porous organic frameworks; Solid-phase microextraction; Organochlorine pesticides; Fruit samples
Funding
- National Natural Science Foundation of China [31571925, 31671930]
- Science and Technology Foundation of Hebei Agricultural University [ZD201703]
- Youth Top-Notch Talent Foundation of Hebei Provincial Universities [BJ2018024]
- Natural Science Foundation of Hebei Province [B2017204025, C2017204019]
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Triazine-based porous organic frameworks (POFs) were constructed through a Friedel-Crafts reaction of cyanuric chloride (CC) with triphenylamine (TPA) monomers. The obtained POFs (CC-TPAs) were explored as the solid-phase microextraction (SPME) fiber coatings for the extraction of the organochlorine pesticides (OCPs). It was found that the mesoporous volume of the CC-TPAs was the main factor for their SPME adsorption performance. The CC-TPA-based fiber was successfully used for the SPME of the OCPs from fruit samples (apple, peach and pear). With the help of gas chromatography-micro-electron capture detection, the CC-TPA-based SPME method showed high enrichment factors (146-456), low limits of detection (0.032-0.090 ng g(-1)), good linearity (0.11-20 ng g(-1), r(2) > 0.991) and satisfactory repeatability (relative standard deviations <10.5%) for the OCPs. The method recoveries for spiked OCPs at the concentrations of 0.5, 2.0 and 10.0 ng g(-1) in fruit samples were in the range of 86.0-114.0%, 83.5-116.5% and 81.1-118.6%, respectively. The CC-TPA coated fiber was stable enough for 100 extraction cycles without significant loss of the extraction efficiency. (C) 2019 Elsevier B.V. All rights reserved.
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