期刊
FOOD CHEMISTRY
卷 350, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129242
关键词
Electrospinning; Nanofibers; Headspace solid-phase microextraction; Metal-organic frameworks (MOFs); Ion mobility spectrometry; Organophosphorus pesticides; Water samples; Juice samples
In this study, a PAN/Ni-MOF nanocomposite coating was synthesized and used as a novel nanosorbent for HS-SPME of OPPs DIZ and CPS followed by CD-IMS detection. The detection limits were low and the recoveries were good under the experimental conditions.
Herein, an electrospun polyacrylonitrile/nickel-based metal-organic framework nanocomposite (PAN/Ni-MOF) coating on a stainless steel wire was synthesized and employed as a novel nanosorbent for headspace solid-phase microextraction (HS-SPME) of organophosphorus pesticides (OPPs), diazinon (DIZ), and chlorpyrifos (CPS) from the diverse aqueous media followed by corona discharge ion mobility spectrometry (CD-IMS). Under the optimum experimental conditions, the calibration plots were linear in the range of 1.0-250.0 ng mL(-1) for DIZ and 0.5-300.0 ng mL(-1) for CPS with r(2) > 0.999. The detection limits (S/N = 3) were 0.3 and 0.2 ng mL(-1) for DIZ and CPS, respectively. The intra-day relative standard deviations (RSDs%) (n = 5) at the concentration levels of 20.0, 40.0, and 100.0 ng mL(-1) were <= 5.2%. To investigate the extraction efficiency, PAN/Ni-MOF was employed to analyze various juice samples, including orange, apple, and grape juices, and in three water samples where it led to good recoveries ranged between 87% and 98%.
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