title: Metal-organic framework UiO-67-coated fiber for the solid-phase microextraction of nitrobenzene compounds from water.
abstract: A sol-gel coating technique was applied for the preparation of a solid-phase microextraction fiber by coating the metal-organic framework UiO-67 onto a stainless-steel wire. The prepared fiber was explored for the headspace solid-phase microextraction of five nitrobenzene compounds from water samples before gas chromatography with mass spectrometric detection. The effects of the extraction temperature, extraction time, sample solution volume, salt addition, and desorption conditions on the extraction efficiency were optimized. Under the optimal conditions, the linearity was observed in the range of 0.015-12.0 μg/L for the compounds in water samples, with the correlation coefficients (r) of 0.9945-0.9987. The limits of detection of the method were 5.0-10.0 ng/L, and the recoveries of the analytes from spiked water samples for the method were in the range of 74.0-102.0%. The precision for the measurements, expressed as the relative standard deviation, was less than 11.9%.
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Xiaohuan
authors.initials: X
authors.lastname: Zang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Qingyun
authors.initials: Q
authors.lastname: Chang
authors.affiliation: Fengfan Co. Ltd, Baoding, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
keywords: Gas chromatography with mass spectrometry; Metal-organic frameworks; Nitrobenzenes; Solid-phase microextraction; Water samples