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Zirconium(IV)‐based metal–organic frameworks (UiO‐67) as solid‐phase extraction adsorbents for extraction of phenoxyacetic acid herbicides from vegetables
Author(s) -
Duo Huixiao,
Wang Yuhuan,
Wang Licheng,
Lu Xiaofeng,
Liang Xiaojing
Publication year - 2018
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201800784
Subject(s) - chemistry , zirconium , adsorption , solid phase extraction , extraction (chemistry) , thermogravimetric analysis , terephthalic acid , metal organic framework , fourier transform infrared spectroscopy , nuclear chemistry , chromatography , inorganic chemistry , organic chemistry , chemical engineering , polyester , engineering
A zirconium(IV)‐based metal organic framework, composed of 4,4′‐biphenyldicarboxylic acid ligands and Zr 6 O 4 (OH) 4 clusters, was successfully fabricated. Characterizations were performed on fourier transform infrared spectroscopy, scanning electron microscopy, X‐ray diffraction, Brunauer‐Emmett‐Teller, and thermogravimetric analysis, which confirmed that it possessed large specific surface area, high pore volume, and strong acid resistant stability. Furthermore, the prepared material containing biphenyl skeleton and a large number of Zr‐O bonds, can grasp acid herbicides especially phenoxyacetic acid herbicide s with aromatic structures through π‐π interaction, hydrophobic interaction and Zr‐O‐H + bonds. Based on these advantages, a method was developed for the determination of four phenoxyacetic acid herbicide s from vegetable samples. Under the optimal conditions, wide linearities from 0.3 to 250 μg/L and low limits of detection from 0.1 to 0.5 μg/L were obtained. The intra‐ and interday relative standard deviations were 1.56‐3.92 and 5.01‐7.65%, respectively. The proposed method was applied to analyze phenoxyacetic acid herbicide s residues in the tomato, cucumber, and white gourd samples. The satisfactory recoveries (86.12–103.44%) for the spiked samples in vegetable samples were achieved which demonstrated the method was an efficient pretreatment procedure and has a potential application for the trace determination of phenoxyacetic acids from a complex matrix.