MOF-199-based coatings as SPME fiber for measurement of volatile organic compounds in air samples: Optimization of in situ deposition parameters
Omarova A. Baimatova N. Kazemian H.
February 2023Elsevier Inc.
Microchemical Journal
2023#185
In this study MOF-199-based solid-phase microextraction coating was synthesized using an in situ solvothermal method on a stainless steel substrate. The effects of solvent, metal salt, chemical modulator, and batch composition on the physicochemical characteristics of the MOF-199 coating were studied. The thickness of the MOF-199 coating increased by 18% when 15.2 mmol of acetic acid was used as an additive. Using 99.9% butanol as the solvent improved homogeneity (smaller crystallite size) of the MOF coating and decreased coating thickness by 7.5 times compared to those of 75% ethanol. Using Cu(OAc)2·H2O as the metal precursor did not lead to the growth of the MOF-199 layer on stainless steel cores. Whilst the use of Cu(NO3)2·3H2O allowed to obtain 6-, 21-, 34-, 62-, 94- and 105 µm MOF-199 SPME coatings. Responses of 7 volatile organic compounds by 34-µm and 62-µm MOF-199-based fibers were 1.2–8.5 times higher than those of commercial PDMS/DVB. The method developed for the quantification of BTEX in the air was characterized by high linearity (R2 = 0.9909–0.9993), low limits of detection (0.03–0.09 μg/m3), and quantification (0.09–0.31 μg/m3), high repeatability (1.0–6.4%) and reproducibility (4.5–8.0%). The spike recoveries ranged from 73% to 108%.
Coating , In situ synthesis , Metal–organic frameworks , MOF-199 , Solid-phase microextraction (SPME) , Volatile organic compounds (VOCs)
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Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology, Center of Physical Chemical Methods of Research and Analysis, Department of Analytical, Colloid Chemistry and Technology of Rare Elements, Almaty, 050012, Kazakhstan
Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology, Department of Chemistry and Technology of Organic Substances, Natural Compounds and Polymers, Almaty, 050012, Kazakhstan
Northern Analytical Lab Services (Northern BCs Environmental Solutions Innovation Hub), University of Northern British Columbia, Prince George, BC, Canada
Chemistry Department, Faculty of Science and Engineering, University of Northern British Columbia, Canada
Al-Farabi Kazakh National University
Al-Farabi Kazakh National University
Northern Analytical Lab Services (Northern BCs Environmental Solutions Innovation Hub)
Chemistry Department
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