ISI Papers With Our Products
Title: Organic solvent supported silica aerogel thin film microextraction: An efficient sample preparation method for ion mobility spectrometry
Journal: Microchemical Journal
Author: Mohammad R. Rezayat, Mohammad T. Jafari
Year: 2020
Address: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
Abstract: A hyphenated method consisting of liquid-phase microextraction and solid-phase microextraction was presented
as a sample preparation method. To that end, silica aerogel thin film microextraction prepared by electrospinning
procedure was coated by organic solvent (tetrachloromethane) and used for extraction of molinate herbicide as a
test compound. Corona discharge ionization-ion mobility spectrometry was applied as the detection system.
Some parameters affected the extraction efficiency were evaluated and optimized with the response surface
method. Under optimum conditions, the linear dynamic range was obtained 0.20–7.0 μg L 1, and the method
detection limit and limit of quantification were obtained 0.075 and 0.20 μg L 1, respectively. The relative
standard deviations of intra- and inter-day were calculated 4% and 7%, respectively, and the enrichment factor
for the spiked sample (2 μg L 1) was obtained 600. Different real samples, including tomato, apple, carrot,
agricultural wastewater, well water, river water, and drinking water samples were used for investigating the
capability of the proposed method. The relative recovery values for these samples were obtained in the range of
90–108%. The satisfactory results disclosed that the organic solvent- thin-film microextraction could be utilized
as an efficient sample preparation method for analyzing molinate in complex matrices.
Keywords: Organic solvent coating, Thin film microextraction technique, Sample preparation, Molinate, Corona discharge ionization, Ion mobility spectrometry
Application: Extraction
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URL: #https://www.sciencedirect.com/science/article/abs/pii/S0026265X20311346#