Comparison of headspace solid‐phase microextraction and solvent extraction method for the simultaneous analysis of various soil fumigants in soil or water by gas chromatography–mass spectrometry

Autor: Qiuxia Wang, Aocheng Cao, Xianli Wang, Dongdong Yan, Daqi Zhang, Bin Huang, Ouyang Canbin, Qingli Han, Wensheng Fang, Jie Liu, Xi Jin
Rok vydání: 2020
Předmět:
Zdroj: Journal of Separation Science. 43:1499-1513
ISSN: 1615-9314
1615-9306
DOI: 10.1002/jssc.201900767
Popis: The quantity of soil fumigants has increased globally that has focused attention on their environmental behavior. However, simultaneous analysis of traces of fumigant residues is often unreported because analysis methods are not readily available to measure them at low concentrations. In this study, typical solvent extraction methods were compared with headspace solid-phase microextraction methods. Both methods can be used for simultaneously measuring the concentrations of five commonly used soil fumigants in soil or water. The solvent extraction method showed acceptable recovery (76-103%) and intraday relative standard deviations (0.8-11%) for the five soil fumigants. The headspace solid-phase microextraction method also showed acceptable recovery (72-104%) and precision rates (1.3-17%) for the five soil fumigants. The solvent extraction method was more precise and more suitable for analyzing relatively high fumigant residue levels (0.05-5 μg/g) contained in multiple soil samples. The headspace solid-phase microextraction method, however, had a much lower limits of detection (0.09-2.52 μg/kg or μg/L) than the solvent extraction method (5.8-29.2 μg/kg), making headspace solid-phase microextraction most suitable for trace analysis of these fumigants. The results confirmed that the headspace solid-phase microextraction method was more convenient and sensitive for the determination of fumigants to real soil samples.
Databáze: OpenAIRE
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