Rapid and sensitive method for the determination of polycyclic aromatic hydrocarbons in soils using pseudo multiple reaction monitoring gas chromatography/tandem mass spectrometry

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• 作者：Dayue Shang^a ; ^{dayue.shang@ec.gc.ca" class="auth_mail} ; Marcus Kim^b ; Maxine Haberl^a
• 关键词：GC/MS/MS ; GC/MS ; Polycyclic aromatic hydrocarbons ; Rapid extraction ; Pseudo MRM ; Soil and sediment
• 刊名：Journal of Chromatography A
• 出版年：21 March, 2014
• 年：2014
• 卷：1334
• 期：Complete
• 页码：118-125
• 全文大小：1240 K

文摘

A method for the rapid determination of 18 polycyclic aromatic hydrocarbons (PAHs) in soil has been established based on a simplified solvent extraction and GC/MS/MS operated in pseudo multiple reaction monitoring mode (PMRM), a technique where the two quadrupoles mass monitor the same m/z. The PMRM approach proved superior to the classic single quadrupole technique, with enhanced sensitivity, specificity, and significant reduction in time consuming sample clean-up procedures. Trace level PAHs could be readily confirmed by their retention times and characteristic ions. The limit of quantitation in soil was observed to be 20 ng/g for 16 EPA-priority PAHs and 2 additional PAHs specific to Environment Canada. The developed method was linear over the calibration range 20-4000 ng/g in soil, with observed coefficients of determination of >0.996. Individual PAH recoveries from fortified soil were in the range 58.1 to 110.1%, with a precision between 0.3 and 4.9% RSD. The ruggedness of the method was demonstrated by the success of an inter-lab proficiency test study organized by the Canadian Association for Laboratory Accreditation. The present method was found to be applicable as a rapid, routine screening for PAH contamination in soil, with significant savings in terms of preparation time and solvent usage.