Study on the Determination of 16 Polycyclic Aromatic Hydrocarbons in Soil by Gas Chromatography-Triple Quadrupole Tandem Mass Spectrometry and Their Attenuation Patterns
In this work,a method for detecting 16 types of polycyclic aromatic hydrocarbons in soil was developed using multiple reaction monitoring via Gas Chromatography-Triple Quadrupole Tandem Mass Spectrometry(GC-MS/MS).The procedure entailed twice accelerated solvent extraction with n-hexane∶acetone(1∶1,V/V)as the solvent under the conditions of 100℃ and 10 Mpa for 5 minutes.After post-extraction,samples were purified using a rapid filter purification column and concentrated under nitrogen before GC-MS/MS analysis in MRM mode.Spike recoveries in blank matrix ranged from 77.5％to 112.2％,with relative standard deviations between 0.7％and 14.0％;and spike recoveries in actual samples varied from 79.9％to 119.4％.The detection limits of the method were between 0.01 and 0.05 μg/kg.The study also investigated the degradation patterns of high and low concentrations of polycyclic aromatic hydrocarbons in soil under various storage conditions—room temperature,refrigerated,and frozen-over a period of 150 days.The findings indicated that degradation was the fastest at room temperature,followed by refrigeration,and slowest under frozen,with lower concentrations degrading slightly faster than higher concentrations.
Polycyclic aromatic hydrocarbonsGas chromatography-triple quadrupole tandem mass spectrometryMultiple reaction monitoringMPFC-QuEChERSAttenuation pattern
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