LI Guang-hui,ZHANG Zhan-yi,WANG Hao,ZHANG Chun-lin,JIANG Bin,WANG Bo-guang.Determination of Halogenated Hydrocarbons in Ambient Air by Canister Sampling-Preconcentration/Gas Chromatography- Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(08):1668-1675.
LI Guang-hui,ZHANG Zhan-yi,WANG Hao,ZHANG Chun-lin,JIANG Bin,WANG Bo-guang.Determination of Halogenated Hydrocarbons in Ambient Air by Canister Sampling-Preconcentration/Gas Chromatography- Mass Spectrometry[J].Journal of Instrumental Analysis,2025,44(08):1668-1675. DOI: 10.12452/j.fxcsxb.241027488.
Determination of Halogenated Hydrocarbons in Ambient Air by Canister Sampling-Preconcentration/Gas Chromatography- Mass Spectrometry
To accurately analyze more halogenated hydrocarbons in ambient air,an effective method for the determination of 45 halogenated hydrocarbons in ambient air was established,including hydrofluorocarbons(HFCs),ozone-depleting substances(ODS),very short-lived substances(VSLSs),new pollutants,toxic and harmful halogenated hydrocarbons. This innovative approach employs pressurized sampling with a canister,and then analysis by the preconcentrator combined with gas chromatography-mass spectrometry(GC-MS). At the same time,the analytical conditions of the preconcentrator and GC-MS were optimized to enhance the sensitivity and accuracy of the method. Results showed that the calibration c
urves for all compounds demonstrated excellent linearity within the range of 0.10-2.50 nmol·mol
-1
,with the determination coefficients(
r
2
) not less than 0.995 8. The limits of detection and quantification were in the ranges of 0.67-10.60 pmol·mol
-1
and 2.69-42.41 pmol·mol
-1
,respectively. The recoveries of spiked blank ranged from 85.1% to 115%,with the relative standard deviations(RSDs,
n
=7) between 2.2% and 9.9%. The method was applied to the determination of real samples,and a total of 43 halogenated hydrocarbons were effectively determined. This method was simple,rapid,accurate,sensitive and stable,and was suitable for the determination of halogenated hydrocarbons in ambient air.
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