Abstract: Fugitive gas samples were collected for 1 h at flow rate of 100 mL·min⁻¹ from 4 sampling sites located upwind and downwind of an industrial plant on the same day at 09:00, 15:00, and 20:00. The collected gas was introduced into a gas chromatography-mass spectrometer after three-stage cold trap preconcentration. The ozone-depleting substances （ODS） in the samples were separated on the J&W GASPRO column using a temperature-programmed condition, ionized by electron impact ion source, detected in selected ion monitoring mode, and quantified using the external standard method matched for carbon dioxide. It was shown that linear relationships between values of the mass concentrations and peak areas of the 30 ODS were kept in the range of 40–800 pmol·mol⁻¹, with detection limits in the range of 1.0–8.0 pmol·mol⁻¹. Test for recovery was performed by the standard addition method, giving recoveries in the range of 81.8%–114%, with RSDs （n=6） of the determined values in the range of 0.50%–14%. The proposed method was applied to the analysis of fugitive gas samples near industrial plants. No ODS were detected in samples from the upwind sampling site, while 26 ODS were detected in samples from downwind sampling sites, with detection amounts ranging from 2.8 pmol·mol⁻¹ to 518 000 pmol·mol⁻¹. Furthermore, the total ODS content increased gradually over the sampling time, with the highest values consistently observed at 20:00.