The study aims to investigate the emission of halomethanes (HMs) from weathered black shale. As potential substrates of halomethanes, a monocyclic aromatic hydrocarbons (MAHs) formed during kerogen bioweathering were indicated. Volatile organic compounds were extracted using a modified EPA Method 5021A. For analysis, gas samples were collected using a gas-tight syringe (HS, Hamilton Company, USA), or solid-phase microextraction (SPME, 65 μm, PDMS/DVB, Supelco, USA) was used. Volatile compounds were analyzed using GC–MS (Agilent GC 7890A, MS 5975c, Agilent Technologies, USA) and GC–ECD (GC 7890A, µECD, Agilent Technologies, USA), according to modified EPA Method 8260(1986). Commercial solutions of CH₃Cl (Restek, Germany), CHCl₂, and CHCl₃ (VWR Chemicals, USA), as well as the VOA Stock Mix 8260B MegaMix Calibration Mix (Restek, Germany) were used as external standards. Bituminous organic compounds extracted from black shale were analyzed by GC–MS (Agilent GC 7890A, MS 5975c). The obtained mass spectra were compared with the Wiley 3.2 database (The Wiley Registry of Mass Spectral Data, 8th Edition).
The dataset contains: list of organic compounds extracted from weathered shale rock (6 BS samples) and list of detected volatile organic compounds (GC-MS).
