Quantitative Analysis of CB and CO2

The gaseous concentration of CB was evaluated using GC (Agilent 6890, USA). The temperatures of the inlet, column (HP-Innowax), and hydrogen flame ionisation detector were 250 °C, 200 °C, and 280 °C, respectively. The liquid concentration of CB was calculated using the gas–liquid partition coefficient from the gas concentration of CB according to our previous work (Chen et al. 2018 (link)). An Agilent 6890 GC (Santa Clara, CA, USA) was used to measure the concentrations of CO₂, and the temperatures of the inlet, column (HP-Plot-Q, 30 m × 320 µm × 20 µm), and thermal conductivity detector were 100 °C, 40 °C, and 180 °C, respectively.