https://doi.org/10.3390/en15218092
“The confirmation of the phytochemical constituents of F. hispida EOs was performed using an Agilent gas chromatograph–mass spectrometer (GC–MS) (7890-5975C). Briefly, the chromatography conditions were as follows: chromatographic column, HP-5MS (30 m × 0.25 mm × 0.25 μm); injector temperature, 270 °C; carrier gas, helium at a flow rate of 1.10 mL/min; temperature-rising program, initial oven temperature, 60 °C, increasing by 7 °C/min to 220 °C and held stable for 6 min, and then increasing by 10 °C/min to 280 °C and held stable for 6 min. The mass spectrometer conditions were as follows: EI: 70 eV, 230 °C, the mass scan range of 20–450 Da, and an acquisition frequency of 2. The quadrupole temperature was 150 °C, and 0.5 μL samples were injected.