4.2. GC–MS Analysis

Gas chromatography–mass spectrometry (GC–MS) analyses allowed the identification of chemical compounds present in the n-Hex and DCM sub-extracts of M. arvensis. The apparatus consisted of a Hewlett-Packard 6890 gas chromatograph equipped with an SE-30 and a selective mass detector (model 5973, Hewlett Packard). Analyses were run according to the same operating conditions previously described [42]. A capillary column 100% dimethylpolysiloxane, 30 m length, 0.25 mm in diameter and 0.25 μm film thickness was used. Analyses were performed using a programmed temperature from 60 to 280 °C and compounds were identified by comparison of their mass spectra with those present in the Wiley 138 library data of the GC–MS system.