As regards GC conditions, the column was a capillary column fused silica SE52 (30 m x 0.25 mm i.d.; 0.25 μm film thichness). Oven temperature and carrier flow are the same used in GC analysis. Injector temperature was 250 °C.
Following MS conditions were used: transfer line at 270 °C, ionization technique, electronic impact (EI=70 eV), acquisition mass range 40-450 amu.