The fibre used was a polydimethylsiloxane (PDMS, 100 μm,),
which gave the richest profiles for basil and rosemary essential oils
in a previous work (López, Huerga, Batlle, & Nerín, 2006). A
6.25 cm2 sample of each functional film was incubated into 20-mL
headspace vials at 80 °C for 30 min and extracted at 80 °C for
30 min. Pre-incubation and extraction temperature and times
resulted from preliminary experiments which considered incubation
and extraction temperatures ranging from 60 to 80 °C and extraction
time ranging from 15 to 35 minutes. After extraction, the fibre was
desorbed for 5 min into the GC injector set at 270 °C in splitless
mode, the temperature of the transfer line being set at 280 °C.
The fibre used was a polydimethylsiloxane (PDMS, 100 μm,),which gave the richest profiles for basil and rosemary essential oilsin a previous work (López, Huerga, Batlle, & Nerín, 2006). A6.25 cm2 sample of each functional film was incubated into 20-mLheadspace vials at 80 °C for 30 min and extracted at 80 °C for30 min. Pre-incubation and extraction temperature and timesresulted from preliminary experiments which considered incubationand extraction temperatures ranging from 60 to 80 °C and extractiontime ranging from 15 to 35 minutes. After extraction, the fibre wasdesorbed for 5 min into the GC injector set at 270 °C in splitlessmode, the temperature of the transfer line being set at 280 °C.
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