2.3. HS-SPME procedure
HS-SPME extraction was performed using a Supelco (Bellefonte,
USA) manual holder containing a fiber assembly with a 100 μmpolydimethylsiloxane
(PDMS) coating. The fiberwas conditioned in the injection
port of a gas chromatograph at 250 °C for 30 min prior to use and
blank desorption was performed.