2.5. Determination of volatile organic compounds (VOCs)
FJs and KLBs were also subjected to GC/MS analysis in order to
identify the volatile organic compounds (VOCs). The extractions of
VOCs were carried out using a SPME fiber of divinylbenzene/carboxen/
polydimethylsiloxane (DVB/CAR/PDMS; Supelco, Bellefonte,
PA). Before being injected into the GC/MS apparatus, the fiber was
subjected to an exposure step (30 min at 40 C) to the headspace of and by comparing their mass spectra with those within the NIST/
EPA/NIH Mass Spectral Library database (Version 2.0d, build 2005).
Volatile compounds were expressed as mg/L. VOC determinations
were performed in triplicate for each sample.