2.5. Identification of compounds
Compounds were identified on the basis of their RI on the DB-Wax and DB5MS columns, their mass spectra and the injection of pure standard when available. A series of n-alkanes (C10–C30) was analysed to establish RI values using the Van Den Dool and Kratz formula (Van den Dool & Kratz, 1963), which were compared with data from the literature. The mass spectra were compared with those from three databases: NIST 2.0, WILEY 138 and INRAMASS