Analysis of volatile composition of siriguela (Spondias purpurea L.) by solid phase microextraction (SPME)

In order to investigate the volatile composition of the siriguela fruit (Spondias purpurea L.), the pulp of the fresh fruit was submitted to solid phase microextracton (SPME) using different fibers, divinylbenzene–carboxen–polydimethylsiloxane (DVB/CAR/PDMS), carbowax–divinylbenzene (CW/DVB), carboxen–polydimethylsiloxane (CAR/PDMS) and polydimethylsiloxane (PDMS) fibers. DVB/CAR/PDMS showed to be the more efficient qualitative and semi-quantitatively fiber in trapping these compounds. It was made possible to identify ketones, alcohols, aldehydes, esters and terpenic hydrocarbons in the headspace. The major compounds identified were hexanal, trans-2-hexenal, 3-hexen-1-ol, 2-hexen-1-ol, ethyl acetate and hexyl acetate. To have a clear picture of the retention indices of these compounds a new protocol, in which the standard hydrocarbon mixture is submitted to SPME, was developed and successfully used.