Evaluation of Volatile Compounds of “Tiger Nut Beverage” (Orxata de Xufla) Headspace by Optimized Solid-Phase Micro-Extraction

摘要

The aroma profile of “tiger nut beverage” (orxata de xufla) was investigated by headspace solid-phase micro-extraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC-MS). Polidimethilsiloxane /divinylbenzene (PDMS/DVB), carboxen/polydimethylsiloxane (CAR/ PDMS), polyacrylate (PA) and divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) fibers were tested and compared for sensitivity beyond conditions that might affect the SPME procedure, such as temperature, concentration of ions and sample volume. The SPME fiber coated with DVB/CAR/PDMS presented the most efficient extraction compounds from the headspace of the product, particularly when the volatiles were extracted at 60℃ with 2 mL of the sample volume. The addition of salt did not show any significant advantage for the qualification of the volatile fraction. Eighty-three compounds were identified or tentatively identified by GC-MS, being terpenes the most abundant group.