For the determination of the retention times of the main volatile compounds, the standards of Z-3-hexen-1-ol (≥98%), 1-hexanol (≥99%), hexanal (≥97%), E-2-hexenal (≥95%) were purchased from Sigma-Aldrich (St. Louis, MO, USA). For the HS-SPME procedure, amber glass vial of 20 mL, a screw thread cap with microcenter PTFE/silicone septa and SPME manual injection kit were obtained from Restek Corporation (Bellefonte, PA, USA). For the HS-SPME procedure, an amber glass vial of 20 mL and screw thread cap with microcenter PTFE/silicone septa and SPME manual injection kit were obtained from Restek Corporation (Bellefonte, PA, USA), as were SPME fibers coated with 65 um Divinylbenzene/Polydimethylsiloxane (DVB/PDMS). A heater from Fisher Scientific and a balance from Sartorius also were used.
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