Water (for UHPLC, supergradient) and dichloromethane (for pesticide analysis, 99.8%) were purchased from PanReac AppliChem ITW Reagents (Barcelona, Spain). Ammonium sulfate (NH 4 ) 2 SO 4 , sodium sulfate Na 2 SO 4 , and phenol (≥99.5%) were purchased from Penta Chemicals Unlimited (Prague, Czech Republic). Absolute ethanol (≥99.8%) was purchased from Honeywell (Charlotte, NC, USA) and tartaric acid (99.5%) was purchased from Sigma Aldrich (St. Louis, MO, USA).
Thirty-nine (39) reference-standard-grade pure compounds were purchased from commercial sources as follows: citronellol, decyl aldehyde, ethyl 2-methylbutyrate, ethylvanillin, 4-ethylphenol, eugenol, ethyl-caproate, ethyl-cinnamate trans, geraniol, isoamylacetate, linalool, and vanillin were purchased from Acros Organics (Geel, Belgium); ethylbutyrate, ethyl-isobutyrate, ethyl-isovalerate, hexyl-acetate, isobutyl-acetate, β-ionone, 2-phenylethyl acetate, and rose oxide were purchased from Honeywell Fluka (Charlotte NC, USA); acetovanillone, damascenone natural, 4-ethylguajacol, ethyl-caprylate, ethyl 3-hydroxybutyrate, ethyl-decanoate, ethyl-dodecanoate, guaiacol, hexanal, isoeugenol, 2-methoxy-4-vinylphenol, 2-methoxy-4-methylphenol, 3-(methylthio)propionaldehyde, 2phenylethanol, benzyl-acetate, citral, thymol, 4-vinylphenol solution, and whiskey lactone were purchased from Sigma Aldrich (St. Louis, MO, USA). The list of the standards, Chemical Abstracts Service Number (CAS Registry Number), molecular formula, purity, and company are shown in Table A1.
Thirty-nine (39) reference-standard-grade pure compounds were purchased from commercial sources as follows: citronellol, decyl aldehyde, ethyl 2-methylbutyrate, ethylvanillin, 4-ethylphenol, eugenol, ethyl-caproate, ethyl-cinnamate trans, geraniol, isoamylacetate, linalool, and vanillin were purchased from Acros Organics (Geel, Belgium); ethylbutyrate, ethyl-isobutyrate, ethyl-isovalerate, hexyl-acetate, isobutyl-acetate, β-ionone, 2-phenylethyl acetate, and rose oxide were purchased from Honeywell Fluka (Charlotte NC, USA); acetovanillone, damascenone natural, 4-ethylguajacol, ethyl-caprylate, ethyl 3-hydroxybutyrate, ethyl-decanoate, ethyl-dodecanoate, guaiacol, hexanal, isoeugenol, 2-methoxy-4-vinylphenol, 2-methoxy-4-methylphenol, 3-(methylthio)propionaldehyde, 2phenylethanol, benzyl-acetate, citral, thymol, 4-vinylphenol solution, and whiskey lactone were purchased from Sigma Aldrich (St. Louis, MO, USA). The list of the standards, Chemical Abstracts Service Number (CAS Registry Number), molecular formula, purity, and company are shown in Table A1.
