title: Effect of type of oil and addition of delta-tocopherol on model flavor compound stability during storage.
abstract: The objective of this study was to investigate approaches to protect selected flavor compounds from deterioration when stored in an oil matrix. An aroma compound model mixture was prepared in a medium-chain triglyceride (MCT) or sunflower oil (SfO) matrix and stored under either an ambient air or argon atmosphere containing, respectively, ca. 20 and <0.5% residual oxygen as controls or containing a natural antioxidant, delta-tocopherol (0.01%). Samples were analyzed by static headspace GC/FID to determine the stability over time of the compounds in mixture. It was found that the type of oil had the greatest effect (P < 0.01) on overall compound stability. A low-oxygen atmosphere also had a significant (P < 0.05) protective effect on the aroma compounds in both oils. The addition of delta-tocopherol generally offered little additional protection. No significant relationship could be determined between the oxidation of the lipid matrix and the loss of oxidation-sensitive thiol compounds.
authors.affiliation: Deparment Food Science and Nutrition, University of Minnesota, 1334 Eckles Avenue, St. Paul, Minnesota 55108, USA. lecle003@umn.edu
authors.forename: Segolene
authors.initials: S
authors.lastname: Leclercq
authors.forename: Gary A
authors.initials: GA
authors.lastname: Reineccius
authors.forename: Christian
authors.initials: C
authors.lastname: Milo
mesh_terms: D000975:Antioxidants / Q000008:administration & dosage*; D003931:Diacetyl / Q000032:analysis; D004042:Dietary Fats, Unsaturated / Q000032:analysis*; D004121:Dimethyl Sulfoxide / Q000032:analysis; D004355:Drug Stability; D005519:Food Preservation; D005663:Furans / Q000032:analysis; D009812:Odorants / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry; D011758:Pyrroles / Q000032:analysis; D013438:Sulfhydryl Compounds / Q000032:analysis; D000074242:Sunflower Oil; D024505:Tocopherols / Q000008:administration & dosage*; D014280:Triglycerides
chemical_list: D000975:Antioxidants; D004042:Dietary Fats, Unsaturated; D005663:Furans; D010938:Plant Oils; D011758:Pyrroles; D013438:Sulfhydryl Compounds; D000074242:Sunflower Oil; D014280:Triglycerides; C455106:furfuryl mercaptan; C479072:delta-tocopherol; D003931:Diacetyl; C096654:N-methylpyrrole; D024505:Tocopherols; D004121:Dimethyl Sulfoxide