Study On The Perceptual Interaction Among Aroma Compounds In Cherry Wines

The main research contents of this thesis include: Qualitative and quantitative analysis of aroma compounds in cherry wines;determining the key aroma components;and clarifying the perceptual interaction both aroma compounds and odor notes.Five popular cherry wines were selected as research objects.The cherry wines were analyzed by GC-MS combined with GC-O.A total of 43 aroma compounds were determined.Acoording to the volatile aroma substance types and contents combined with the sensory analysis of the odor notes,the cherry wine from Yantai,Shandong Province has obvious advantages.According to the actual quantitative results in cherry wines and the threshold value of the aroma substance in the wine in the literature,the OAVs were calculated.The results showed that the OAVs of 24 aroma substances in five cherry wines were more than 1,specially,23 in W5.Therefore,W5 was taken as an example of synergistic mechanism of aroma.The 38 aroma sybstances quantified in W5 were screened by the omission test using 3-AFC.Finally,6,8 and 9 aroma compunds were selected from the esters,alcohols and other categories and had significantly affect.In particular,it was found that ethyl citrate,ethyl lactate,2-methyl butanol,(E)-oxidized linalool,5-methylfurfural and myrcene below the threshold showed significant effects in the omission test.The defect of OAV in judging the contribution of aroma was revealed.The aroma thresholds of 23 key aroma substances and 41 binary mixtures were determined by 3-AFC combined with S-curve method.The perceptual interation between binary mixtures was studied by S-curve method and OAV method.It was found that the compounds with the same functional group gradually decreased with the increase of the length of the carbon chain,and the threshold of the short carbon chain compounds were significantly higher than the long carbon chain compounds.The additive effect was found in binary mixtures when the compounds were with similar structure and linear structure;the masking effect was found between branched and linear structure.The S-curve method and the OAV method mutually verify each other in judging the percetual interaction.Further,the S-curve was used to investigate the percetual interaction between the six odor notes in cherry wine,and the effects of different concentrations on the two odor notes were studied by ?-?.The results showed that the percetual interaction effect and degree of the same ratio and different concentration points were not the same when the two odors were mixed.The S-curve method and ?-? method were mutually verified and compensensated for each other.