Variation of Aroma Components of Pasteurized Yogurt with Different Process Combination before and after Aging by DHS/GC-O-MS
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Published:2023-02-19
Issue:4
Volume:28
Page:1975
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ISSN:1420-3049
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Container-title:Molecules
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language:en
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Short-container-title:Molecules
Author:
Zhao Mu1, Li Hongliang2, Zhang Dongjie2, Li Jie1, Wen Rong2, Ma Hairan2, Zou Tingting1, Hou Yaqiong2, Song Huanlu1ORCID
Affiliation:
1. Laboratory of Molecular Sensory Science, Beijing Technology and Business University, No. 11, Fucheng Road, Haidian District, Beijing 100048, China 2. Inner Mongolia Mengniu Dairy (Group) Co., Ltd., Hohhot 011500, China
Abstract
Pasteurized yogurt is a healthy yogurt that can be stored in ambient temperature conditions. Dynamic headspace sampling (DHS) combined with gas chromatography-olfactory mass spectrometry (GC-O-MS), sensory evaluation, electronic nose (E-nose), and partial least squares discriminant analysis (PLS-DA) were used to analyze the flavor changes of pasteurized yogurt with different process combinations before and after aging. The results of odor profiles showed that the sensory descriptors of fermented, sweet, and sour were greatly affected by different process combinations. The results of odor-active compounds and relative odor activity value (r-OAV) showed that the combination of the production process affected the overall odor profile of pasteurized yogurt, which was consistent with the sensory evaluation results. A total of 15 odor-active compounds of 38 volatile compounds were detected in pasteurized yogurt samples. r-OAV results revealed that hexanal, (E)-2-octenal, 2-heptanone, and butanoic acid may be important odor-active compounds responsible for off-odor in aged, pasteurized yogurt samples. PLS-DA and variable importance of projection (VIP) results showed that butanoic acid, hexanal, acetoin, decanoic acid, 1-pentanol, 1-nonanal, and hexanoic acid were differential compounds that distinguish pasteurized yogurt before and after aging.
Funder
Inner Mongolia Mengniu Dairy (Group) Co., Ltd
Subject
Chemistry (miscellaneous),Analytical Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Molecular Medicine,Drug Discovery,Pharmaceutical Science
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