Comparative characterization of key odorants of French fries and oils at the break-in, optimum, and degrading frying stages

•Three stages of flavor development in French fries (FFs): break-in, optimum, and degrading.•Key aroma compounds of FFs and SO were clarified by molecular sensory science.•Oxidation at TPC above 22.70% in frying oil induced rancid off-flavor. Flavor is a significant factor determining the popularity...

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Published inFood chemistry Vol. 368; p. 130581
Main Authors Xu, Lirong, Mei, Xue, Chang, Jiarui, Wu, Gangcheng, Zhang, Hui, Jin, Qingzhe, Wang, Xingguo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 30.01.2022
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Abstract •Three stages of flavor development in French fries (FFs): break-in, optimum, and degrading.•Key aroma compounds of FFs and SO were clarified by molecular sensory science.•Oxidation at TPC above 22.70% in frying oil induced rancid off-flavor. Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages—break-in, optimum, and degrading. Further, in order to distinguish the key aroma compounds in each stage, the FFs prepared in SO with total polar compounds (TPC) of 6.5% (FF7), 16.37% (FF16), and 26.5% (FF27), and their corresponding oils (SO7, SO16, SO27) were chosen for sensory-directed analysis. In the break-in stage (6.50–13.50% of TPC), the flavor of the FFs was light and undesirable due to the lower content of (E,E)-2,4-decadienal. Then at the optimum stage (15.43–22.70% of TPC), the FFs obtained a higher sensory score, mainly owing to the increase of (E,E)-2,4-decadienal with a strong, deep-fried odor. However, in the degrading stage (over 22.70% of TPC), high level of four acids (hexanoic, heptanoic, octanoic, and nonanoic acid), benzeneacetaldehyde and trans-4,5-epoxy-(E)-2-decenal resulted in flavor deterioration in FF27.
AbstractList •Three stages of flavor development in French fries (FFs): break-in, optimum, and degrading.•Key aroma compounds of FFs and SO were clarified by molecular sensory science.•Oxidation at TPC above 22.70% in frying oil induced rancid off-flavor. Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages—break-in, optimum, and degrading. Further, in order to distinguish the key aroma compounds in each stage, the FFs prepared in SO with total polar compounds (TPC) of 6.5% (FF7), 16.37% (FF16), and 26.5% (FF27), and their corresponding oils (SO7, SO16, SO27) were chosen for sensory-directed analysis. In the break-in stage (6.50–13.50% of TPC), the flavor of the FFs was light and undesirable due to the lower content of (E,E)-2,4-decadienal. Then at the optimum stage (15.43–22.70% of TPC), the FFs obtained a higher sensory score, mainly owing to the increase of (E,E)-2,4-decadienal with a strong, deep-fried odor. However, in the degrading stage (over 22.70% of TPC), high level of four acids (hexanoic, heptanoic, octanoic, and nonanoic acid), benzeneacetaldehyde and trans-4,5-epoxy-(E)-2-decenal resulted in flavor deterioration in FF27.
Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages-break-in, optimum, and degrading. Further, in order to distinguish the key aroma compounds in each stage, the FFs prepared in SO with total polar compounds (TPC) of 6.5% (FF7), 16.37% (FF16), and 26.5% (FF27), and their corresponding oils (SO7, SO16, SO27) were chosen for sensory-directed analysis. In the break-in stage (6.50-13.50% of TPC), the flavor of the FFs was light and undesirable due to the lower content of (E,E)-2,4-decadienal. Then at the optimum stage (15.43-22.70% of TPC), the FFs obtained a higher sensory score, mainly owing to the increase of (E,E)-2,4-decadienal with a strong, deep-fried odor. However, in the degrading stage (over 22.70% of TPC), high level of four acids (hexanoic, heptanoic, octanoic, and nonanoic acid), benzeneacetaldehyde and trans-4,5-epoxy-(E)-2-decenal resulted in flavor deterioration in FF27.Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages-break-in, optimum, and degrading. Further, in order to distinguish the key aroma compounds in each stage, the FFs prepared in SO with total polar compounds (TPC) of 6.5% (FF7), 16.37% (FF16), and 26.5% (FF27), and their corresponding oils (SO7, SO16, SO27) were chosen for sensory-directed analysis. In the break-in stage (6.50-13.50% of TPC), the flavor of the FFs was light and undesirable due to the lower content of (E,E)-2,4-decadienal. Then at the optimum stage (15.43-22.70% of TPC), the FFs obtained a higher sensory score, mainly owing to the increase of (E,E)-2,4-decadienal with a strong, deep-fried odor. However, in the degrading stage (over 22.70% of TPC), high level of four acids (hexanoic, heptanoic, octanoic, and nonanoic acid), benzeneacetaldehyde and trans-4,5-epoxy-(E)-2-decenal resulted in flavor deterioration in FF27.
Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages—break-in, optimum, and degrading. Further, in order to distinguish the key aroma compounds in each stage, the FFs prepared in SO with total polar compounds (TPC) of 6.5% (FF7), 16.37% (FF16), and 26.5% (FF27), and their corresponding oils (SO7, SO16, SO27) were chosen for sensory-directed analysis. In the break-in stage (6.50–13.50% of TPC), the flavor of the FFs was light and undesirable due to the lower content of (E,E)-2,4-decadienal. Then at the optimum stage (15.43–22.70% of TPC), the FFs obtained a higher sensory score, mainly owing to the increase of (E,E)-2,4-decadienal with a strong, deep-fried odor. However, in the degrading stage (over 22.70% of TPC), high level of four acids (hexanoic, heptanoic, octanoic, and nonanoic acid), benzeneacetaldehyde and trans-4,5-epoxy-(E)-2-decenal resulted in flavor deterioration in FF27.
ArticleNumber 130581
Author Wang, Xingguo
Chang, Jiarui
Wu, Gangcheng
Zhang, Hui
Jin, Qingzhe
Xu, Lirong
Mei, Xue
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Keywords FF16
FF27
TPC
Odor activity value, Aroma recombination
OAVs
Off-flavor
FFs
p-AnV
French fries
AV
FF7
SO
Frying stages
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Snippet •Three stages of flavor development in French fries (FFs): break-in, optimum, and degrading.•Key aroma compounds of FFs and SO were clarified by molecular...
Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages-break-in,...
Flavor is a significant factor determining the popularity of French fries (FFs). The frying process of soybean oil (SO) showed three obvious stages—break-in,...
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SubjectTerms flavor
food chemistry
French fries
fried foods
Frying stages
Odor activity value, Aroma recombination
odor compounds
odors
Off-flavor
pelargonic acid
soybean oil
Title Comparative characterization of key odorants of French fries and oils at the break-in, optimum, and degrading frying stages
URI https://dx.doi.org/10.1016/j.foodchem.2021.130581
https://www.proquest.com/docview/2562235793
https://www.proquest.com/docview/2661006605
Volume 368
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