Weiming Hua,Huan Liu,Qichao Fei,Jincheng Wu,Xiangru Wei,Matta Ebaid,Runmi Tao,Dengyong Liu,Shengmei Gai
This study aimed to explore the changes in volatile compounds in mutton during roasting in an air fryer, using solvent-assisted flavor evaporation-gas chromatography–mass spectrometry (SAFE-GC–MS) and gas chromatography-immersion mass spectrometry (GC-IMS). Significant differences in the volatile compound profiles of different samples were detected using both GC-IMS, an electronic nose and GC–MS analysis. Among them, compounds such as ( E , E )-2,4-decadienal, ( E )-2-heptenal, and octanal showed a gradual increase in concentration throughout the roasting process. This increase was likely attributed to the oxidation of oleic and linoleic acids. Additionally, the levels of glucose, ribose, and free amino acids gradually decreased, as these compounds were consumed during the Maillard reaction, which caused the formation of volatile compounds like 2,5-dimethylpyrazine, methylpyrazine, and 3-ethyl-2,5-dimethylpyrazine. This study provided valuable insights into the use of air fryers as a novel approach for enhancing the flavor of meat products.
Aroma profiles and aroma-active compounds of Sichuan vinegar, which is one of the four famous vinegars in China, were systemically analyzed by solvent-assisted flavor evaporation-gas chromatography-mass spectrometry (SAFE-GC-MS) and gas chromatography-olfactometry (GC-O). In addition, descriptive profile analysis, aroma reconstitution, and omission test were used to evaluate and compare the Sichuan modern vinegar (SMV) and Sichuan traditional vinegar (STV). A total of 99 volatile compounds were tentatively identified from the neutral and acidic fractions of both samples. Among them, 77 compounds were positively identified after comparison with their corresponding standards. Forty-two aroma-active compounds were characterized with flavor dilution (FD) factors from 1 to 6561 by aroma extract dilution assay (AEDA)-GC-O, with the highest for 2-hydroxy-3-butanone, butyrolactone, furan-2-carbaldehyde, acetic acid, and 3-oxobutan-2-yl acetate in both STV and SMV samples. Among them, 10 were identified for the first time in vinegar. Moreover, 40 aroma-active compounds were quantitatively determined, and 26 compounds exhibited their odor activity values (OAVs) larger than 1. The reconstituted solutions showed similar aroma profiles to the original samples in their characteristic aromas in terms of fruity, sweet, roasty, spicy, and woody notes but had slight differences in nutty and herbal notes.
危险品化学品经营许可证（带存储）