To investigate the quality and flavor evolution of mint-fried pork ribs during storage, this study evaluated samples stored at -18 ℃ for 0, 20, 40, 60, 80, and 100 days by measuring color parameters (L*, a*, b*), pH, moisture content, total viable count, thiobarbituric acid value (TBA), acid value (AV), peroxide value (POV), as well as water migration and distribution.Volatile compounds were analyzed using headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry.Key aroma compounds were identified based on relative odor activity value (ROAV), and an orthogonal partial least squares-discriminant analysis (OPLS-DA) model was established for multidimensional flavor profiling.The results indicated that as storage time increased, the L* and b* values of the samples significantly increased, while the a* value decreased.The pH exhibited an initial decline followed by a rise.Total plate count, TBA, AV, and POV showed increasing trends throughout storage.Additionally, a marked increase in free water content suggested enhanced lipid oxidation and migration of bound water to free water.GC-MS analysis identified 60 volatile compounds in total, with hydrocarbons being the most abundant (30), followed by alcohols (14).The number of volatiles detected across storage intervals (0, 20, 40, 60, 80, and 100 days) was 36, 37, 46, 44, 45, and 37, respectively.The relative content of hydrocarbons peaked at 80 days, while the relative content of formamide reached its maximum at 100 days.Additionally, the relative content of n-hexanal attained its highest value of 1.15% at this time point.Using OPLS-DA, variable importance in projection, and ROAV, 16 key flavor compounds were identified:β-pinene, α-pinene, β-phellandrene, camphene, trans-caryophyllene, linalool, phellandrene, 3-carene, terpinene, α-terpineol, hexanal, nonanal, cineole, (+)-limonene, benzaldehyde, and 2,3-dimethylbutanal.These compounds contributed positively to the overall flavor profile of mint-fried pork ribs.This study provides theoretical insights and data support for the development and quality control of related pre-prepared food products.
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