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The quality characteristics of dry-cured hams from different regions of Yunnan province were studied by analyzing five types of Yunnan dry-cured hams (Xuanwei ham, Sanchuan ham, Nuodeng ham, Saba ham, and Heqing ham) using headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) and headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS). The analysis aimed to identify different volatile organic compounds (VOCs) in the dry-cured ham samples. Forty-one VOCs were qualitatively characterized by HS-GC-IMS from dry-cured ham samples, of which Nuodeng ham and Saba ham had similar fingerprint profiles and contained higher levels of aldehydes and alcohols. Meanwhile, a total of 12 qualitatively differential characteristic markers were screened by the PLS-DA model. Furthermore, 128 main VOCs were identified by HS-SPME-GC-MS, of which 26 differential characteristic markers were screened by the PLS-DA model. HCA analysis showed that the VOCs of Sanchuan ham were different from those of the other four dry-cured hams due to the unique processing. These results can contribute to a more comprehensive understanding of the flavor characteristics of dry-cured hams from different regions of Yunnan.

With the development of the food industry, the problem of food safety has become a common concern for people all over the world. Metal-organic frameworks (MOFs), a class of functional materials with unique physical and chemical properties, have shown promising applications in food preservation due to their porous structure as well as remarkable antibacterial properties. MOFs have been developed as antimicrobial agents to extend the shelf life and delay quality deterioration of food products as well as improve the performance of food packaging materials. In this review, we discuss the application of MOFs as antimicrobial agents, oxygen scavengers, and ethylene scavengers in food packaging, and highlight future prospects and problems in this field. This review aims to provide reference for the application of MOFs in food packaging.