Effect of prolonged cold storage in a vacuum package on the quality of dry-cured ham

Processors of dry-cured ham often face the challenge of prolonged storage of their products; thus, our aim was to investigate the effect of cold storage of vacuum-packed dry-cured ham Kraski prsut for different periods on various ham characteristics. Three groups of hams stored for either 1 month (control), 4 or 7 months were evaluated for physicochemical, rheological, and sensory properties, as well as volatile profile. The increase in storage time was associated with moisture balance in the ham, as evidenced by lighter colour, softer texture, and higher moisture content, particularly in the superficial (initially more dehydrated) semimembranosus muscle. The differences were most pronounced after 4 months of storage. Further storage for up to 7 months was not associated with any significant changes or degraded quality of the product, as evidenced by the absence of sensory differences between the tested groups. The identified volatile compounds indicate that lipid oxidation was the most important process during ham storage therefore these compounds can be used to distinguish between hams with different storage durations. It can be concluded that prolonged vacuum storage for up to 7 months at refrigeration temperatures does not deteriorate ham quality and even improves the homogeneity of the pieces.