Sensory quality of lamb following long-term frozen storage

Abstract

The study analysed the effect of frozen storage duration (FSD) on lamb sensory quality. Trained panel evaluated Longissimus lumborum aged for 1d in unfrozen carcass plus 3d in modified atmosphere packaging on thawed (1, 9, 15 or 21month FSD) or refrigerated (0month FSD) meat. Consumer acceptability test was performed on leg chops (Semimembranosus) kept in the same conditions but those chops for the visual test were retail displayed up to 10d from packaging. FSD differed on texture variables and fresh meat showed intermediate values among thawed meats for trained evaluators. Consumers gave the lowest acceptability to 21months FSD and preferred 1month FSD, being all meats ‘acceptable’. A third of the population scored fresh meat with the lowest acceptance after consumption, although its visual score remained ‘acceptable’ 3d longer than most of thawed meats. As thawed and fresh meats were equally preferred at short display, consumer concerns about thawed meat might be reconsidered.