Effect of two different red grape pomace extracts obtained under different extraction systems on meat quality of pork burgers

The effect on meat quality (pH, microbial spoilage, lipid oxidation and colour coordinates) of two different types of red grape pomace extracts obtained by different extraction systems [(Grape pomace extract I, GPI (methanolic extraction + High-Low Instantaneous Pressure HLIP GPI) and Grape pomace extract II, GPII (methanolic extraction, GPII) at 0.06 g/100 g final product concentration] in pork burgers packed under aerobic conditions (4 degrees C) was assessed at 0, 3 and 6 days post-storage. Based on the results the highest colour stability, lipid oxidation inhibition and the best global acceptability after 6 days of storage (data not shown) observed in burgers added with the GPI indicate that the new extraction system (HLIP) developed could be a valid alternative to optimize the purity of the grape pomace extracts in order to use them as preservative in meat foodstuffs. (C) 2011 Elsevier Ltd. All rights reserved.