Producción Científica Profesorado

Application of organic acid salts and high-pressure treatments to improve the preservation of blood sausage



Santos López, Eva María

2008

Diez, A.M., Santos, E.M., Jaime, I., Rovira, J. Application of organic acid salts and high-pressure treatments to improve the preservation of blood sausages, Food Microbiology, 2008,Vol. 25, pp 154-161, ISNN 0740-0020


Abstract


Blood sausages are traditional products in many parts of the world. In most cases, a very short shelf-life limits their consumption to the areas in which they are produced. In this work, different mild preservation methods were applied to Morcilla de Burgos, a Spanish blood sausage, consisting of a range of organic acid salts (OAS) and high-pressure processing (HPP), with the aim of increasing its shelf-life. In the first experiment, three batches of morcillas were produced using three different commercial OAS?PL (3% potassium lactate), PL+SL (3% potassium and sodium lactate) and PL+SD (2.5% potassium lactate and sodium diacetate)together with a control batch and were stored under chill conditions (4 C) for 35 days. In a further experiment, vacuum-packaged morcillas were treated at three different pressure levels300, 500 and 600 MPafor 10 min, and stored under chill conditions for 28 days. In both batches, a sensory difference test was performed on day 1 after treatment and the morcilla samples were subjected to microbiological and sensory analysis after each week in storage. The results suggest that, in both cases, an addition of PL+SL and the application of 600 MPa for 10 min increases the shelf-life of the morcillas by 15 days. Once again, it is evident that the initial opportunities for contamination play a very important role in improving the shelf-life of food products.






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