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Estimation of α-tocopherol concentration necessary to optimise lamb meat quality stability during storage in high-oxygen modified atmosphere using broken-line regression analysis

Published online by Cambridge University Press:  01 September 2008

I. Álvarez ,
J. De la Fuente ,
M. T. Díaz ,
S. Lauzurica ,
C. Pérez  and
V. Cañeque
I. Álvarez
Affiliation:
Departamento Tecnología de los Alimentos, INIA, Ctra. A Coruña km. 7.5, 28040 Madrid, Spain
J. De la Fuente
Affiliation:
Facultad de Veterinaria, Departamento Producción Animal, Universidad Complutense de Madrid, Avda. Puerta de Hierro, s/n, 28040 Madrid, Spain
M. T. Díaz
Affiliation:
Departamento Tecnología de los Alimentos, INIA, Ctra. A Coruña km. 7.5, 28040 Madrid, Spain
S. Lauzurica
Affiliation:
Facultad de Veterinaria, Departamento Producción Animal, Universidad Complutense de Madrid, Avda. Puerta de Hierro, s/n, 28040 Madrid, Spain
C. Pérez
Affiliation:
Facultad de Veterinaria, Departamento Fisiología (Fisiología Animal), Universidad Complutense de Madrid, Avda. Puerta de Hierro, s/n, 28040 Madrid, Spain
V. Cañeque*
Affiliation:
Departamento Tecnología de los Alimentos, INIA, Ctra. A Coruña km. 7.5, 28040 Madrid, Spain
*
E-mail: [email protected]
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Abstract

The research was carried out to evaluate the effect of different α-tocopherol concentrations in lamb meat on oxidative stability during storage in high-oxygen atmosphere. Thirty-six lambs were randomly distributed to four groups and given diets containing four levels of vitamin E (20, 270, 520 and 1020 mg vitamin E/kg feed) from an initial weight of 13.2 ± 0.5 kg to a slaughter weight of 26.2 ± 0.3 kg. Supplementation of the diet with vitamin E increased (P < 0.001) the concentration of α-tocopherol in the meat and concentrations were obtained in the 0.46 to 4.14 mg/kg meat range. Broken-line analysis of data indicated a target dietary vitamin E supplementation of 287 mg/kg feed, which corresponded with a concentration of 2.26 mg α-tocopherol/kg meat. α-Tocopherol in meat was highly correlated with the oxidation of lipids and pigments. Broken-line analysis of data indicated the target α-tocopherol concentration in lamb for improved protection against lipid and pigment oxidation during 14, 21 and 28 days of storage in high-oxygen atmosphere was in the range 1.87 to 2.37 mg/kg meat. These concentrations of α-tocopherol in the meat made it possible to maintain the indicator values of lipid and pigment oxidation below the values considered in the bibliography as unacceptable to the consumer.

Keywords

lamb meatvitamin Eoxidationmodified atmospherebroken-line
Type
Full Paper
Information
animal , Volume 2 , Issue 9 , September 2008 , pp. 1405 - 1411
Copyright
Copyright © The Animal Consortium 2008

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