Physico-chemical Changes in Liquid Smoke Flavoured Yellowfin Tuna (Thunnus albacares) Sausage During Chilled Storage

摘要

A liquid smoke flavoured sausages were prepared from yellowfin tuna using a commercial liquid smoke flavouring. Physico-chemical changes in the sausages during chilled storage at 3 ± 1 °C were analysed and compared with that of a control. Total plate count was estimated at every 15th day of storage. Liquid-smoked sausages were were found to have higher moisture content but recorded lower values for total volatile base-nitrogen, trimethylamine and thiobarbituric acid (P < 0.01). Free fatty acid value in both types of sausages did not show any significant difference (P > 0.01). Instrumental colour measurements showed lower L* (lightness), a* (redness) and b* (yellowness) values for liquid smoke flavoured sausages (P < 0.01). The liquid-smoked sausages showed lower hardness values (P < 0.01). Both liquid-smoked and control sausages were found to be sensory wise acceptable up to 55th days of storage and subsequently rejected on the 60th day. The microbial count in both the types of sausages was within the acceptable limit during this period.