4. Conclusion
Tannic acid (0.02% and 0.04%) and EKWE (0.08%) were effective
in retarding the lipid oxidation as indicated by lower TBARS formation
as well as lower development of fishy odour. EKWE at a level
of 0.04% was not effective in preventing the lipid oxidation in the
fish emulsion sausages. Addition of tannic acid at both levels
(0.02% and 0.04%) in the fish emulsion sausage had no detrimental
effect on the sensory properties. Samples treated with EKWE
(0.04% and 0.08%) were higher in a⁄ values, however, panelists
could not detect any difference in the colour of sausages treated
with EKWE, compared to the control. Additionally, tannic acid at
a level of 0.04% could maintain the textural properties to the highest
extent after storage for 20 days at 4 C. Thus, tannic acid, especially
at the higher level (0.04%) can be used as an effective natural
antioxidant in the fish emulsion sausages, while EKWE at 0.08%
could be an alternative but showed the lower effectiveness.