Table 5.
Effect of crude viscera oil (CVO) extraction temperature (60 and 80 °C) on the quality of refined viscera oil (RVO), as determined by peroxide value: PV; ρ-anisidine: ρ-AV; thiobarbituric acid reactive substances: TBARS; total oxidation value: TOTOX; phospholipids; % free fatty acid: %FFA. Commercial cod liver oil was used as the control oil (CO).
| Parameters | |||||||
|---|---|---|---|---|---|---|---|
| Samples | CVO Extraction Temperature |
PV (meqO2/kg) |
ρ-AV | TBARS (MDA µg/g) |
TOTOX | Phospholipids (mg kg−1) |
Acid Value (%FFA) |
| CVO | 60 °C | 5.41 ± 0.14 b | 28.98 ± 0.90 d | 14.15 ± 0.07 d | 39.80 ± 1.18 c | 24.75 ± 1.61 d | 8.23 ± 0.82 d |
| RVO | 3.90 ± 1.15 b | 13.49 ± 0.20 b | 6.62 ± 0.39 b | 21.30 ± 2.50 b | 8.00 ± 1.10 a | 1.74 ± 0.33 b | |
| CVO | 80 °C | 11.17 ± 1.31 d | 34.56 ± 2.36 e | 17.50 ± 2.41 e | 56.90 ± 0.26 e | 47.47 ± 14.05 e | 7.41 ± 0.49 c |
| RVO | 8.63 ± 0.31 c | 24.06 ± 1.13 c | 8.96 ± 0.86 c | 41.32 ± 0.51 d | 14.42 ± 3.90 c | 6.62 ± 0.74 c | |
| CO | 2.10 ± 0.53 a | 4.96 ± 0.89 a | 5.51 ± 0.81 a | 10.83 ± 0.24 a | 10.74 ± 2.45 b | 0.50 ± 0.04 a | |
Different superscript letters in the same column indicate significant differences (a, b, c…: p < 0.05). The data are reported as mean ± standard deviation (n = 12).