PV (meq/kg) Heating temperature (°C) P1
50 120 200 400
Heating time (h) 0 0.983 ± 0.104a,# 0.983 ± 0.104a,# 0.983 ± 0.104a,# 0.983 ± 0.104a,# ns
0.5 1.013 ± 0.105a,# 1.260 ± 0.078a,≠ 2.577 ± 0.585b,≠ 4.387 ± 0.361c,≠ <0.0001
1 1.050 ± 0.118a,# 1.390 ± 0.017a,† 2.743 ± 0.630b,≠ 4.240 ± 0.246c,≠ <0.0001
2 1.110 ± 0.115a,# 1.363 ± 0.015a,† 1.997 ± 0.105d,† 4.033 ± 0.153c,≠ <0.0001
P2 ns 0.0002 0.0045 <0.0001  
The values are given as mean ± standard deviation
The values of the same line superscripted with the same letter are not significantly different at P<0.05
The values of the same column superscripted with the sign #, ≠ or † are not significantly different at P<0.05
1Comparison of PV between different heating temperatures at the same heating time
2Comparison of PV between different heating time at the same heating temperature
ns: No significant difference at P<0.05
Table 5: Variation of PV of heated CPO according to the time and the temperature of heating.