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Table 2
Analytical parameters for the moringa oils investigated.
| Samples investigated | ||||
| Grain oil by | Grain oil by | Mixed crude | Mixed | |
| Analytical parameters measured | mechanical | solvent | oil | purified oil |
| pressing | extraction | |||
| Acidity index (mgKOH g-1 oil) (IAL-2008) | 8.8 | 20.5 | 18.1 | 0.2 |
| Peroxide index (meqO2 kg-1 of oil) (IAL-2008) | 3.3 | 5.4 | 5.2 | n.d.(**) |
| Water content (Karl Fischer) (mg kg-1) (NBR 11348/ASTM D6304) | 876.6 | 632.0 | – | 630.2 |
| Specific mass (kg m-3 at 20 °C) (NBR 14065/ASTM D4052) | 909.5 | 907.2 | – | 907.0 (*) |
| Kinematic Viscosity (mm2 s-1 at 40 °C) (NBR 10441/ASTM D445) | 43.6 | 39.1 | – | 41.7 |
| Saponification index (mgKOH g-1 of oil) (IAL-2008) | 180.6 | 179.4 | – | – |
| Iodine value(gI2 100 g-1 of oil) (Wijs / IAL-2008) | 68.9 | 70.7 | – | – |
| Turbidity (NTU at 20 °C) (Turbidimeter Hach 2100N) | 64.1 | 12.6 | 18.7 | 2.1 |
| Higher calorific value (HCV) MJ kg-1 (IKA C2000) | 39.7 | 40. | – | 39.4 |
| Lower calorific value (LCV) MJ kg-1 (Calculated) | 36.7 | 36.9 | – | 37.1 |
| Ash content (%) (NBR 9842) | 0.05 | 0.05 | – | 0.007 |
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