Characteristics

Crude oil

Oil filtered on sand

Acid value (mg KOH g⁻¹)

1.62^a ± 0.16

1.33^c ± 0.10

Peroxide value (mEqO₂∙Kg⁻¹)

4.40^a ± 0.33

3.46^b ± 0.24

Chlorophyll (mg∙kg⁻¹)

1.81^a ± 0.26

1.62^ab ± 0.09

Carotenoids (mg∙kg⁻¹)

0.68^a ± 0.09

0.62^a ± 0.01

k₂₃₂ nm

1.09^a ± 0.02

0.84^b ± 0.01

k₂₇₀ nm

0.08^a ± 0.01

0.74^ab ± 0.01