Quality index

Grape seed oil

Corn germ oil

Walnut oil

Acidity index, mg КОН/g oil

3.1

2.6

3.8

Peroxide Value, (mmol/kg oil)

9.2

8.8

9.8

Mass fraction of impurities (sediment mass relative to mass of sample), %

0.20

0.15

0.25

Mass fraction of water and volatiles, %

0.15

0.10

0.20

Mass fraction of unsaponifiables, %

2.0

1.0

1.2

Relative density.

0.925

0.918

0.922

Saponification index, mg KOH/g oil

192

194

198

Iodine index, g I₂/100 g oil

138

131

158