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The Nutritive Value and Quality Index of Cotton Seed Oil

Cotton                                                            Cotton Seed

The Nutritive Value of Cotton Seed Oil
Cotton seed oil can be divided into 4 kinds; they are pressing cotton seed oil, solvent extraction cotton seed oil, genetically modified organism cotton seed oil and crude cotton seed oil.
There is 35%-45% oil, 39% protein, and 0.2%-2% gossypol in cotton nucleus. The refining cotton seed oil by removing gossypol is healthy and edible. It is orange-yellow or brown. There is a mass of unsaturated fatty acid in cotton seed oil, the fatty acid possess of 21.6%-24.8% palmitic acid, 1.9%-2.4% Stearic acid, 0-0.1% arachidic acid, 18.0%-30.7% Oleic acid, 44.9%-55.0% linoleic acid. The abundant linoleic acid can suppress cholesterol in blood rising effectively, safeguard people’s health. The digestibility of cotton seed oil for human is 98%.
The most important is having crude cotton seed oil will damage spermatogenic cells, lead to orchiatrophy, and infertility. For women, having crude cotton seed oil will lead to irregular menstruation, amenorrhea and metratrophia. Having crude cotton seed oil frequently, will lead to insolation, too. Symptom will be behaved after basking; people will feel weakness or hypohidrosis, skin broil and flushing, flustered and breathe hard, dizziness, numbness of limbs and anorexia.


Cotton oleic acid

Quality Index of Cotton Seed Oil
Crude Cotton Seed Oil Quality Index

Items

Quality Index

Smell and taste

Possess inherent smell and taste of corn germ oil, no objectionable odor

Moisture and volatile matter%

0.20

Insoluble impurity%

0.20

Acid valuemgKOH/g

4.0

Peroxide valuemmol/kg

7.5

Solvent residual amountmg/kg

100

NoticeThe index of boldface is compulsive.

Cotton Seed Oil

Pressing Cotton Seed Oil and Solvent Extraction Cotton Seed Oil Quality Index

Items

Quality Index

First Grade

Second Grade

Third Grade

Color

Lovibond cells 25.4mm

——

——

Yellow 35 Red 8.0

Lovibond cells 133.4mm

Yellow 35 Red 3.5

Yellow 35  Red 5.0

——

Smell and taste

Odor free, good taste

Smell and taste are both good

Possess inherent smell and taste of corn germ oil, no objectionable odor

Transparency

Clear, transparent

Clear, transparent

——

Moisture and volatile matter%

0.05

0.05

0.20

Insoluble impurity%

0.05

0.05

0.05

Acid valuemgKOH/g

0.20

0.30

1.0

Peroxide valuemmol/kg

5.0

5.0

6.0

Heating test280

——

——

No precipitate, Lovibond cells: Yellow value is constant, the red value increases less than 0.4

Saponified matter content%

——

——

0.03

Smoking point

215

205

——

refrigeration teststore for 5h at 0

Clear, transparent

——

——

Solvent residual amountmg/kg

Solvent Extraction cotton seed oil

Can’t be detected

Can’t be detected

≤50

Pressing cotton seed oil

Can’t be detected

Can’t be detected

Can’t be detected

Notice 1Draw with “——”needn’t be detected. When the solvent residual amount of pressing oil, first grade oil and second grade oil is less than 10mg/kg, regard it as didn’t be detected.

Notice 2The index of boldface is compulsive.

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