pure groundnut oil refined rapeseed oil

                                               
                                               
                                               
                                               
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  • Is rapeseed oil a polyunsaturated fatty acid?
  • Rapeseed oil contains around 1.5?6% palmitic acid, around 0.5?3.1% stearic acid, around 28% oleic acid, around 11?23% linoleic acid, and around 5?13% linolenic acid. It is characterized by the ideal content of polyunsaturated fatty acid due to the ratio (2:1) of linoleic acid (n-6) and linolenic acid (n-3) fatty acid.
  • How to distinguish cold pressed oil from refined oil for adulteration investigation?
  • The difference between some of the obtained results is not relevant for telling the cold-pressed oils from their refined version for adulteration investigation purpose. Colour analysis instead is a very good method to differentiate a cold pressed oil from a refined one.
  • Is rapeseed oil high oleic or low erucic acid?
  • We used the high-oleic variant of sunflower oil as a positive control as it was markedly higher in the C18:1 content compared to the low-oleic variant. Similarly, the high-erucic acid variant of rapeseed oil was more pronounced in C22:1 compared to the low-erucic acid variant (high-lighted green boxes).
  • Does rapeseed oil differ after refining?
  • Differences were considered statistically significant at P< 0.05. The AV, PV, p -AV of the rapeseed oil in varieties after each refining process are shown in Fig 1. The AV of five different kinds of crude rapeseed oils were from 2.15 to 3.59 mg KOH/g and decreased significantly after neutralization, ranging from 0.29 to 0.45 mg KOH/g.