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How do you find adulteration in oil?

Updated: 9/21/2023
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12y ago

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Heat small amount of vegetable ghee with acetic anhydride. Droplets

of oil floating on the surface of unused acetic anhydride indicates the

presence of wax or hydrocarbons.

(ii) Adulteration of dyes in fat

Heat 1mL of fat with a mixture of 1mL of conc. sulphuric acid and 4mL of acetic acid. Appearance of pink or red colour indicates presence of dye in fat.

(iii) Adulteration of argemone oil in edible oils

To small amount of oil in a test-tube, add few drops of conc. HNO3 and shake. Appearance of red colour in the acid layer indicates presence of argemone oil.

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Q: How do you find adulteration in oil?
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