What are specific chemical tests for fixed oil.

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P.V.ABHIGNA's picture

Chemical Tests: 1)Using Sodium hydroxide:To 1ml 1% copper sulphate solution add 5 drops of fixed oil.Then add 5 drops of 10% sodium hydroxide.A clear blue solution is obtained that indicates glycerin in sample. 2)Using sodium hydrogen sulphate:To 5 drops of solution in a test tube add a pinch of sodium hydrogen sulphate.Pungent odour eolves from the tube indicating glycerine. REF:PHARMACOGNOSY-NEERALI PRAKASHAN PUBLICATIONS.34TH EDITION, Page-272


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