The turmeric rhizome contains a variety of pigments. It is used as a natural dye in food industries and in cosmetic and pharmaceutical products as an antimicrobial
The powder contains a large number of aromatic compounds; curcumin is the major compound responsible for the characteristic color. In pure form it is an orange yellow crystalline powder, soluble in alcohol and glacial acetic acid. Curcumin content is used as an index for the quality of the produce. The method to extract curcumin is very simple and is given below.
Curcumin is quantitatively extracted by refluxing the material in alcohol and is estimated spectrometrically at 425nm.
» Absolute Alcohol
» Stoppered Flask and Air-condenser
Work out the curcumin content using the formula
since 0.42 absorbance at 425nm = 0.0025g curcumin.
Alcohol is inflammable. Use no direct flame.
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