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ISO 5566:1982
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ISO 5566:1982 Turmeric -- Determination of colouring power -- Spectrophotometric method
standard by International Organization for Standardization, 11/01/1982
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Full Description
Describes a method based on the extraction of the pigments of turmeric with hot ethanol, dilution of the extract and spetrophotometric measurement at the wavelenghth of maximum absorption. The result of the measurement is expressed as curcumin as a percentage by mass.