SIST ISO 5566:1997 PDF
Turmeric -- Determination of colouring power -- Spectrophotometric method
Turmeric -- Determination of colouring power -- Spectrophotometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 1 июня 1997 г.
- ICS:
- 67.220.10
- Технический комитет:
- KŽP - Agricultural food products
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.
Abstract
Overview
establishes a standardized procedure for assessing the colouring power of turmeric using spectrophotometric analysis. This international standard, adopted by SIST, focuses on the quantification of curcumin content - the primary pigment responsible for turmeric's characteristic color. The method consists of extracting pigments from ground turmeric with hot ethanol, diluting the extract, and measuring the maximum absorbance at a specific wavelength (425 nm). The final result is expressed as curcumin percentage by mass.
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