ISO-9648 › Sorghum -- Determination of tannin content
ISO-9648
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1ST EDITION
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CURRENT
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The method consists in extraction by shaking with dimethylformamide, then after centrifuging, addition of ferric ammonium citrate and ammonia to an aliqiot part of the supernatant liquid and spectrometric determination, at 525 nm, of the absorbance of the solution thus obtained, and determing of the tannic content using a calibration curve prepared using tannic acid.
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67.060 (Cereals, pulses and derived products Including grains, corn, flours, baked products, etc.)
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Document Number
ISO 9648:1988
Revision Level
1ST EDITION
Status
Current
Publication Date
Dec. 15, 1988
Committee Number
ISO TC 34/SC 4