ISO-9648 Sorghum -- Determination of tannin content

ISO-9648 - 1ST EDITION - 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