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ISO 9648:1988

Sorghum — Determination of tannin content ISO 9648:1988

Publication date:   Dec 29, 1988

General information

90.93 Standard confirmed   Apr 4, 2021

ISO

ISO/TC 34/SC 4 Cereals and pulses

International Standard

67.060   Cereals, pulses and derived products

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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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PUBLISHED
ISO 9648:1988
90.93 Standard confirmed
Apr 4, 2021

REVISED BY

ABANDON
ISO/CD 9648