ISO 9648:1988

Sorghum — Determination of tannin content

Publication date: Dec 29, 1988

General information

Current stage: 90.20 Effective date: Apr 15, 2026

Originator: ISO

Owner: ISO/TC 34/SC 4

Type: International Standard

ICS: 67.060

Languages: French English

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Status: Published

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 9648:1988
90.20 Standard under periodical review
Apr 15, 2026

REVISED BY

ABANDON
ISO/CD 9648

National adoptions

SSH ISO 9648:1988

DPS

Sorghum — Determination of tannin content

60.60 Standard published

DPS/KT 275 more

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