ISO 9648:1988

Current Revision
Sorghum -- Determination of tannin content

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ISO 9648:1988

Sorghum -- Determination of tannin content

PUBLISH DATE 1988
ISO 9648:1988

The method consists in extraction by shaking with dimethylformamide, then after centrifuging, addition of ferric ammonium citrate and ammonia to an aliquot part of the supernatant liquid.

Next, spectrometric determination, at 525 nm, of the absorbance of the solution thus obtained is performed.

Finally, the tannic content is determined using a calibration curve prepared using tannic acid.

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