Reference number
ISO 9648:1988
© ISO 2025
International Standard
ISO 9648:1988
Sorghum — Determination of tannin content
Edition 1
1988-12
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Published (Edition 1, 1988)
This publication was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 9648:1988

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Format
CHF 43
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 1988-12
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 34/SC 4
    ICS :
    67.060 
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