ISO-6866 › Animal feeding stuffs - Determination of free and total gossypol

ISO-6866 - 1ST EDITION - CURRENT


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The method is applicable to cottonseed and cottonseed meals and cakes. The method consists in extracting of the compound in the presence of 3-aminopropane-1-ol, either with a mexture of 2-propanol and hexane for the determination of free gossypol or with dimethylformamide for the determination of total gossypol. Conversion to gossypol-dianiline using aniline, and measurement of the absorbance at the wavelength of maximum absorbance (between 435 and 445 nm).

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65.120 (Animal feeding stuffs Microbiology of animal feeding stuffs, see 07.100.30)

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Document Number

ISO 6866:1985

Revision Level

1ST EDITION

Status

Current

Publication Date

Nov. 15, 1985

Committee Number

ISO TC 34/SC 10