90.93 Standard confirmed Dec 11, 2021
ISO
ISO/TC 34/SC 10 Animal feeding stuffs
International Standard
65.120 Animal feeding stuffs
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).
PUBLISHED
ISO 6866:1985
90.93
Standard confirmed
Dec 11, 2021