ISO 6654:1991 Preview
Animal feeding stuffs -- Determination of urea content
This standard was last reviewed and confirmed in 2013. Therefore this version remains current.
Specifies a spectrometric method for the determination of the urea content. Gives a normative reference to ISO 6498:1983. Defines the term urea content. Describes principle, reagents, apparatus, sampling, preparation of the test sample, procedure, expression of results and test report.