90.20 Standard under periodical review Jul 15, 2026
ISO
ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
International Standard
65.080 Fertilizers
Published
ISO 18643:2016 specifies the test procedure for determination of the biuret content in liquid and solid urea-based fertilizers based on the HPLC method.
PUBLISHED
ISO 18643:2016
90.20
Standard under periodical review
Jul 15, 2026