90.93 Standard confirmed May 23, 2023
ISO
ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
International Standard
65.080 Fertilizers
Published
Specifies two equivalent methodes. They consist in dissolving the wanted substance in a mixture of hydrochloric and nitric acids or in a mixture of sulfuric and nitric acids.
PUBLISHED
ISO 7497:1984
90.93
Standard confirmed
May 23, 2023