Fertilizers and soil conditioners —Determination of watersoluble potassium content — Potassium tetraphenylborate gravimetric method


Document Number: NL ISO 17319:2018
Sector: Chemical Technology
TC: NL TC 134
ICS: 65.080
This International Standard specifies a gravimetric method for the determination of the water-soluble potassium content of test solutions of fertilizers. It is suitable for use in arbitration and for reference purposes. This International Standard is applicable to those fertilizers containing more than 1,0 % K2O or equivalent amount of K content