标准摘要
ISO 17319:2015 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. ISO 17319:2015 is applicable to those fertilizers containing more than 1,0 % K 2 O or equivalent amount of K content.
英文名称Fertilizers and soil conditioners — Determination of water-soluble potassium content — Potassium tetraphenylborate gravimetric method