This standard specifies the determination of potassium content in compound fertilizers. This standard applies to the determination of potassium content in compound fertilizers.
GB/T 8574-2002 history
2010GB/T 8574-2010 Determination of potassium content for compound fertilizers.Potassium tetraphenylborate gravimetric method
1987GB 8574-1988 Determination of Potassium Content in Compound Fertilizer Gravimetric Method of Potassium Tetraphenylborate