This standard specifies the method for the determination of iron content in iron powder by potassium dichromate titration. This method is applicable to the determination of iron content with a mass fraction greater than 96% in iron powder.
GB/T 223.7-2002 history
2002GB/T 223.7-2002 Iron powder--Determination of iron content--Potassium dichromate titration method
1981GB/T 223.7-1981 Determination of iron content in alloy and powder