GB/T 223.61-1988 Methods for chemical analysis of iron, steel and alloy--The ammonium phosphomolybdate volumetric method for the determination of phosphorus content (English Version)
This standard is applicable to the determination of phosphorus content in pig iron, iron powder, carbon steel and alloy steel. Measuring range: 0.01% to 1.0%. This standard complies with GB1467-78 "General Rules and General Provisions of Standards for Chemical Analysis Methods of Metallurgical Products".
GB/T 223.61-1988 history
1988GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy--The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content