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See Chinese contents: GB/T 223.61-1988 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
This Standard is applicable to determination of phosphorus in pig iron, iron dust, carbon steel and alloyed steel. The phosphorus content range by determination is as: 0.01%~1.0%.
