GB 223.45-1985 Methods for chemical analysis of iron,steel and alloy--The cupral separation-xylidyl blue 2 photometric method for the determination of magnesium content (English Version)
1994GB/T 223.45-1994 Methods for chemical analysis of iron,steel and alloy. The cupral Separation-xylidyl blue Ⅱphotometric method for the determination of magnesium content
1985GB 223.45-1985 Methods for chemical analysis of iron,steel and alloy--The cupral separation-xylidyl blue 2 photometric method for the determination of magnesium content
GB 223.45-1985 Methods for chemical analysis of iron,steel and alloy--The cupral separation-xylidyl blue 2 photometric method for the determination of magnesium content was changed to GB/T 223.45-1994 Methods for chemical analysis of iron,steel and alloy. The cupral Separation-xylidyl blue Ⅱphotometric method for the determination of magnesium content.