GB/T 5687.1-1985 Methods for chemical analysis of ferro-chromium--The ammonium persulfate oxidation volumetric method for the determination of chromium content (English Version)
This standard applies to the determination of chromium content in ferrochromium and ferrochromium nitride. Measuring range: 45.00 to 80.00%.
GB/T 5687.1-1985 history
2008GB/T 4699.2-2008 Ferrochromium and ferrosilicochromium. Determination of chromium content. The ammonium persulfate oxidation titrimetric method and potentiometric titration method
1985GB/T 5687.1-1985 Methods for chemical analysis of ferro-chromium--The ammonium persulfate oxidation volumetric method for the determination of chromium content
GB/T 5687.1-1985 Methods for chemical analysis of ferro-chromium--The ammonium persulfate oxidation volumetric method for the determination of chromium content was changed to GB/T 4699.2-2008 Ferrochromium and ferrosilicochromium. Determination of chromium content. The ammonium persulfate oxidation titrimetric method and potentiometric titration method.