GB/T 5687.3-1985 Methods for chemical analysis of ferro-chromium--The molybdenum blue photometric method for the determination of phosphorus content (English Version)
This standard applies to the determination of phosphorus content in ferrochromium and ferrochromium nitride. Measuring range: <0.15%.
GB/T 5687.3-1985 history
2007GB/T 4699.3-2007 Ferrochromium, silicochromium and nitrogen-bearing ferrochromium.Determination of phosphorus content.Molybdobismuthylphosphoric blue speckophotometric method and the molybdenum blue spectrophotometric method
1985GB/T 5687.3-1985 Methods for chemical analysis of ferro-chromium--The molybdenum blue photometric method for the determination of phosphorus content
GB/T 5687.3-1985 Methods for chemical analysis of ferro-chromium--The molybdenum blue photometric method for the determination of phosphorus content was changed to GB/T 4699.3-2007 Ferrochromium, silicochromium and nitrogen-bearing ferrochromium.Determination of phosphorus content.Molybdobismuthylphosphoric blue speckophotometric method and the molybdenum blue spectrophotometric method.