GB/T 8654.5-1988 Methods for chemical analysis of manganese metal--The molybdenum blue photometric method for the determination of phosphorus content (English Version)
This standard applies to the determination of phosphorus in metallic manganese and electrolytic metallic manganese. Measuring range: less than 0.07%.
GB/T 8654.5-1988 history
2022GB/T 5686.4-2022 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of phosphorus content—Molybdenum blue spectrophotometric method and bismuth phosphomolybdate b
2008GB/T 5686.4-2008 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of phosphorus content. Molybdenum blue photometric method and alkali content titrimetric method
1988GB/T 8654.5-1988 Methods for chemical analysis of manganese metal--The molybdenum blue photometric method for the determination of phosphorus content
GB/T 8654.5-1988 Methods for chemical analysis of manganese metal--The molybdenum blue photometric method for the determination of phosphorus content was changed to GB/T 5686.4-2008 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal. Determination of phosphorus content. Molybdenum blue photometric method and alkali content titrimetric method.