GB/T 7730.3-1997
Methods for chemical analysis of ferromanganese. The determination of phosphorus content (English Version)

Standard No.

GB/T 7730.3-1997

Language

Chinese, Available in English version

Release Date

1997

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2008-11

Replace By

GB/T 5686.4-2008

Latest

GB/T 5686.4-2022

Scope

This standard is applicable to the determination of phosphorus content in carbon ferromanganese, medium carbon ferromanganese, low carbon ferromanganese and blast furnace ferromanganese. This standard specifies the following two methods for the determination of phosphorus in ferromanganese. Method I: molybdenum blue spectrophotometric measurement range: 0.050% to 0.450%. Method Ⅱ: Determination of phosphorus titration method Determination range: 0.080% ~ 0.650%.

GB/T 7730.3-1997 history

• 2022 GB/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
• 2008 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
• 1997 GB/T 7730.3-1997 Methods for chemical analysis of ferromanganese. The determination of phosphorus content

GB/T 7730.3-1997 Methods for chemical analysis of ferromanganese. 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.

GB/T 7730.3-1997 -All Parts