GB/T 38812.4-2022
Direct reduced iron—Determination of metallic iron—Bromine-methanol titrimetric method (English Version)

Standard No.: GB/T 38812.4-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 38812.4-2022

Scope: This document specifies a method for the determination of metallic iron by oxidation-reduction titration by dissolving metallic iron in bromine-methanol. This document is applicable to the determination of metallic iron content in direct reduced iron, and the determination range (mass fraction) is 15% to 95%.

GB/T 38812.4-2022 Referenced Document

GB/T 12805 Laboratory glassware.Burettes
GB/T 12806 Laboratory glassware.One-mark volumetric flasks
GB/T 12808 Laboratory glass instrument single marked line pipette
GB/T 6379.2 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 6730.3 Iron ores—Determination of hygroscopic moisture in analytical samples—Gravimetric, Karl Fischer and mass-loss methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

2022 GB/T 38812.4-2022 Direct reduced iron—Determination of metallic iron—Bromine-methanol titrimetric method