GB/T 6730.71-2014
Iron ores.Determination of acid-soluble iron(II) content.Titrimetric method (English Version)

Standard No.: GB/T 6730.71-2014
Language: Chinese, Available in English version
Release Date: 2014
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 6730.71-2014

Scope: This part of GB/T 6730 specifies the titration method for the determination of ferrous iron content. This section applies to the determination of ferrous iron content in natural and processed iron ores, the determination range (mass fraction): 0.2% ~ 28.0%. This method is only suitable for use in the ore reduction test specified in GB/T 24515 or GB/T 24189, and is not suitable for ores with a sulfur content greater than 0.3% or free carbon greater than 5.0%. The test shows that the acid-insoluble residue can be neglected under the requirement of the precision of the reduction test method.

GB/T 6730.71-2014 Referenced Document

GB/T 10322.1 Iron ore sampling and sample preparation methods*， 2023-08-06 Update
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*， 2016-07-01 Update
GB/T 24189 Iron ores for blast furnace feedstocks.Determination of the reducibility by the final degree of reduction index
GB/T 24515 Iron ores for blast furnace feedstocks-Determination of the reducibility by the rate of reduction index
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 6730.1 Iron ores.Preparation of predried test samples for chemical analysis*， 2016-02-24 Update
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
ISO 4791-1 Laboratory apparatus; Vocabulary relating to apparatus made essentially from glass, porcelain or vitreous silica; Part 1 : Names for items of apparatus Trilingual edition

2014 GB/T 6730.71-2014 Iron ores.Determination of acid-soluble iron(II) content.Titrimetric method