ASTM E246-10(2015)

Standard Test Methods for Determination of Iron in Iron Ores and Related Materials by Dichromate Titrimetry

SIGNIFICANCE AND USE
3.1 The determination of the total iron content is the primary means for establishing the commercial value of iron ores used in international trade.  
3.2 These test methods are intended as referee methods for the determination of iron in iron ores. It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Appropriate quality control practices must be followed, such as those described in Guide E882.
SCOPE
1.1 These test methods cover the determination of total iron in iron ores, concentrates, and agglomerates in the concentration range 30 % to 95 % iron.  
1.2 The test methods in this standard are contained in the sections indicated as follows:    
Test Method A— Iron by the Hydrogen Sulfide Reduction Dichromate Titration Method (30 % to 75 % Fe)  
Test Method B—Iron by the Stannous Chloride Reduction Dichromate Titration Method (35 % to 95 % Fe)  
Test Method C—Iron by the Silver Reduction Dichromate Titration Method (35 % to 95 % Fe)  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 5 and in special “Warning” paragraphs throughout these test methods.

General Information

• Status: Historical
• Publication Date: 14-Aug-2015
• ICS: 73.060.10 - Iron ores
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.02 - Ores, Concentrates, and Related Metallurgical Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E246 − 10 (Reapproved 2015)
Standard Test Methods for
Determination of Iron in Iron Ores and Related Materials by
1
Dichromate Titrimetry
This standard is issued under the fixed designation E246; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and
Related Materials
1.1 These test methods cover the determination of total iron
E691Practice for Conducting an Interlaboratory Study to
in iron ores, concentrates, and agglomerates in the concentra-
Determine the Precision of a Test Method
tion range 30% to 95% iron.
E877Practice for Sampling and Sample Preparation of Iron
1.2 The test methods in this standard are contained in the
Ores and Related Materials for Determination of Chemi-
sections indicated as follows:
cal Composition and Physical Properties
Test Method A— Iron by the Hydrogen Sulfide Reduction Dichromate
E882Guide for Accountability and Quality Control in the
Titration Method (30% to 75% Fe)
Chemical Analysis Laboratory
E1028Test Method for Total Iron in Iron Ores and Related
Test Method B—Iron by the Stannous Chloride Reduction Dichromate
3
Titration Method (35% to 95% Fe)
Materials by Dichromate Titrimetry (Withdrawn 2003)
Test Method C—Iron by the Silver Reduction Dichromate Titration
3. Significance and Use
Method (35% to 95% Fe)
3.1 The determination of the total iron content is the
1.3 The values stated in SI units are to be regarded as
primary means for establishing the commercial value of iron
standard. No other units of measurement are included in this
ores used in international trade.
standard.
3.2 These test methods are intended as referee methods for
1.4 This standard does not purport to address all of the
thedeterminationofironinironores.Itisassumedthatallwho
safety concerns, if any, associated with its use. It is the
use these test methods will be trained analysts capable of
responsibility of the user of this standard to establish appro-
performing common laboratory procedures skillfully and
priate safety and health practices and determine the applica-
safely. It is expected that work will be performed in a properly
bility of regulatory limitations prior to use. Specific hazards
equipped laboratory and that proper waste disposal procedures
statements are given in Section 5 and in special “Warning”
will be followed.Appropriate quality control practices must be
paragraphs throughout these test methods.
followed, such as those described in Guide E882.
2. Referenced Documents
4. Apparatus, Reagents, and Instrumental Practices
2
2.1 ASTM Standards:
4.1 Apparatus—Specialized apparatus requirements are
D1193Specification for Reagent Water
listed in the “Apparatus” Section in each test method.
E50Practices for Apparatus, Reagents, and Safety Consid-
erations for Chemical Analysis of Metals, Ores, and 4.2 Reagents:
4.2.1 Purity of Reagents—Unless otherwise indicated, all
Related Materials
E276TestMethodforParticleSizeorScreenAnalysisatNo. reagentsusedinthesetestmethodsshallconformtothereagent
4
grade specifications of theAmerican Chemical Society. Other
grades may be used provided it is first ascertained that they are
of sufficient purity to permit their use without adversely
1
These test methods are under the jurisdiction of ASTM Committee E01 on
Analytical Chemistry for Metals, Ores, and Related Materials and are the direct affecting the expected performance of the determination, as
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
3
Current edition approved Aug. 15, 2015. Published August 2015. Originally The last approved version of this historical standard is referenced on
approved in 1964. Last previous edition approved in 2010 as E246–10. DOI: www.astm.org.
4
10.1520/E0246-10R15. Reagent Chemicals, American Chemical Society Specifications, American
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Chemical Society, Washington, DC, www.chemistry.org. For suggestions on the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM testing of reagents not listed by the American Chemical Society, see the United
Standards volume information, refer to the standard’s Document Summary page on States Pharmacopeia and National Formulary, U.S. Pharmacopeial Convention,
the ASTM website. Inc. (USPC), Rockville, MD, http://www.usp.org.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1

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E246 − 10 (2015)
indicated in the “P
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E246 − 10 E246 − 10 (Reapproved 2015)
Standard Test Methods for
Determination of Iron in Iron Ores and Related Materials by
1
Dichromate Titrimetry
This standard is issued under the fixed designation E246; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover the determination of total iron in iron ores, concentrates, and agglomerates in the concentration
range 30 % to 95 % iron.
1.2 The test methods in this standard are contained in the sections indicated as follows:
Test Method A— Iron by the Hydrogen Sulfide Reduction Dichromate
Titration Method (30 % to 75 % Fe)
Test Method B—Iron by the Stannous Chloride Reduction Dichromate
Titration Method (35 % to 95 % Fe)
Test Method C—Iron by the Silver Reduction Dichromate Titration
Method (35 % to 95 % Fe)
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. Specific hazards statements are given in Section 5 and in special “Warning” paragraphs throughout these
test methods.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E276 Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and Related
Materials
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E877 Practice for Sampling and Sample Preparation of Iron Ores and Related Materials for Determination of Chemical
Composition and Physical Properties
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
3
E1028 Test Method for Total Iron in Iron Ores and Related Materials by Dichromate Titrimetry (Withdrawn 2003)
3. Significance and Use
3.1 The determination of the total iron content is the primary means for establishing the commercial value of iron ores used in
international trade.
3.2 These test methods are intended as referee methods for the determination of iron in iron ores. It is assumed that all who use
these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected
1
These test methods are under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and are the direct responsibility
of Subcommittee E01.02 on Ores, Concentrates, and Related Metallurgical Materials.
Current edition approved June 15, 2010Aug. 15, 2015. Published August 2010August 2015. Originally approved in 1964. Last previous edition approved in 20052010
as E246 – 01 (2005).E246 – 10. DOI: 10.1520/E0246-10.10.1520/E0246-10R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E246 − 10 (2015)
that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed.
Appropriate quality control practices must be followed, such as those described in Guide E882.
4. Apparatus, Reagents, and Instrumental Practices
4.1 Apparatus—Specialized apparatus requirements are listed in the “Apparatus” Section in each test method.
4.2 Reagents:
4.2.1 Purity of Reagents—Unless otherwise indicated, all reagents used in these test methods shall conform to the reagent grade
4
specifications of the American Chemical Society. Other grades may be used provided it is first ascertained that they are of
sufficient purity to permit their use without adversely affecting the expected performance
...