ASTM E246-01(2005)
(Test Method)Standard Test Methods for Determination of Iron in Iron Ores and Related Materials by Dichromate Titration
Standard Test Methods for Determination of Iron in Iron Ores and Related Materials by Dichromate Titration
SIGNIFICANCE AND USE
The determination of the total iron content is the primary means for establishing the commercial value of iron ores used in international trade.
These test methods are intended as referee methods for the determination of iron in iron ores. It is assumed that all who use these 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 E 882.
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 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.
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Designation:E246–01(Reapproved2005)
Standard Test Methods for
Determination of Iron in Iron Ores and Related Materials by
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Dichromate Titration
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 Chemical Analysis Laboratory
1.1 These test methods cover the determination of total iron
3. Significance and Use
in iron ores, concentrates, and agglomerates in the concentra-
3.1 The determination of the total iron content is the
tion range 30 to 95% iron.
primary means for establishing the commercial value of iron
1.2 The test methods in this standard are contained in the
ores used in international trade.
sections indicated as follows:
3.2 These test methods are intended as referee methods for
Test Method A—Iron by the Hydrogen Sulfide Reduction
thedeterminationofironinironores.Itisassumedthatallwho
Dichromate Titration Method (30 to 75% Fe)
use these methods will be trained analysts capable of perform-
Test Method B—Iron by the Stannous Chloride Reduction
ing common laboratory procedures skillfully and safely. It is
Dichromate Titration Method (35 to 95% Fe)
expected that work will be performed in a properly equipped
Test Method C—Iron by the Silver Reduction Dichromate
laboratory and that proper waste disposal procedures will be
Titration Method (35 to 95% Fe)
followed. Appropriate quality control practices must be fol-
1.3 This standard does not purport to address all of the
lowed, such as those described in Guide E882.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Apparatus, Reagents, and Instrumental Practices
priate safety and health practices and determine the applica-
4.1 Apparatus—Specialized apparatus requirements are
bility of regulatory limitations prior to use. Specific hazards
listed in the “Apparatus” Section in each test method.
statements are given in Section 5 and in special “Warning”
4.2 Reagents:
paragraphs throughout these test methods.
4.2.1 Purity of Reagents—Unless otherwise indicated, all
2. Referenced Documents reagentsusedinthesetestmethodsshallconformtothereagent
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2 grade specifications of theAmerican Chemical Society. Other
2.1 ASTM Standards:
gradesmaybeusedprovideditisfirstascertainedthattheyare
D1193 Specification for Reagent Water
of sufficient purity to permit their use without adversely
E50 Practices for Apparatus, Reagents, and Safety Consid-
affecting the expected performance of the determination, as
erations for Chemical Analysis of Metals, Ores, and
indicated in the “Precision and Bias” Section. Reagent water
Related Materials
shall conform to Type II as described in Specification D1193.
E276 Test Method for Particle Size or Screen Analysis at
No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores
5. Hazards
and Related Materials
5.1 For precautions to be observed in the use of certain
E877 Practice for Sampling and Sample Preparation of Iron
reagents and equipment in this test method refer to Practices
Ores and Related Materials for Determination of Chemical
E50.
Composition
E882 Guide for Accountability and Quality Control in the
6. Sampling and Sample Preparation
6.1 Collect and prepare the test sample in accordance with
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These test methods are under the jurisdiction of ASTM Committee E01 on
Practice E877.
Analytical Chemistry for Metals, Ores, and Related Materials and are the direct
6.2 The test sample shall be pulverized to pass a No. 100
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
(150-µm) sieve in accordance with Test Method E276.To
lurgical Materials.
Current edition approved May 1, 2005. Published June 2005. Originally
approved in 1964. Last previous edition approved in 2001 as E246–01. DOI:
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10.1520/E0246-01R05. 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 service@astm.org. 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.
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E246–01 (2005)
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