ASTM E841-04
(Test Method)Standard Test Method for Determination of Copper in Iron Ores and Related Materials by Atomic Absorption Spectroscopy
Standard Test Method for Determination of Copper in Iron Ores and Related Materials by Atomic Absorption Spectroscopy
SIGNIFICANCE AND USE
In the making of iron and steel during the reduction of iron ores, copper forms alloy with iron and steel hence the necessity of determining the copper concentration for metallurgical consideration.
This test method is intended to be used for compliance with compositional specifications for copper content. It is assumed that all who use these procedures 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 This test method covers the determination of copper in iron ores, concentrates, agglomerates, and related materials in the concentration range from 0.003 to 1 %.
1.2 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.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E841–04
Standard Test Method for
Determination of Copper in Iron Ores and Related Materials
1
by Atomic Absorption Spectrometry
This standard is issued under the fixed designation E841; 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 E882 Guide for Accountability and Quality Control in the
Chemical Analysis Laboratory
1.1 This test method covers the determination of copper in
E1601 Practice for Conducting an Interlaboratory Study to
iron ores, concentrates, agglomerates, and related materials in
Evaluate the Performance of an Analytical Method
the concentration range from 0.003 to 1 %.
1.2 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions—For definitions of terms used in this test
responsibility of the user of this standard to establish appro-
method, refer to Terminology E135.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents 4.1 The sample is dissolved in hydrochloric acid with the
2 addition of a small amount of nitric and hydrofluoric acids.
2.1 ASTM Standards:
After evaporation to fumes with perchloric acid, the solution is
D1193 Specification for Reagent Water
diluted with water and filtered. A portion of the solution is
E50 Practices for Apparatus, Reagents, and Safety Consid-
examined by atomic absorption spectroscopy using standards
erations for Chemical Analysis of Metals, Ores, and
containing approximately the same amount of iron as the test
Related Materials
sample.
E135 Terminology Relating to Analytical Chemistry for
Metals, Ores, and Related Materials
5. Significance and Use
E173 Practice for Conducting Interlaboratory Studies of
3 5.1 In the making of iron and steel during the reduction of
Methods for Chemical Analysis of Metals
iron ores, copper forms alloy with iron and steel hence the
E276 Test Method for Particle Size or Screen Analysis at
necessity of determining the copper concentration for metal-
No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores
lurgical consideration.
and Related Materials
5.2 This test method is intended to be used for compliance
3
E663 Practice for Flame Atomic Absorption Analysis
with compositional specifications for copper content. It is
E877 Practice for Sampling and Sample Preparation of Iron
assumed that all who use these procedures will be trained
Ores and Related Materials for Determination of Chemical
analysts capable of performing common laboratory procedures
Composition
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
1
This test method is under the jurisdiction of ASTM Committee E01 on
control practices must be followed, such as those described in
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
Guide E882.
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
Current edition approved May 1, 2004. Published June 2004. Originally
6. Interferences
approved in 1981. Last previous edition approved in 1999 as E841 – 99. DOI:
6.1 None of the elements normally found in iron ores
10.1520/E0841-04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or interfere with this test method.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
7. Apparatus
the ASTM website.
3
7.1 Atomic Absorption Spectrometer, meeting the following
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org. criteria:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E841–04
7.1.1 Minimum Sensitivity—The absorbance of the highest 8.6.1 Transfer 1.0, 3.0, 5.0, 7.0, and 10.0-mL portions of
calibration solution (see 8.6) must be at least 0.3. copper Standard Solution B or C to 100-mL volumetric flasks.
7.1.2 Curve—Linearity—The difference between the read- Add 20.0 mL of background solution, dilute to volume, and
ings of the two highest calibration solutions must be more than mix.
1.4 times the difference between the readings for the zero 8.7 Hydrochloric Acid (HCl) (1 + 1)—Mix 1 volume of
solution and the lowest calibration solution (see 8.6). hydrochloric acid (HCl) with 1 volume o
...
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