ASTM E508-21

Standard Test Method for Determination of Calcium and Magnesium in Iron Ores by Flame Atomic Absorption Spectrometry

SIGNIFICANCE AND USE
5.1 This test method is intended as a referee method for compliance with compositional specifications for impurity content. It is assumed that all who use this procedure will be trained analysts capable of performing common laboratory practices 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. Follow appropriate quality control practices such as those described in Guide E882.
SCOPE
1.1 This test method covers the determination of calcium and magnesium in iron ores, concentrates, and agglomerates in the mass fraction (%) range from 0.05 % to 5 % of calcium and 0.05 % to 3 % of magnesium.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2021
• ICS: 71.040.50 - Physicochemical methods of analysis
• 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)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E508 − 21
Standard Test Method for
Determination of Calcium and Magnesium in Iron Ores by
1
Flame Atomic Absorption Spectrometry
This standard is issued under the fixed designation E508; 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 4.75 mm (No. 4) Sieve and Finer for Metal-Bearing Ores
and Related Materials
1.1 This test method covers the determination of calcium
E663 Practice for FlameAtomicAbsorptionAnalysis (With-
and magnesium in iron ores, concentrates, and agglomerates in
3
drawn 1997)
themassfraction(%)rangefrom0.05 %to5 %ofcalciumand
E882 Guide for Accountability and Quality Control in the
0.05 % to 3 % of magnesium.
Chemical Analysis Laboratory
1.2 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
standard.
3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology E135.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 The sample is dissolved in HCl with the addition of a
priate safety, health, and environmental practices and deter-
small amount of HNO . After evaporation and dehydration,
mine the applicability of regulatory limitations prior to use.
3
any insoluble residue is filtered, treated for the recovery of
1.4 This international standard was developed in accor-
calcium and magnesium, and added to the main solution. The
dance with internationally recognized principles on standard-
solution is aspirated into the flame of the atomic absorption
ization established in the Decision on Principles for the
spectrometer. For calcium, a nitrous oxide-acetylene burner is
Development of International Standards, Guides and Recom-
used,formagnesium,anair-acetyleneburnerispreferred(Note
mendations issued by the World Trade Organization Technical
1). The absorbed energy at the resonance line of the spectrum
Barriers to Trade (TBT) Committee.
of calcium or magnesium, or both, is measured by atomic
2. Referenced Documents absorption spectrometry and compared with that of the cali-
2
bration solutions of the two elements.
2.1 ASTM Standards:
D1193 Specification for Reagent Water
NOTE 1—If a nitrous oxide burner is used for the determination of
magnesium, the sensitivity is decreased by a factor of about three.
E29 Practice for Using Significant Digits in Test Data to
If an air-acetylene burner is used for the determination of calcium,
Determine Conformance with Specifications
several elements, if present in a mass fraction (%) of 1.0 or greater,
E50 Practices for Apparatus, Reagents, and Safety Consid-
interfere with the calcium determination. Also, lanthanum chloride
erations for Chemical Analysis of Metals, Ores, and
(LaCl ) must be employed and the sensitivity is decreased by a factor of
3
Related Materials
about two.
E135 Terminology Relating to Analytical Chemistry for
5. Significance and Use
Metals, Ores, and Related Materials
5.1 This test method is intended as a referee method for
E276 Test Method for Particle Size or Screen Analysis at
compliance with compositional specifications for impurity
content. It is assumed that all who use this procedure will be
1
This test method is under the jurisdiction of ASTM Committee E01 on trained analysts capable of performing common laboratory
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
practices skillfully and safely. It is expected that work will be
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
performed in a properly equipped laboratory and that proper
lurgical Materials.
wastedisposalprocedureswillbefollowed.Followappropriate
Current edition approved Oct. 1, 2021. Published October 2021. Originally
approved in 1973. Last previous edition approved in 2013 as E508 – 13. DOI:
quality control practices such as those described in Guide
10.1520/E0508-21.
E882.
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West
...

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: E508 − 13 E508 − 21
Standard Test Method for
Determination of Calcium and Magnesium in Iron Ores by
1
Flame Atomic Absorption Spectrometry
This standard is issued under the fixed designation E508; 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 This test method covers the determination of calcium and magnesium in iron ores, concentrates, and agglomerates in the mass
fraction (%) range from 0.05 % to 5 % of calcium and 0.05 % to 3 % of magnesium.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E135 Terminology Relating to Analytical Chemistry for 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
3
E663 Practice for Flame Atomic Absorption Analysis (Withdrawn 1997)
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology E135.
4. Summary of Test Method
4.1 The sample is dissolved in HCl with the addition of a small amount of HNO . After evaporation and dehydration, any insoluble
3
1
This test method is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
Subcommittee E01.02 on Ores, Concentrates, and Related Metallurgical Materials.
Current edition approved Oct. 1, 2013Oct. 1, 2021. Published November 2013October 2021. Originally approved in 1973. Last previous edition approved in 20092013
as E508 – 09.E508 – 13. DOI: 10.1520/E0508-13.10.1520/E0508-21.
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

---------------------- Page: 1 ----------------------
E508 − 21
residue is filtered, treated for the recovery of calcium and magnesium, and added to the main solution. The solution is aspirated
into the flame of the atomic absorption spectrometer. For calcium, a nitrous oxide-acetylene burner is used, for magnesium, an
air-acetylene burner is preferred (Note 1). The absorbed energy at the resonance line of the spectrum of calcium or magnesium,
or both, is measured by atomic absorption spectrometry and compared with that of the calibration solutions of the two elements.
NOTE 1—If a nitrous oxide burner is used for the determination of magnesium, the sensitivity is decreased by a factor of about three.
If an air-acetylene burner is used for the determination of calcium, several elements, if present in a mass fraction (%) of 1.0 or greater, interfere with
the calcium determination. Also, lanthanum chloride (LaCl ) must be employed and the sensitivity is decreased by a factor of about two.
3
5. Significance and Use
5.1 This test method is intended as a referee method for compliance with compositional specifications for impurity content. It is
assumed that all who use this pro
...