ASTM E508-09
(Test Method)Standard Test Method for Determination of Calcium and Magnesium in Iron Ores by Flame Atomic Absorption Spectrometry
Standard Test Method for Determination of Calcium and Magnesium in Iron Ores by Flame Atomic Absorption Spectrometry
SIGNIFICANCE AND USE
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 E 882.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: E508 − 09
StandardTest 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 3. Terminology
1.1 This test method covers the determination of calcium 3.1 Definitions—For definitions of terms used in this test
and magnesium in iron ores, concentrates, and agglomerates in method, refer to Terminology E135.
themassfraction(%)rangefrom0.05 %to5 %ofcalciumand
0.05 % to 3 % of magnesium. 4. Summary of Test Method
1.2 The values stated in SI units are to be regarded as 4.1 The sample is dissolved in HCl with the addition of a
standard. No other units of measurement are included in this small amount of HNO . After evaporation and dehydration,
3
standard. any insoluble residue is filtered, treated for the recovery of
calcium and magnesium, and added to the main solution. The
1.3 This standard does not purport to address all of the
solution is aspirated into the flame of the atomic absorption
safety concerns, if any, associated with its use. It is the
spectrometer. For calcium, a nitrous oxide-acetylene burner is
responsibility of the user of this standard to establish appro-
used,formagnesium,anair-acetyleneburnerispreferred(Note
priate safety and health practices and determine the applica-
1). The absorbed energy at the resonance line of the spectrum
bility of regulatory limitations prior to use.
of calcium or magnesium, or both, is measured by atomic
absorption spectrometry and compared with that of the cali-
2. Referenced Documents
bration solutions of the two elements.
2
2.1 ASTM Standards:
NOTE 1—If a nitrous oxide burner is used for the determination of
D1193 Specification for Reagent Water
magnesium, the sensitivity is decreased by a factor of about three.
E50 Practices for Apparatus, Reagents, and Safety Consid-
If an air-acetylene burner is used for the determination of calcium,
erations for Chemical Analysis of Metals, Ores, and
several elements, if present in a mass fraction (%) of 1.0 or greater,
Related Materials
interfere with the calcium determination. Also, lanthanum chloride
E135 Terminology Relating to Analytical Chemistry for (LaCl ) must be employed and the sensitivity is decreased by a factor of
3
about two.
Metals, Ores, and Related Materials
E276 TestMethodforParticleSizeorScreenAnalysisatNo.
5. Significance and Use
4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and
Related Materials 5.1 This test method is intended as a referee method for
E663 Practice for FlameAtomicAbsorptionAnalysis (With- compliance with compositional specifications for impurity
3
drawn 1997) content. It is assumed that all who use this procedure will be
E882 Guide for Accountability and Quality Control in the trained analysts capable of performing common laboratory
Chemical Analysis Laboratory practices skillfully and safely. It is expected that work will be
performed in a properly equipped laboratory and that proper
wastedisposalprocedureswillbefollowed.Followappropriate
1 quality control practices such as those described in Guide
This test method is under the jurisdiction of ASTM Committee E01 on
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct E882.
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
6. Interferences
Current edition approved May 1, 2009. Published June 2009. Originally
approved in 1973. Last previous edition approved in 2008 as E508 – 08. DOI:
6.1 None of the elements normally found in iron ores
10.1520/E0508-09.
interfere with this test method (Note 1).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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
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
1
---------------------- Page: 1 ----------------------
E508 − 09
7.1.1 Minimum Sensitivity—The absorbance of the highest 20 mL of HCl and dilute to 200 mL with water. Add 20 g of
calibration solution (see 8.4) must be at least 0.3. sodium chloride dissolved in 200 mL water and dilute to 1 L
7.1.2 Curve-Linearity—Thedifferencebetweenthereadings with water.
ofthehighestca
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:E508–08 Designation:E508–09
Standard Test Method for
AnalysisDetermination of Calcium and Magnesium in Iron
1
Ores by Flame Atomic Absorption Spectrometry
This standard is issued under the fixed designation E 508; 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1193 Specification for Reagent Water
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related
Materials
E 135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E 276 TestMethodforParticleSizeorScreenAnalysisatNo.4(4.75-mm)SieveandFinerforMetal-BearingOresandRelated
Materials
3
E 663 Practice for Flame Atomic Absorption Analysis
E 882 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 E 135.
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
3
insoluble 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 spectrophotometryspectrometry 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 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 E 882.
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 Dec. 15, 2008.May 1, 2009. Published JanuaryJune 2009. Originally approved in 1973. Last previous edition approved in 20032008 as
E 508 – 038.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn. 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 ----------------------
E508–09
6. Interferences
6.1 None of the elements normally found in iron ores interfere with this test method (Note 1).
7. Apparatus
7.1 Atomic Absorption SpectrophotometerAtomic
...
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