ASTM E248-20
(Test Method)Standard Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry
Standard Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry
SIGNIFICANCE AND USE
5.1 This test method is intended to be used as a referee method for compliance with compositional specifications for manganese 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 E882.
SCOPE
1.1 This test method covers the determination of manganese in manganese ore in the range from 15 % to 60 %.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.3 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
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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: E248 − 20
Standard Test Method for
Determination of Manganese in Manganese Ores by
Pyrophosphate Complexed Permanganate Potentiometric
1
Titrimetry
This standard is issued under the fixed designation E248; 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 3. Terminology
3.1 Definitions—For definitions of terms used in this test
1.1 Thistestmethodcoversthedeterminationofmanganese
method, refer to Terminology E135.
in manganese ore in the range from 15% to 60%.
1.2 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 The test sample is decomposed by treatment with HCl,
responsibility of the user of this standard to establish appro-
HNO ,HF,andHClO .Aftertheadditionofsodiumpyrophos-
3 4
priate safety, health, and environmental practices and deter-
phate (Na P O ·10H O) and adjustment of the acidity, the
4 2 7 2
mine the applicability of regulatory limitations prior to use.
manganese is determined by oxidation to trivalent manganese
1.3 This international standard was developed in accor-
withastandardsolutionofpotassiumpermanganate(KMnO ).
4
dance with internationally recognized principles on standard-
The end point is determined potentiometrically.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Significance and Use
mendations issued by the World Trade Organization Technical
5.1 This test method is intended to be used as a referee
Barriers to Trade (TBT) Committee.
method for compliance with compositional specifications for
manganese content. It is assumed that all who use these
2. Referenced Documents
procedures will be trained analysts capable of performing
2
2.1 ASTM Standards:
common laboratory procedures skillfully and safely. It is
D1193Specification for Reagent Water
expected that work will be performed in a properly equipped
E29Practice for Using Significant Digits in Test Data to
laboratory and that proper waste disposal procedures will be
Determine Conformance with Specifications
followed. Appropriate quality control practices must be fol-
E50Practices for Apparatus, Reagents, and Safety Consid-
lowed such as those described in Guide E882.
erations for Chemical Analysis of Metals, Ores, and
6. Interferences
Related Materials
E135Terminology Relating to Analytical Chemistry for
6.1 Provision has been made for removal of chromium,
Metals, Ores, and Related Materials
which, under some conditions, is an interfering element.
E691Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method 7. Apparatus
E882Guide for Accountability and Quality Control in the
7.1 pH Meter equipped with calomel and glass electrodes.
Chemical Analysis Laboratory
7.2 Potentiometric Titration Apparatus equipped with calo-
mel and platinum electrodes.Asuitable pH meter may be used
for this purpose.
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 7.3 Magnetic Stirrer—Use of a TFE-fluorocarbon covered
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
stirring bar is recommended.
lurgical Materials.
CurrenteditionapprovedJuly1,2020.PublishedJuly2021.Originallyapproved
8. Reagents
in 1964. Last previous edition approved in 2012 as E248–12. DOI: 10.1520/
E0248-20.
8.1 Purity of Reagents—Reagent grade chemicals shall be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
used in all tests. Unless otherwise indicated, it is intended that
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
all reagents shall conform to the specifications of the Commit-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tee onAnalytical Reagents of theAmerican Chemical Society,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E248 − 20
3
where such specifications are available. Other grades may be 9. Hazards
used, provided it is first ascertained that the reagent is of
9.1 For precautions to be observed in this method, refer to
sufficiently high purity to permit its use without lessening the
Practice E50.
accuracy of the determination.
8.2 Purity of Water
...
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: E248 − 12 E248 − 20
Standard Test Method for
Determination of Manganese in Manganese Ores by
Pyrophosphate Complexed Permanganate Potentiometric
1
Titrimetry
This standard is issued under the fixed designation E248; 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 definitive test method covers the determination of manganese in manganese ore in the range from 15 % to 60 %.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.3 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
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
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 test sample is decomposed by treatment with HCL,HCl, HNO , HF, and HClO . After the addition of sodium
3 4
pyrophosphate (Na P O ·10H O) and adjustment of the acidity, the manganese is determined by oxidation to trivalent manganese
4 2 7 2
with a standard solution of potassium permanganate. permanganate (KMnO ). The end point is determined potentiometrically.
4
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 June 1, 2012July 1, 2020. Published July 2012July 2021. Originally approved in 1964. Last previous edition approved in 20072012 as
E248 – 07.E248 – 12. DOI: 10.1520/E0248-12.10.1520/E0248-20.
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 the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E248 − 20
5. Significance and Use
5.1 This definitive test method is intended to be used as a referee method for compliance with compositional specifications for
manganese 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 E882.
6. Interferences
6.1 Provision has been made for removal of chromium, which, under some conditions, is an interfering element.
7. Apparatus
7.1 pH Meter equipped with calomel and glass electrodes.
7.2 Potentiometric Titration Apparatus equipped with calomel and platinum electrodes. A suitable pH meter may be used for this
purpose.
7.3 Magnetic Stirrer—Use of a TFE-fluorocarbon covered stirring bar is recommended.
8. Reagents
8.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
3
such specifications are available. Other grades may be
...
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