ASTM E248-07
(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
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 E 882.
SCOPE
1.1 This definitive test method covers the determination of manganese in manganese ore in the range from 15 to 60 %.
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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Standards Content (Sample)
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Designation:E248–07
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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope the addition of sodium pyrophosphate and adjustment of the
acidity, the manganese is determined by oxidation to trivalent
1.1 This definitive test method covers the determination of
manganese with a standard solution of potassium permangan-
manganese in manganese ore in the range from 15 to 60 %.
ate. The end point is determined potentiometrically.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 This definitive test method is intended to be used as a
priate safety and health practices and determine the applica-
referee method for compliance with compositional specifica-
bility of regulatory limitations prior to use.
tions for manganese content. It is assumed that all who use
2. Referenced Documents theseprocedureswillbetrainedanalystscapableofperforming
2
common laboratory procedures skillfully and safely. It is
2.1 ASTM Standards:
expected that work will be performed in a properly equipped
D1193 Specification for Reagent Water
laboratory and that proper waste disposal procedures will be
E50 Practices for Apparatus, Reagents, and Safety Consid-
followed. Appropriate quality control practices must be fol-
erations for Chemical Analysis of Metals, Ores, and
lowed such as those described in Guide E882.
Related Materials
E135 Terminology Relating to Analytical Chemistry for
6. Interferences
Metals, Ores, and Related Materials
6.1 Provision has been made for removal of chromium,
E691 Practice for Conducting an Interlaboratory Study to
which, under some conditions, is an interfering element.
Determine the Precision of a Test Method
E882 Guide for Accountability and Quality Control in the
7. Apparatus
Chemical Analysis Laboratory
7.1 pH Meter equipped with calomel and glass electrodes.
3. Terminology 7.2 Potentiometric TitrationApparatus equipped with calo-
mel and platinum electrodes.Asuitable pH meter may be used
3.1 Definitions—For definitions of terms used in this test
for this purpose.
method, refer to Terminology E135.
7.3 Magnetic Stirrer—Use of a TFE-fluorocarbon covered
4. Summary of Test Method stirring bar is recommended.
4.1 The test sample is decomposed by treatment with
8. Reagents
hydrochloric, nitric, hydrofluoric, and perchloric acids. After
8.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
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This test method is under the jurisdiction of ASTM Committee E01 on
all reagents shall conform to the specifications of the Commit-
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
tee onAnalytical Reagents of theAmerican Chemical Society,
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
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where such specifications are available. Other grades may be
lurgical Materials.
Current edition approved June 1, 2007. Published June 2007. Originally
approved in 1964. Last previous edition approved in 2002 as E248 – 02. DOI:
3
10.1520/E0248-07. 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E248–07
used, provided it is first ascertained that the reagent is of 10. Sample Preparation
sufficiently high purity to permit its use without lessening the
10.1 The laboratory sample shall be pulverized, if neces-
accuracy of the determination.
sary, so that 100 % passes a No. 100 (150-µm) sieve.
8.2 Purity of Water—Unless otherwise indicated, references
11. Procedure
to water shall be un
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