ASTM E248-02
(Test Method)Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry
Test Method for Determination of Manganese in Manganese Ores by Pyrophosphate Complexed Permanganate Potentiometric Titrimetry
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E248–02
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 E 248; 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 (e) 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 manganese with a standard solution of potassium permangan-
ate. The end point is determined potentiometrically.
1.1 This definitive test method covers the determination of
manganese in manganese ore in the range from 15 to 60 %.
5. Significance and Use
1.2 This standard does not purport to address all of the
5.1 This definitive test method is intended to be used as a
safety concerns, if any, associated with its use. It is the
referee method for compliance with compositional specifica-
responsibility of the user of this standard to establish appro-
tions for manganese content. It is assumed that all who use
priate safety and health practices and determine the applica-
theseprocedureswillbetrainedanalystscapableofperforming
bility of regulatory limitations prior to use.
common laboratory procedures skillfully and safely. It is
2. Referenced Documents expected that work will be performed in a properly equipped
laboratory and that proper waste disposal procedures will be
2.1 ASTM Standards:
2
followed. Appropriate quality control practices must be fol-
D 1193 Specification for Reagent Water
lowed such as those described in Guide E 882.
E 50 Practices for Apparatus, Reagents, and Safety Precau-
3
tions for Chemical Analysis of Metals
6. Interferences
E 135 Terminology Relating to Analytical Chemistry for
3 6.1 Provision has been made for removal of chromium
Metals, Ores and Related Materials
which, under some conditions, is an interfering element.
E 691 Practice for Conducting an Interlaboratory Study to
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Determine the Precision of a Test Method
7. Apparatus
E 882 Guide for Accountability and Quality Control in the
7.1 pH Meter equipped with calomel and glass electrodes.
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Chemical Analysis of Metals
7.2 Potentiometric Titration Apparatus equipped with
calomel and platinum electrodes. A suitable pH meter may be
3. Terminology
used for this purpose.
3.1 Definitions—For definitions of terms used in this test
7.3 Magnetic Stirrer—Use of a TFE-fluorocarbon covered
method, refer to Terminology E 135.
stirring bar is recommended.
4. Summary of Test Method
8. Reagents
4.1 The test sample is decomposed by treatment with
8.1 Purity of Reagents—Reagent grade chemicals shall be
hydrochloric, nitric, hydrofluoric, and perchloric acids. After
used in all tests. Unless otherwise indicated, it is intended that
the addition of sodium pyrophosphate and adjustment of the
all reagents shall conform to the specifications of the Commit-
acidity, the manganese is determined by oxidation to trivalent
tee onAnalytical Reagents of theAmerican Chemical Society,
6
where such specifications are available. Other grades may be
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This test method is under the jurisdiction of ASTM Committee E01 on used, provided it is first ascertained that the reagent is of
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurigical Materials.
Current edition approved May 10, 2002. Published May 2002. Originally
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published as E 248 – 64 T. Last previous edition E 248 – 97. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
2
Annual Book of ASTM Standards, Vol 11.01. cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
3
Annual Book of ASTM Standards, Vol 03.05. theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
4
Annual Book of ASTM Standards, Vol 14.02. Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United States
5
Annual Book of ASTM Standards, Vol 03.06. Pharmacopeia.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E248
sufficiently high purity to permit its use without lessening the 10. Sample Preparation
accuracy of the determination.
10.1 The laboratory sample shall be pulverized, if neces-
8.2 Purity of Water—Unless otherwise indicated, references
sary, so that 100 % passes a No. 100 (150-µm) sieve.
to water shall be understood to mean reagent water conforming
11. Procedure
to Specification D 1193.
11.1 Transfer approximately 0.40 g (or 0.30 g if the man-
8.3 Hydrochloric Acid (sp gr
...
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