ASTM E316-11
(Test Method)Standard Test Method for Determination of Iron in Manganese Ores by Hydrogen Sulfide Reduction-Dichromate Titrimetry
Standard Test Method for Determination of Iron in Manganese Ores by Hydrogen Sulfide Reduction-Dichromate Titrimetry
SIGNIFICANCE AND USE
This test method is intended to be used for compliance with compositional specifications for iron content in manganese ores. 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 iron in manganese ore in the range from 2 % to 20 %.
Note 1—As used in this test method (except as related to the term relative standard deviation), “percent” or “%” refers to mass fraction (wt/wt) of the form g/100g.
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:E316 −11
Standard Test Method for
Determination of Iron in Manganese Ores by Hydrogen
1
Sulfide Reduction-Dichromate Titrimetry
This standard is issued under the fixed designation E316; 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. Summary of Test Method
4.1 The sample is decomposed by treatment with
1.1 This test method covers the determination of iron in
hydrochloric, hydrofluoric, and sulfuric acids. Any residue is
manganese ore in the range from2%to20%.
treated for the recovery of insoluble iron. The iron is reduced
NOTE 1—As used in this test method (except as related to the term
with hydrogen sulfide, the insoluble sulfides are removed by
relative standard deviation), “percent” or “%” refers to mass fraction
filtration, and the excess hydrogen sulfide is expelled by
(wt/wt) of the form g/100g.
boiling. After cooling, the reduced iron is titrated with a
1.2 The values stated in SI units are to be regarded as
standard potassium dichromate solution using sodium diphe-
standard. No other units of measurement are included in this
nylamine sulfonate as the indicator.
standard.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 This test method is intended to be used for compliance
safety concerns, if any, associated with its use. It is the
with compositional specifications for iron content in manga-
responsibility of the user of this standard to establish appro-
nese ores. It is assumed that all who use these procedures will
priate safety and health practices and determine the applica-
be trained analysts capable of performing common laboratory
bility of regulatory limitations prior to use.
proceduresskillfullyandsafely.Itisexpectedthatworkwillbe
performed in a properly equipped laboratory and that proper
2. Referenced Documents
waste disposal procedures will be followed. Appropriate qual-
2
2.1 ASTM Standards:
ity control practices must be followed such as those described
D1193 Specification for Reagent Water
in Guide E882.
E50 Practices for Apparatus, Reagents, and Safety Consid-
6. Interferences
erations for Chemical Analysis of Metals, Ores, and
Related Materials
6.1 None of the elements normally found in manganese ore
E135 Terminology Relating to Analytical Chemistry for
interfere with this test method.
Metals, Ores, and Related Materials
7. Reagents and Materials
E882 Guide for Accountability and Quality Control in the
Chemical Analysis Laboratory
7.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
3. Terminology
all reagents conform to the specifications of the Committee on
Analytical Reagents of the American Chemical Society where
3.1 Definitions—For definitions of terms used in this test
3
such specifications are available . Other grades may be used,
method, refer to Terminology E135.
provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of
the determination.
1
This test method is under the jurisdiction of ASTM Committee E01 on
7.2 Purity of Water—Unless otherwise indicated, references
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
towatershallbeunderstoodtomeanreagentwaterconforming
lurgical Materials.
Current edition approved Sept. 1, 2011. Published September 2011. Originally
3
approved in 1967. Last previous edition approved in 2005 as E316 – 00 (2005). Reagent Chemical, American Chemical Society Specifications, American
DOI: 10.1520/E0316-11. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole Dorset, U. K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary,U.S.PharmaceuticalConvention,Inc.,(USPC),Rockville,
the ASTM website. MD
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E316−11
to Type I or II of Specification D1193. Type III or IV may be 10.2 Moisten the sample with a few millilitres of water, add
used if they effect no measurable change in the blank or 15 mL of HCl, cover and heat gently unti
...
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:E316–00(Reapproved2005) Designation: E316 – 11
Standard Test Method for
Determination of Iron in Manganese Ores by Hydrogen
1
Sulfide Reduction-Dichromate TitrationTitrimetry
This standard is issued under the fixed designation E316; 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
1.1This test method covers the determination of iron in manganese ore in the range from 2 to 20%.
1.1 This test method covers the determination of iron in manganese ore in the range from2%to20%.
NOTE 1—As used in this test method (except as related to the term relative standard deviation), “percent” or “%” refers to mass fraction (wt/wt) of
the form g/100g.
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: ASTM Standards:
D1193 Specification for Reagent Water
E50 PracticesforApparatus,Reagents,andSafetyConsiderationsforChemicalAnalysisofMetals,Ores,andRelatedMaterials
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
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 decomposed by treatment with hydrochloric, hydrofluoric, and sulfuric acids. Any residue is treated for the
recovery of insoluble iron. The iron is reduced with hydrogen sulfide, the insoluble sulfides are removed by filtration, and the
excess hydrogen sulfide is expelled by boiling. After cooling, the reduced iron is titrated with a standard potassium dichromate
solution using sodium diphenylamine sulfonate as the indicator.
5. Significance and Use
5.1 Thistestmethodisintendedtobeusedforcompliancewithcompositionalspecificationsforironcontentinmanganeseores.
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 None of the elements normally found in manganese ore interfere with this test method.
7. Reagents and Materials
7.1 Purity and Concentration of Reagents—The purity and concentration of the common chemical reagents used shall conform
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, 2005. Published October 2005. Originally approved in 1967. Last previous edition approved in 2000 as E316–00. DOI:
10.1520/E0316-00R05.
Current edition approved Sept. 1, 2011. Published September 2011. Originally approved in 1967. Last previous edition approved in 2005 as E316 – 00 (2005). DOI:
10.1520/E0316-11.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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E316 – 11
to Practices E50. Special apparatus and reagents required are located in separate sections preceding the procedure. Purity of
Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents conform
to the specifications of the Committee on Analytical Reagents of the American Chemical Society where such specifications are
3
available . Other grades may be used, provided it is first ascertained that the reagent is of suffici
...
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