ASTM E738-11

Standard Test Method for Determination of Aluminum in Iron Ores and Related Materials by EDTA Complexometric Titrimetry (Withdrawn 2020)

SIGNIFICANCE AND USE
This test method for the analysis of iron ore concentrates and agglomerates is primarily intended as a referee method to test for compliance with compositional specifications. It is assumed that all who use this test method 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 shall be followed, such as those described in Guide E882.
SCOPE
1.1 This test method covers the determination of aluminum in iron ores, concentrates, and agglomerates in the compositional range from 0.25 % to 5 % aluminum.
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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2011
• ICS: 73.060.10 - Iron ores
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.02 - Ores, Concentrates, and Related Metallurgical Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E738 − 11
Standard Test Method for
Determination of Aluminum in Iron Ores and Related
1
Materials by EDTA Complexometric Titrimetry
This standard is issued under the fixed designation E738; 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
2
1.1 This test method covers the determination of aluminum
3.1 Definitions—For definitions of terms used in this test
in iron ores, concentrates, and agglomerates in the composi-
method, refer to Terminology E135.
tional range from 0.25 % to 5 % aluminum.
NOTE 1—As used in this test method (except as related to the term
4. Summary of Test Method
relative standard deviation), “percent” or “%” refers to mass fraction
(wt/wt) of the form g/100g. 4.1 The sample is fused in a zirconium crucible with a
mixed flux of sodium carbonate and sodium peroxide. The
1.2 The values stated in SI units are to be regarded as
fused mass is dissolved in dilute HCL. The R O (Note 2)
2 3
standard. No other units of measurement are included in this
hydroxides are precipitated with ammonia and redissolved in
standard.
HCL. Iron, titanium, and so forth, are removed with cupferron
1.3 This standard does not purport to address all of the
and chloroform. The aqueous phase is treated with H NO and
2 3
safety concerns, if any, associated with its use. It is the
HClO and evaporated to dryness. After dissolving in dilute
4
responsibility of the user of this standard to establish appro-
HCL, the solution is filtered, and the filtrate is treated with an
priate safety and health practices and determine the applica-
excess of ethylenediaminetetraacetic acid (EDTA). The excess
bility of regulatory limitations prior to use.
EDTA is titrated with a standard zinc solution using xylenol
orange indicator. Ammonium fluoride is added to release the
2. Referenced Documents
EDTA bound to aluminum. This EDTA is then titrated with
3
2.1 ASTM Standards:
standard zinc solution, and the percent aluminum is calculated.
D1193 Specification for Reagent Water
NOTE 2—R O hydroxides are rare earth sesquioxides such as La O ,
2 3 2 3
E50 Practices for Apparatus, Reagents, and Safety Consid-
Y O,Ce O,Gd O , and Eu O .
2 3 2 3 2 3 2 3
erations for Chemical Analysis of Metals, Ores, and
Related Materials
5. Significance and Use
E135 Terminology Relating to Analytical Chemistry for
5.1 Thistestmethodfortheanalysisofironoreconcentrates
Metals, Ores, and Related Materials
and agglomerates is primarily intended as a referee method to
E877 Practice for Sampling and Sample Preparation of Iron
test for compliance with compositional specifications. It is
Ores and Related Materials for Determination of Chemi-
assumed that all who use this test method will be trained
cal Composition
analysts capable of performing common laboratory procedures
E882 Guide for Accountability and Quality Control in the
skillfully and safely. It is expected that work will be performed
Chemical Analysis Laboratory
in a properly equipped laboratory and that proper waste
disposal procedures will be followed. Appropriate quality
1
This test method is under the jurisdiction of ASTM Committee E01 on
control practices shall be followed, such as those described in
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
Guide E882.
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
Current edition approved Sept. 1, 2011. Published September 2011. Originally
6. Interferences
approvedin1980.Lastpreviouseditionapprovedin2005asE738–00(2005).DOI:
10.1520/E0738-11.
6.1 None of the elements normally found in iron ores
2
Bhargava, O. P., “Complexometric Determination of Aluminum in Iron Ore,
interfere with this test method.
Sinter, Concentrates, and Agglomerates,” Talanta, Vol 26, 1979, pp. 146 to 148.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7. Apparatus
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 7.1 Zirconium Crucible, 50-mL.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E738 − 11
8. Reagents and Materials dropwise addition of sodium hydroxide solution B, adjust the
pH to 4. Dilute to 1 L with water in a volumetric flask.
8.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
9. Hazards
all reagents conform to the specific
...

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:E738–00(Reapproved 2005) Designation:E738–11
Standard Test Method for
Determination of Aluminum in Iron Ores and Related
1
Materials by EDTA Complexometric TitrationTitrimetry
This standard is issued under the fixed designation E738; 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
2
1.1 This test method covers the determination of aluminum in iron ores, concentrates, and agglomerates in the concentration
range from 0.25 to 5% aluminum. covers the determination of aluminum in iron ores, concentrates, and agglomerates in the
compositional range from 0.25 % to 5 % aluminum.
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
3
2.1 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
E877 Practice for Sampling and Sample Preparation of Iron Ores and Related Materials for Determination of Chemical
Composition
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 fused in a zirconium crucible with a mixed flux of sodium carbonate and sodium peroxide. The fused mass
is dissolved in dilute hydrochloric acid.HCL. The R O hydroxides are precipitated with ammonia and redissolved in hydrochloric
2 3
acid. Iron, titanium, and so forth, are removed with cupferron and chloroform. The aqueous phase is treated with nitric and
perchloric acids and evaporated to dryness. After dissolving in dilute hydrochloric acid, the solution is filtered, and the filtrate is
treated with an excess of ethylenediaminetetraacetic acid (EDTA).The excess EDTAis titrated with a standard zinc solution using
xylenol orange indicator.Ammonium fluoride is added to release the EDTAbound to aluminum. This EDTAis then titrated with
standard zinc solution, and the percent aluminum is calculated. (Note 2) hydroxides are precipitated with ammonia and
redissolved in HCL. Iron, titanium, and so forth, are removed with cupferron and chloroform. The aqueous phase is treated with
H NO and HClO and evaporated to dryness. After dissolving in dilute HCL, the solution is filtered, and the filtrate is treated
2 3 4
withanexcessofethylenediaminetetraaceticacid(EDTA).TheexcessEDTAistitratedwithastandardzincsolutionusingxylenol
orange indicator.Ammonium fluoride is added to release the EDTAbound to aluminum. This EDTAis then titrated with standard
zinc solution, and the percent aluminum is calculated.
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 1980. Last previous edition approved in 2000 as E738–00. DOI:
10.1520/E0738-00R05.
Current edition approved Sept. 1, 2011. Published September 2011. Originally approved in 1980. Last previous edition approved in 2005 as E738 – 00(2005). DOI:
10.1520/E0738-11.
2
Bhargava, O. P., “Complexometric Determination of Aluminum in Iron Ore, Sinter, Concentrates, and Agglomerates,” Talanta, Vol 26, 1979, pp. 146 to 148.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. 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,
...