ASTM E815-17b

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: E815 − 17a E815 − 17b
Standard Test Method for
Determination of Calcium Fluoride in Fluorspar by EDTA
1
Complexometric Titrimetry
This standard is issued under the fixed designation E815; 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 test method covers the determination of calcium fluoride in acid-grade fluorspar and other types of fluorspar that can
be rendered soluble by the procedure described in the test method.
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 test method has been evaluated in accordance with Practice E1601 and Guide E1763. Unless otherwise noted in the
precision and bias section, the lower limit in the scope of each method specifies the lowest analyte content that may be analyzed
with acceptable error (defined as a nominal 5 % risk of obtaining a 50 % or larger relative difference in results on the same test
sample in two laboratories).
1.4 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.
1.5 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
E276 Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and Related
Materials
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
E1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
E1763 Guide for Interpretation and Use of Results from Interlaboratory Testing of Chemical Analysis Methods (Withdrawn
3
2015)
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 digesting with HNO and HClO and the fluorine is expelled by fuming. The residue is
3 4
dissolved in dilute HCl, the solution made alkaline, and the calcium titrated with standard EDTA solution. Calcium present as
carbonate is determined in a separate sample with EDTA solution, after extracting the former with dilute acetic acid. A correction
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 Sept. 15, 2017Nov. 15, 2017. Published October 2017December 2017. Originally approved in 1981. Last previous edition approved in 2017 as
E815 – 17.17a. DOI: 10.1520/E0815-17A.10.1520/E0815-17B.
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E815 − 17b
for calcium fluoride, solubilized by dilute acetic acid digestion, is applied by determining the fluoride in the acetic acid extract by
fluoride ion-selective electrode. The CaF content is then calculated.
2
5. Significance and Use
5.1 Fluorspar is used as a flux in the steelmaking and glass industries, and in the manufacture of HF.
5.2 This test meth
...

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: E815 − 17b
Standard Test Method for
Determination of Calcium Fluoride in Fluorspar by EDTA
1
Complexometric Titrimetry
This standard is issued under the fixed designation E815; 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 Determine Conformance with Specifications
E50 Practices for Apparatus, Reagents, and Safety Consid-
1.1 This test method covers the determination of calcium
erations for Chemical Analysis of Metals, Ores, and
fluoride in acid-grade fluorspar and other types of fluorspar that
Related Materials
can be rendered soluble by the procedure described in the test
E135 Terminology Relating to Analytical Chemistry for
method.
Metals, Ores, and Related Materials
1.2 The values stated in SI units are to be regarded as
E276 Test Method for Particle Size or Screen Analysis at No.
standard. No other units of measurement are included in this
4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and
standard.
Related Materials
1.3 This test method has been evaluated in accordance with E882 Guide for Accountability and Quality Control in the
Chemical Analysis Laboratory
Practice E1601 and Guide E1763. Unless otherwise noted in
the precision and bias section, the lower limit in the scope of E1601 Practice for Conducting an Interlaboratory Study to
Evaluate the Performance of an Analytical Method
each method specifies the lowest analyte content that may be
analyzed with acceptable error (defined as a nominal 5 % risk E1763 Guide for Interpretation and Use of Results from
Interlaboratory Testing of Chemical Analysis Methods
of obtaining a 50 % or larger relative difference in results on
3
the same test sample in two laboratories). (Withdrawn 2015)
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions—For definitions of terms used in this test
responsibility of the user of this standard to establish appro-
method, refer to Terminology E135.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Summary of Test Method
1.5 This international standard was developed in accor-
4.1 The sample is decomposed by digesting with HNO and
dance with internationally recognized principles on standard-
3
HClO and the fluorine is expelled by fuming. The residue is
ization established in the Decision on Principles for the
4
dissolved in dilute HCl, the solution made alkaline, and the
Development of International Standards, Guides and Recom-
calcium titrated with standard EDTA solution. Calcium present
mendations issued by the World Trade Organization Technical
as carbonate is determined in a separate sample with EDTA
Barriers to Trade (TBT) Committee.
solution, after extracting the former with dilute acetic acid. A
2. Referenced Documents
correction for calcium fluoride, solubilized by dilute acetic acid
2
digestion, is applied by determining the fluoride in the acetic
2.1 ASTM Standards:
acid extract by fluoride ion-selective electrode. The CaF
2
D1193 Specification for Reagent Water
content is then calculated.
E29 Practice for Using Significant Digits in Test Data to
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee E01 on
5.1 Fluorspar is used as a flux in the steelmaking and glass
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
industries, and in the manufacture of HF.
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
5.2 This test method is intended to be used for compliance
Current edition approved Nov. 15, 2017. Published December 2017. Originally
with compositional specifications for calcium fluoride content.
approved in 1981. Last previous edition approved in 2017 as E815 – 17a. DOI:
It is assumed that all who use these procedures will be trained
10.1520/E0815-17B.
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E815 − 17b
analysts capable of performing common laboratory procedures 8.8 Potassium Hydroxide Solution A—Dissolve 225 g of
skillfully and safely. I
...