ASTM E2295-21

Standard Practice for Fire Assay Silver Corrections in Analysis of Metal Bearing Ores, Concentrates, and Related Metallurgical Materials by Silver Determination in Slags and Cupels

SIGNIFICANCE AND USE
5.1 These methods are primarily intended to be used for the determination of silver correction in the fire assay silver determination. Silver assays are determined by fire assay for the purpose of metallurgical exchange between seller and buyer.  
5.2 It is assumed that all who use this method will be trained analysts capable of performing skillfully and safely. It is expected that work will be performed in a properly equipped laboratory under appropriate quality control practices such as those described in Guide E882.
SCOPE
1.1 This practice covers the determination of silver corrections for fire assay of metal bearing ores, concentrates, and related metallurgical materials using the spent slags and cupels from the fire assay process, by gravimetry and atomic absorption spectrophotometry.  
1.2 The test methods appear in the following order:    
Sections  
Gravimetric Method  
10–11  
Atomic Absorption Method  
12–13  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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. (See Practices E50 and ISO Guide 35:1989.)  
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.

General Information

• Status: Published
• Publication Date: 14-Nov-2021
• ICS: 73.060.01 - Metalliferous minerals in general
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.02 - Ores, Concentrates, and Related Metallurgical Materials

Standards Content (Sample)

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.
Designation: E2295 − 21
Standard Practice for
Fire Assay Silver Corrections in Analysis of Metal Bearing
Ores, Concentrates, and Related Metallurgical Materials by
1
Silver Determination in Slags and Cupels
This standard is issued under the fixed designation E2295; 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 E50 Practices for Apparatus, Reagents, and Safety Consid-
erations for Chemical Analysis of Metals, Ores, and
1.1 This practice covers the determination of silver correc-
Related Materials
tions for fire assay of metal bearing ores, concentrates, and
E135 Terminology Relating to Analytical Chemistry for
related metallurgical materials using the spent slags and cupels
Metals, Ores, and Related Materials
from the fire assay process, by gravimetry and atomic absorp-
E882 Guide for Accountability and Quality Control in the
tion spectrophotometry.
Chemical Analysis Laboratory
1.2 The test methods appear in the following order:
E1024 Guide for Chemical Analysis of Metals and Metal
Sections
Bearing Ores by Flame Atomic Absorption Spectropho-
Gravimetric Method 10–11
3
tometry (Withdrawn 2004)
Atomic Absorption Method 12–13
E1335 Test Methods for Determination of Gold in Bullion
1.3 Units—The values stated in SI units are to be regarded
by Fire Assay Cupellation Analysis
as standard. No other units of measurement are included in this
4
standard. 2.2 ISO Documents:
ISO Guide 35:1989 Certification of Reference Materials—
1.4 This standard does not purport to address all of the
General and Statistical Principles
safety concerns, if any, associated with its use. It is the
ISO 10378:2016 Copper Sulfide Concentrates—
responsibility of the user of this standard to establish appro-
Determination of Gold and Silver Contents—Fire Assay
priate safety, health, and environmental practices and deter-
Gravimetric and Atomic Absorption Spectrometric
mine the applicability of regulatory limitations prior to use.
Method
(See Practices E50 and ISO Guide 35:1989.)
1.5 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3.1 Definitions—For definitions of terms used in this
Development of International Standards, Guides and Recom-
practice, refer to Terminology E135.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Practice
2. Referenced Documents
4.1 In the process of fire assay fusion slags and cupels are
2
2.1 ASTM Standards: collected, retreated and silver is determined in them to provide
a correction value for the fire assay determination of silver (see
D1193 Specification for Reagent Water
5
E29 Practice for Using Significant Digits in Test Data to GuideE1024,TestMethodsE1335,ISO 10378:2016,Bugbee,
6
and Smith ).
Determine Conformance with Specifications
1
This practice is under the jurisdiction of ASTM Committee E01 on Analytical
3
Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of The last approved version of this historical standard is referenced on
Subcommittee E01.02 on Ores, Concentrates, and Related Metallurgical Materials. www.astm.org.
4
Current edition approved Nov. 15, 2021. Published December 2021. Originally Available from International Organization for Standardization (ISO), ISO
approved in 2003. Last previous edition approved in 2013 as E2295 – 13. DOI: Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
10.1520/E2295-21. Switzerland, https://www.iso.org.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Bugbee, E. E., A Textbook of Fire Assaying, Third Ed., John Wiley and Sons,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Inc., Hoboken, NJ, 1946.
6
Standards volume information, refer to the standard’s Document Summary page on Smith, E. A., The Sampling and Assay of the Precious Metals, Second Ed.,
the ASTM website. Charles Griffin and Co., Ltd., 1947.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2295 − 21
5. Significance and Use 8.2 All precautions and safe laboratory operating proce-
dures should be followed when using HClO .
4
5.1 These methods are primarily intended to be used for the
determination of silver co
...

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: E2295 − 13 E2295 − 21
Standard Practice for
Fire Assay Silver Corrections in Analysis of Metal Bearing
Ores, Concentrates, and Related Metallurgical Materials by
1
Silver Determination in Slags and Cupels
This standard is issued under the fixed designation E2295; 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 practice covers the determination of silver corrections for fire assay of metal bearing ores, concentrates, and related
metallurgical materials using the spent slags and cupels from the fire assay process, by gravimetry and atomic absorption
spectrophotometry.
1.2 The test methods appear in the following order:
Sections
Gravimetric Method 10–11
Atomic Absorption Method 12–13
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. (See Practices E50 and ISO Guide 35:1989.)
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
E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
1
This practice 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 Nov. 1, 2013Nov. 15, 2021. Published December 2013December 2021. Originally approved in 2003. Last previous edition approved in 20082013
ε1
as E2295 – 03E2295 – 13. (Reapproved 2008) . DOI: 10.1520/E2295-13.10.1520/E2295-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2295 − 21
E1024 Guide for Chemical Analysis of Metals and Metal Bearing Ores by Flame Atomic Absorption Spectrophotometry
3
(Withdrawn 2004)
E1335 Test Methods for Determination of Gold in Bullion by Fire Assay Cupellation Analysis
4
2.2 ISO Documents:
ISO Guide 35:1989 Certification of Reference Materials—General and Statistical Principles
ISO 10378:1994ISO 10378:2016 Copper Sulfide Concentrates—Determination of Gold and Silver Contents—Fire Assay
Gravimetric and Atomic Absorption Spectrometric Method
3. Terminology
3.1 Definitions—For definitions of terms used in this practice, refer to Terminology E135.
4. Summary of Practice
4.1 In the process of fire assay fusion slags and cupels are collected, retreated and silver is determined in them to provide a
correction value for the fire assay determination of silver (see Guide E1024, Test Methods E1335, ISO 10378:1994,
5 6
ISO 10378:2016, Bugbee, and Smith ).
5. Significance and Use
5.1 These methods are primarily intended to be used for the determination of silver correction in the fire assay silver
determination. Silver assays are determined by fire assay for the purpose of metallurgical exchange between seller and buyer.
5.2 It is assumed that all who use this method will be trained analysts capable of performing skillfully and safely. It is expected
that work will be performed in a properly equipped laborat
...