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ASTM E1568-21

(Test Method)

Standard Test Method for Determination of Gold in Activated Carbon by Fire Assay Gravimetry

Standard Test Method for Determination of Gold in Activated Carbon by Fire Assay Gravimetry

SIGNIFICANCE AND USE
5.1 In the primary metallurgical processes used by the mineral processing industry for gold bearing ores, gold is extracted with alkaline cyanide solutions and adsorbed onto activated carbon for recovery of the metal. Metallurgical accounting, process control, and ore evaluation procedures for this type of mineral processing plant depend on accurate, precise, and prompt measurements of gold concentrations in the activated carbon.  
5.2 This test method for gold in activated carbon is intended primarily as a referee method to test such materials for metal content. It is assumed that those 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 gold in activated carbon by fire assay collection and gravimetric measurement. It covers the range of 15 μg/g to 5000 μg/g gold.  
1.2 Units—The values stated in SI units are to be regarded as the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazards statements, see Section 9, 11.2.3 – 11.2.5, and 11.3.4.  
1.4 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
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
E01 - Analytical Chemistry for Metals, Ores, and Related Materials
Drafting Committee
E01.02 - Ores, Concentrates, and Related Metallurgical Materials
Current Stage
Ref Project

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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: E1568 − 21
Standard Test Method for
Determination of Gold in Activated Carbon by Fire Assay
1
Gravimetry
This standard is issued under the fixed designation E1568; 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 erations for Chemical Analysis of Metals, Ores, and
Related Materials
1.1 This test method covers the determination of gold in
E135 Terminology Relating to Analytical Chemistry for
activated carbon by fire assay collection and gravimetric
Metals, Ores, and Related Materials
measurement.Itcoverstherangeof15 µg⁄gto5000 µg⁄ggold.
E173 Practice for Conducting Interlaboratory Studies of
1.2 Units—The values stated in SI units are to be regarded
Methods for Chemical Analysis of Metals (Withdrawn
as the standard. No other units of measurement are included in 3
1998)
this standard.
E276 Test Method for Particle Size or Screen Analysis at
1.3 This standard does not purport to address all of the
4.75 mm (No. 4) Sieve and Finer for Metal-Bearing Ores
safety concerns, if any, associated with its use. It is the and Related Materials
responsibility of the user of this standard to establish appro-
E300 Practice for Sampling Industrial Chemicals
priate safety, health, and environmental practices and deter- E882 Guide for Accountability and Quality Control in the
mine the applicability of regulatory limitations prior to use.
Chemical Analysis Laboratory
For specific hazards statements, see Section 9, 11.2.3 – 11.2.5, E1601 Practice for Conducting an Interlaboratory Study to
and 11.3.4.
Evaluate the Performance of an Analytical Method
1.4 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 test
Development of International Standards, Guides and Recom-
method, refer to Terminology E135.
mendations issued by the World Trade Organization Technical
4. Summary of Test Method
Barriers to Trade (TBT) Committee.
4.1 The weighed test sample is ignited and fused with fire
2. Referenced Documents
assay flux in a clay crucible. The lead metal from the fusion is
2
2.1 ASTM Standards: separated and the precious metals concentrated by oxidation
D2862 Test Method for Particle Size Distribution of Granu- and adsorption of the lead on a cupel.The gold is annealed and
lar Activated Carbon the silver is parted with nitric acid. The mass is determined on
D2866 Test Method for Total Ash Content of Activated a semi-microbalance.
Carbon
5. Significance and Use
D2867 Test Methods for Moisture in Activated Carbon
E29 Practice for Using Significant Digits in Test Data to
5.1 In the primary metallurgical processes used by the
Determine Conformance with Specifications
mineral processing industry for gold bearing ores, gold is
E50 Practices for Apparatus, Reagents, and Safety Consid-
extracted with alkaline cyanide solutions and adsorbed onto
activated carbon for recovery of the metal. Metallurgical
accounting, process control, and ore evaluation procedures for
1
This test method is under the jurisdiction of ASTM Committee E01 on
this type of mineral processing plant depend on accurate,
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
precise, and prompt measurements of gold concentrations in
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
the activated carbon.
lurgical Materials.
Current edition approved Nov. 15, 2021. Published December 2021. Originally
5.2 This test method for gold in activated carbon is intended
approved in 1993. Last previous edition approved in 2013 as E1568 – 13. DOI:
primarily as a referee method to test such materials for metal
10.1520/E1568-21.
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 ----------------------
E1568 − 21
content. It is assumed that those who use these procedures will 8.6 Litharge (PbO)—Lead oxide powder, with gold content
be trained analysts capabl
...

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: E1568 − 13 E1568 − 21
Standard Test Method for
Determination of Gold in Activated Carbon by Fire Assay
1
Gravimetry
This standard is issued under the fixed designation E1568; 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 gold in activated carbon by fire assay collection and gravimetric measurement.
It covers the range of 15 μg ⁄g to 5000 μg ⁄g gold.
1.2 Units—The values stated in SI units are to be regarded as the 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific hazards statements, see Section 9 and , 11.2.3 – 11.2.5, 11.3.4, and
11.3.4.
1.4 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:
D2862 Test Method for Particle Size Distribution of Granular Activated Carbon
D2866 Test Method for Total Ash Content of Activated Carbon
D2867 Test Methods for Moisture in Activated Carbon
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
3
E173 Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals (Withdrawn 1998)
E276 Test Method for Particle Size or Screen Analysis at 4.75 mm (No. 4) Sieve and Finer for Metal-Bearing Ores and Related
Materials
E300 Practice for Sampling Industrial Chemicals
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
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 April 1, 2013Nov. 15, 2021. Published June 2013December 2021. Originally approved in 1993. Last previous edition approved in 20082013 as
ε1
E1568 – 03 (2008)E1568 – 13. . DOI: 10.1520/E1568-13.10.1520/E1568-21.
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 ----------------------
E1568 − 21
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 weighed test sample is ignited and fused with fire assay flux in a clay crucible. The lead metal from the fusion is separated
and the precious metals concentrated by oxidation and adsorption of the lead on a cupel, cupel. The gold is annealed and the silver
is parted with nitric acid, and the gold is annealed and weighed on a microbalance.acid. The mass is determined on a
semi-microbalance.
5. Significance and Use
5.1 In the primary metallurgical processes used by the mineral processing industry for gold bearing ores, gold is extracted with
alkaline cyanide solutions and adsorbed onto activated carbon for recovery of the metal. Metallurgical accounting, process control,
and ore evaluation procedures for this type of mineral processing plant depend on accurate, precise, and prompt measurements of
gold concentrations in the a
...

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4.2 This test method assumes that the amount of color developed is proportional to the amount of iron in the test solution. The calibration curve is linear over the specified range.
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1.5 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first-aid procedures, and safety precautions.  
1.6 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. For specific warning statements, see Section 8.  
1.7 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.

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ASTM
ASTM B1011/B1011M-22(Specification)
Standard Specification for Cobalt Alloy Spring Wire

SCOPE
1.1 This specification covers cold-drawn cobalt alloy spring wire intended especially for the manufacture of springs.  
1.1.1 This specification requires capability properties after age hardening test samples of the cold worked spring wire to ensure final mechanical properties are satisfied. The spring is typically age hardened after fabrication to increase its strength. However, mechanical properties cannot be obtained from finished springs.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units.  
1.4 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.

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  • Technical specification
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