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AS 3515.1:2019

[Current]

Gold and gold bearing alloys, Part 1: Determination of gold content (less than 30%) — Gravimetric (fire assay) method

This Standard sets out gravimetric procedures for the determination of gold content in the range 0.2 % to 30 % in gold and gold bearing alloys with < 2 % nickel, < 0.05 % rhodium, < 0.05 % tungsten, < 0.05 % tin, < 1 % platinum and < 3 % palladium.
Published: 01/03/2019
Pages: 19
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Reagents
1.5 Apparatus
2 Sample preparation and preliminary determination
2.1 General
2.2 Sample inspection and preparation
2.3 Preliminary determination of the approximate total precious metals, gold, silver and total base metals content
2.3.1 General
2.3.2 Test portion preparation
2.3.3 Cupellation
2.3.4 Re-inquarting
2.3.5 Parting
2.3.6 Calculations
2.4 Criteria for selection of determination method
3 Total precious metals content less than 40 %
3.1 Scope of section
3.2 Principle
3.3 Number of determinations
3.4 Proof tests
3.5 Preparation of test portion and proof
3.6 Cupellation
3.7 Parting
3.8 Calculations
3.8.1 Change in mass of proof
3.8.2 Determination of surcharge
3.8.3 Adjusted mass of the gold cornet from the sample or test portion
3.8.4 Gold content
4 Total precious metals content is 40 % or greater
4.1 Scope of section
4.2 Principle
4.3 Number of determinations
4.4 Proof tests
4.5 Preparation of the test portion and proof
4.6 Cupellation
4.7 Parting
4.8 Calculations
4.8.1 Change in mass of proof
4.8.2 Determination of surcharge
4.8.3 Adjusted mass of the gold cornet
4.8.4 Gold content
5 Precision-and acceptance of results
5.1 Precision
5.2 Acceptance of results
5.2.1 Reference Standard
5.2.2 Test results
5.3 Test report
Appendix A
A.1 Scope
A.2 Criteria for selection of a method
A.3 Vacuum tube sampling
A.3.1 Principle
A.3.2 Procedure
A.4 Dip sampling
A.4.1 Principle
A.4.2 Sampling apparatus
A.4.3 Procedure
A.5 Sampling by clipping
A.6 Sampling by sawing
A.7 Sampling by drilling
Bibliography
Cited references in this standard
Content history
[Superseded]
DR AS 3515.1:2018
AS 3515.1-2005 Rec:2016