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AS ISO 10378:2022
$213.50
Copper, lead and zinc sulfide concentrates – Determination of gold and silver – Fire assay gravimetric and flame atomic absorption spectrometric method
AS ISO 10378:2022 identically adopts ISO 10378:2016, which specifies a fire assay gravimetric and flame atomic absorption spectrometric method for the determination of the mass fraction of gold and silver in copper, lead, and zinc sulfide concentrates.
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
3.1 General
3.2 Fusion
3.3 Cupellation
3.4 Parting
3.5 Retreatment
3.6 Correction for blank contamination
4 Reagents
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.14.1
4.14.2
4.14.3
4.14.4
4.15
4.15.1
4.15.2
5 Apparatus
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
6 Sample
6.1 Test sample
6.2 Test portion
7 Procedure
7.1 Number of determinations
7.2 Trial fusion
7.3 Blank tests
7.4 Charge preparation
7.5 Primary fusion
7.6 Cupellation
7.7 Retreatment of residues
7.8 Determination of gold in the primary bead
7.9 Determination of gold and silver in secondary beads and blanks, and of silver in prills
7.10 Determination of silver in the parting solution
8 Expression of results
8.1 Mass fraction of gold
8.2 Mass fraction of silver
9 Precision
9.1 Expression of precision
9.2 Method for obtaining the final result (see Annex H)
9.3 Precision between laboratories
9.4 Check of trueness
9.4.1 General
9.4.2 Type of certified reference material (CRM) or reference material (RM)
9.4.2.1 Reference material certified/characterized by an interlaboratory test programme
9.4.2.2 Reference material certified/characterized by one laboratory
10 Test report
Annex A
A.1 General
A.2 Principle
A.3 Reagents
A.3.1
A.4 Apparatus
A.4.1
A.4.2
A.4.3
A.5 Procedure
A.5.1 Preparation of the weighing vessel
A.5.2 Test portion
A.5.3 Determination of the dry mass of test portion
A.6 Calculation of the dry mass of the test portion
Annex B
B.1 General
B.2 Procedure
Annex C
C.1 General
C.2 Procedure
Annex D
D.1 General
D.2 Procedure
Annex E
E.1 General
E.2 Procedure
E.3 Calculation of loss of silver during the cupellation process
E.4 Correction of mass fraction of silver of the test portion
