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BS ISO 10378:2016 Copper, lead and zinc sulfide concentrates. Determination of gold and silver. Fire assay gravimetric and flame atomic absorption spectrometric method >
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BS ISO 10378:2016 Copper, lead and zinc sulfide concentrates. Determination of gold and silver. Fire assay gravimetric and flame atomic absorption spectrometric method, 2016
- 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
- 5 Apparatus
- 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)
- 10 Test report
- Annex A (normative) Procedure for the preparation and determination of the mass of a predried test portion
- Annex B (normative) Trial fusion
- Annex C (normative) Blank determination
- Annex D (normative) Inquartation
- Annex E (normative) Determination of vaporization loss of silver during the cupellation process
- Annex F (normative) Sulfuric acid — Parting
- Annex G (normative) Determination of impurities in parting solutions and washings
- Annex H (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples (see 9.2)
- Annex I (informative) Flowsheet of the method
- Annex J (informative) Roasting method
- Annex K (informative) Guide to the preparation of dilutions for the determination of silver in parting solutions and residues
- Annex L (informative) Derivation of precision equations
- Bibliography [Go to Page]