Sets out spectrometric procedures for the determination of platinum and palladium in gold and gold bearing alloys by initial fire assay followed by flame atomic absorption spectrometry (FAAS) or inductively coupled plasma-atomic emission spectrometry (ICP-AES). The methods are applicable to gold and gold alloys containing less than 10 percent palladium and less than 10 percent platinum.
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 Definitions
4 Principle
5 Reagents
5.1 General requirements
5.2 Aqua regia
5.3 Hydrochloric acid (ρ20 1.18 g/mL)
5.4 Lanthanum solution (10% w/v)
5.5 Lead foil
5.6 Nitric acid (ρ20 1.42 g/mL)
5.7 Nitric acid (1:1)
5.8 Gold
5.9 Standard solutions
5.9.1 General
5.9.2 Standard palladium solution (1000 mg of Pd per litre)
5.9.3 Standard platinum solution (1000 mg of Pt per litre)
