Sets out a procedure for indirect determination of high purity gold after determination of impurities by Inductively Coupled Plasma-Atomic Emission Spectrometry ICP-AES. The method is suitable for gold and gold alloys containing more than 99.95 percent gold.
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 Hydrochloric acid (ρ20 1.18 g/mL)
5.3 Hydrochloric acid (1:1)
5.4 Hydrochloric acid (10% v/v)
5.5 Hydrochloric acid 1%(v/v)
5.6 Hydrofluoric acid (ρ20 1.17 g/mL)
5.7 Hydrofluoric acid 4% v/v
5.8 Nitric acid (ρ20 1.42 g/mL)
5.9 Nitric acid (10% v/v)
5.10 Nitric acid (1:1)
5.11 Aqua regia
5.12 Aqua regia 10% (v/v) solution
5.13 Sodium Hydroxide solution (20%)
5.14 Standard solutions
5.14.1 General
5.14.2 Standard aluminium solution (1000 mg of Al per litre)
5.14.3 Standard arsenic solution (1000 mg of As per litre)
5.14.4 Standard beryllium solution (1000 mg of Be per litre)
5.14.5 Standard bismuth solution (1000 mg of Bi per litre)
5.14.6 Standard calcium solution (1000 mg of Ca per litre)
5.14.7 Standard chromium solution (1000 mg of Cr per litre)
5.14.8 Standard copper solution (1000 mg of Cu per litre)
5.14.9 Standard iridium solution (1000 mg of Ir per litre)
5.14.10 Standard iron solution (1000 mg of Fe per litre)
5.14.11 Standard lead solution (1000 mg of Pb per litre)
5.14.12 Standard magnesium solution (1000 mg of Mg per litre)
5.14.13 Standard manganese solution (1000 mg of Mn per litre)
5.14.14 Standard nickel solution (1000 mg of Ni per litre)
5.14.15 Standard palladium solution (1000 mg of Pd per litre)
5.14.16 Standard platinum solution (1000 mg of Pt per litre)
5.14.17 Standard rhodium solution (1000 mg of Rh per litre)
5.14.18 Standard selenium solution (1000 mg of Se per litre)
5.14.19 Standard silicon solution (1000 mg of Si per litre)
5.14.20 Standard silver solution (100 mg of Ag per litre)
5.14.21 Standard tellurium solution (1000 mg of Te per litre)
5.14.22 Standard tin solution (1000 mg of Sn per litre)
5.14.23 Standard titanium solution (1000 mg of Ti per litre)
5.14.24 Standard zinc solution (1000 mg of Zn per litre)
