ISO 11494:2019
Jewellery and precious metals — Determination of platinum in platinum alloys — ICP-OES method using an internal standard element
This document describes an analytical procedure for the determination of platinum in platinum alloys with a nominal content up to 990 ‰ (parts per thousand), including alloys according to ISO 9202.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Equipment
7 Sampling
8 Procedure
8.1 Internal standard solution
8.2 Calibration solutions
8.3 Sample solutions
8.4 Preparation of the platinum alloy solution containing ruthenium, iridium, or tungsten
8.5 Measurements
9 Calculation and expression of results
9.1 Calculation
9.2 Repeatability
10 Test report
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Equipment
7 Sampling
8 Procedure
8.1 Internal standard solution
8.2 Calibration solutions
8.3 Sample solutions
8.4 Preparation of the platinum alloy solution containing ruthenium, iridium, or tungsten
8.5 Measurements
9 Calculation and expression of results
9.1 Calculation
9.2 Repeatability
10 Test report
Bibliography