GB/T 15072.20-2025 Active National standards

GB/T 15072.20-2025 Methods for chemical analysis of precious metal alloys—Part 20:Determination of rhodium content

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 15072.20-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Analysis methods for precious metals and their alloys

ICS Name: Other non-ferrous metals and their alloys

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 20 pages

Scope

This document describes the methods for determining the rhodium content in precious metal alloys using the cobalt hexamminonitrate gravimetric method and spectrophotometry.
In this document, the cobalt hexamminonitrate gravimetric method is suitable for determining the rhodium content in precious metal alloys, with a measurement range (mass fraction): 5.00%~95.00%; the spectrophotometry method is suitable for determining the rhodium content in platinum-palladium-rhodium alloys, with a measurement range (mass fraction): 3.00%～<5.00%.