Swiss precious metals assay controls have been put through a round robin analysis coordinated by the London Bullion Market Association, a process designed to verify the accuracy and consistency of testing methods used across the industry.
The London Bullion Market Association has published findings from a round robin analysis examining Swiss precious metals control standards — a technical but important exercise that underpins the integrity of the global bullion market.
Round robin analyses are quality-assurance tests in which the same sample material is sent to multiple laboratories. Each lab independently assays the sample, and the results are compared. The goal is to identify any systematic errors or inconsistencies between testing facilities, ensuring that a bar refined or assayed in one location meets the same standard as one processed elsewhere.
Switzerland is a central hub for precious metals refining. Several of the world’s largest and most respected refiners operate there, and Swiss-origin bars are a common sight in vaults and trading networks worldwide. When control standards in Switzerland are reviewed, the implications touch the broader international supply chain for gold, silver, platinum, and palladium.
For market participants, the credibility of assay controls directly affects confidence in Good Delivery bars — the standard unit of trade on the London market. Any divergence in testing methodology between labs could, in principle, create uncertainty about a bar’s true metal content, which is why periodic independent verification matters.
The LBMA sets and maintains the Good Delivery List, which governs which refiners and vaults are accepted counterparties in the professional market. Technical exercises like this round robin analysis are part of how those standards are enforced over time, rather than simply established once and left unchecked.
Consistent assay standards across refining hubs are a quiet but essential foundation of market trust — and these periodic reviews help keep that foundation solid.
