Assaying

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The assaying testing laboratory

Valcambi operates a state-of-the-art testing laboratory. Our testing methods are accredited since 1995 according to ISO/IEC 17025 standards. All sampling and testing activities are performed by independent certified precious metals assayers in compliance with the Swiss Precious Metals Control Law and supervised by the Central Office for Precious Metals Control.

A highly qualified professional team carries out a whole range of analyses to ensure Valcambi always meets both production and environmental standards of excellence.

Our laboratory employs a comprehensive range of testing techniques as e.g. traditional Fire Assay, potentiometric methods, XRF, SPARK and ICP spectrometry. Testing methods are applied on a case-by-case basis and may include various testing techniques, applied singly or in combination, as appropriate. We maintain close and effective communication with our Clients and their Representatives and cooperate closely with the Swiss public authorities.

Processes

Homogenization & sampling - Each shipment of Non Good Delivery (NGD) precious metals is first weighted and melted to ensure homogeneity. Sampling is then undertaken, the method chosen depending on the quantity and kind of material received.

Analysis - The laboratory analyses for gold, silver, platinum group metals and over 40 other elements and compounds. For each NGD material our laboratory issues and provides the Client with an official Assay Report. For shipments of Good Delivery (GD)  bars we undertake various tests to ensure there has been no tampering.