Gold bars & doré

Material photograph used for illustration.

Begin with the purpose of the test

Are you screening an item, checking an expected composition or seeking a result to support a commercial settlement? State the purpose clearly so the laboratory can propose an appropriate approach.

Surface results and bulk material

XRF can provide elemental information at a tested surface. Ask whether the surface represents the interior and whether complementary checks or a representative metallic sample are needed.

Before sampling

• Agree whether cutting, drilling or melting is permitted.
• Confirm how the sample will represent the bar or lot.
• Identify any retained samples and witness arrangements.
• Clarify the report units, method and acceptance requirements.

Explore XRF screening and fire assay before discussing the specific plan with the laboratory.