Gold Assay Lab Singapore

A gold assay lab in Singapore tests the gold content of a sample, usually by fire assay or another accredited method, and issues a certificate of results. Choosing a lab with recognised accreditation and clear reporting is important when the result affects a sale or valuation.

How assay testing works

Fire assay is the traditional method. The sample is fused with fluxes, the precious metals are collected in a lead bead, and the bead is cupelled and weighed. Other methods, such as X-ray fluorescence, are used for screening, and results are usually confirmed by fire assay when accuracy matters.

What a certificate should show

• The laboratory name, accreditation and the date of testing.
• The method used and the measured purity.
• The uncertainty of the measurement.
• A unique reference that links the certificate to the sample.

Choosing a lab

Compare turnaround, fees and whether the lab can test the metals you need. Ask whether the lab is accredited for the method you require, and whether it will accept samples from third parties. An independent lab can be useful when buyer and seller disagree.

Sample handling

Representative sampling matters as much as the test itself. A poorly taken sample can give a misleading result, so agree how the sample will be taken, sealed and transported before testing.

Fire Assay Versus Screening Methods

Fire assay is widely regarded as the reference method for precious metal content, while screening methods are faster and suited to sorting or first-pass checks. Where a result will drive a price, a fire assay or an equivalent confirmatory method is usually the sensible choice.

Disputes and Third-Party Testing

When buyer and seller disagree on a result, an independent lab can re-test a retained sample. Agree in advance how retained samples are stored and who pays for a second test, so that a dispute can be resolved without starting from scratch.

Retaining Samples

A retained sample allows a second test if the first result is disputed. Seal and label it at the time of sampling, store it under controlled conditions, and record who has access. Agree in writing how long the sample will be kept and what happens to it at the end of that period.

Retained samples are most useful when the value of the transaction is large or the buyer and seller have not worked together before.

Next steps