Assaying

We think every customer deserve absolute confidence in their precious metals valuation, that is why you receive not only the fairest possible return based on undeniable data, but also a detailed report for full transparency.

All batches are tasted using ICP-OES – high-accuracy method that confirms high purity 99.99% of precious metals. The ICP-OES (Inductively Coupled Plasma – Optical Emission Spectroscopy) is an elemental analysis technique based on the measurement of light, emitted by atoms or ions excited in a high-energy plasma of testing substences.

This standard is used for the preparation of samples for the quantitative analysis of silver content in precious metal alloys containing between 90.00% and 99.99% silver, using the ICP-OES technique.

Potentiometric auto titration is the standard used for the preparation of samples for the quantitative analysis of silver content in precious metal alloys containing between 10% and 99% silver.

The laboratory implements quality control by performing duplicate analyses for each sample, as well as analyzing QC samples. The evaluation criterion is the percentage relative percent difference (%RPD), which must be less than 1%, according to ISO 11427: Jewellery – Determination of Silver in Silver Jewellery Alloys – Volumetric (Potentiometric) Method Using Potassium Bromide.