At Prestige,we provide an assay service which allows our customers to assay the purity of gold or silver. Your assay is performed by Hong Kong Precious Assay Center(HKPMAC), a subsidiary of CGSE. which can be eligible to assay bullion bars of a purity of 99.99%.
Hong Kong Productivity Council
Fully accredited by HKPC (Hong Kong Productivity Council) to the ISO/IEC 17025:2005 standard, the Laboratory is recognized as centre of excellence for its expertise in specialist analytical procedures for precious metals. Samples are tested using a wide variety of methods depending upon the type and size of the sample, the specific elements to be tested and the accuracy required. A variety of instrumental and traditional techniques are used.
Typical methods of gold analysis
Fire Assay Collection
Traditional Fire Assay cupellation (following the principles of ISO 11426) and a gravimetric or spectrometric finish depending upon the concentration of gold in the sample/solution
Fire Assay-ICP-OES technique for low to medium grade powder/ore samples
A fusion collection,followed by cupellation, dissolution of the precious metal bead in an appropriate acid matrix and final determination by ICP-OES
3-5 working days