Analytics

Dedicated Service to Precious Metals

At C.HAFNER&HILDERBRAND analytics stand for the highest professional expertise and solution – focussed individual advice and support. C.HAFNER certifications according to DIN EN ISO 9001 and DIN EN ISO 13485 for medical devices along with laboratory accreditation according to ISO 17025 guarantee the highest reliability for chemical, physical and testing analysis for the following purposes:

Determining the fineness of carat & hallmarking alloys
Determining the composition of carat, hallmarking & dental alloys
Determining impurities in fine metals
Metallographic and material studies
Determining the composition of waste and dross containing precious metals

Analysis Techniques

State-of-the-art analytics with different spectroscopic types and methods:

Atomic emission spectrometry (ICP-OES)
Atomic absorption spectrometry (AAS)
X-ray fluorescence analysis (RFA)
Powerful metallography and standard methods for determining physical material properties (tensile test, Vickers hardness measurement, thermal analysis, dilatometry)
Scanning electron microscopy and EDX analysis for professional materials development and failure analysis.
Dynamic image analysis (DIA) to characterize particle size and particle shape of precious metal powders.

ACCREDITED TECHNIQUES

– ISO 11426 Jewellery – Determination of gold in gold jewellery alloys – Cupellation method (fire assay)
– ISO 11427 Jewellery – Determination of silver in silver jewellery alloys – Volumetric (potentiometric) method using potassium bromide
– ISO 11494 Jewellery – Determination of platinum in platinum jewellery alloys – ICP-OES method using yttrium as internal standard element
– ISO 11495 Jewellery – Determination of palladium in palladium jewellery alloys – ICP-OES method using yttrium as internal standard element

EXAMINATIONS OF FINE METALS

– ASTM B562-95: Standard Specification for Refined Gold
– ASTM B413-97: Standard Specification for Refined Silver
– ASTM B561-94: Standard Specification for Refined Platinum
– ASTM B589-94: Standard Specification for Refined Palladium

JEWELRY & DENTAL CORROSION TESTING

– DIN EN 1811: Reference test method for release of nickel from all rod assemblies which are inserted into pierced parts of the human body and articles intended to come into direct and prolonged contact with the skin;
– DIN EN ISO 10271 Dentistry – Corrosion test methods for metallic materials
ISO 11495 Jewellery – Determination of palladium in palladium jewellery alloys – ICP-OES method using yttrium as internal standard element

TESTS ON DENTAL ALLOYS ACCORDING TO

– DIN EN ISO 22674 Dentistry – Metallic materials for fixed and removable restorations and appliance

FURTHER TESTING BASED ON THE FOLLOWING STANDARDS

– DIN 51007 Thermal analysis – Differential thermal analysis (DTA)
– DIN 51045 Determination of linear thermal expansion of solids (coefficient of thermal expansion)
– DIN 6507 Metallic materials – Vickers hardness test
– DIN EN ISO 6892 Metallic materials – Tensile testing

ADDITIONAL TESTING

Spectrometry
– Atomic emission spectrometry (ICP-OES)
– Atomic absorption spectrometry (AAS)
– X-ray fluorescence analysis (RFA)
Metallography
SEM & EDX
Dynamic image analysis (DIA) to characterize PSD of precious metal powders.

For more information, please contact