Proof of Trust and Reliability
Good Delivery Referee
TANAKA is working to create a global standard for precious metals.
TANAKA is the only accredited Good Delivery Referee in Japan that assesses accredited precious metal refiners to ensure the quality of globally-marketed precious metals.
TANAKA appointed Good Delivery Referee, demonstrating the world-class standard of its technologies
TANAKA’s appointment as a Good Deliver Referee proves that:
- TANAKA possesses the world-class technologies required to assess producers around the world;
- TANAKA takes the responsibility of ensuring the quality of gold and silver throughout the world; and
- TANAKA can be relied upon, particularly given that it is one of only five Good Deliver Referees in the world and the only one in Japan.
Production of analytical gold reference samples for solid emission spectrometry
TANAKA assumes a main role in the market as an LPPM-approved Good Delivery Referee.
TANAKA has also been accredited Good Delivery Bars for Commodity Exchange Inc. (COMEX) and the New York Mercantile Exchange (NYMEX).
Our Analytical Techniques Support Customer Confidence in TANAKA
We meet customer expectations through the various instruments, techniques, and high-level skills we employ.
As a company dealing with precious metals, we believe that assay values form the foundation of the confidence that our customers and society as a whole have in us. Given this, we continue to strive to improve analytical accuracy and develop new technologies.
Classification of Analysis based on Purpose and Analytical Methods
Towards International Standards
Accredited to ISO/IEC17025
ISO/IEC 17025 is the international standard that defines the general requirements for competence in examination or calibration. Our Planning and Development Office, TKG (TANAKA Precious Metals) Laboratory Center, acquired the ISO/IEC17025 accreditation for gold, platinum, palladium and silver analysis technology.
The accreditation encompasses the simultaneous analysis of metals in gold bullion (36 elements), platinum (40 elements), palladium (40 elements), and silver (37 elements) using an ICP-OES based on JIS H 6310, JIS H 6312, JIS H 6313, ISO 15096, and JIS K 0116 standards.