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
In December 2003, TANAKA was accredited as Good Delivery Referee for gold and silver by London Bullion Market Association (LBMA), the most prestigious trade organization of the global gold and silver market. There are only five LBMA Good Delivery Referees in the world at present, and TANAKA is the only one in Japan.
TANAKA assumes a main role in the market as an LPPM-approved Good Delivery Referee.
In April 2009, TANAKA was appointed as a Good Delivery Referee for London Platinum & Palladium Market (LPPM). Since then, TANAKA has been striving to polish our analytical and assessing skills. There are only six LPPM Good Delivery Referees in the world at present, and TANAKA is the only one in Japan.
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
Classification based on Purpose
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, 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.