Recently, the International Medical Reference Laboratory Proficiency Testing Results (RELA2013) has been published. The projects of MAKER all meet the requirements. Since 2008, MAKER has participated RELA experiments six years in a row, and the projects have been all qualified.
In RELA2013, MAKER determined thyroxine and uric acid by Isotopes Dilution-Ultra Performance Liquid Chromatography–Tandem Mass Spectrometry Method (ID/UPLC/MS/MS and decisive method). Isotope Dilution Mass Spectrometry is one of the decisive methods, and is usually used to assign value for reference material. The measuring accuracy and uncertainty are conformed to the requirements of the reference method, indicating that traceability of MAKER gets further improvement. MAKER has reached the highest level of traceability around the world.