Role-of-the-Referees-and-History-of-Their-Development-AR25.pdf

1、THE ROLE OF THE REFEREESDaniela Manara,Laboratory Manager,Trace Analysis&Metallurgy Metalor Technologies,Switzerland Hannah Coakley,Physical&Technical Services Officer LBMA2TRIBUTE TO STEWART MURRAY Johnson MattheyEngelhard-ClalTHE BEGINNINGSTHE BEGINNINGS19871987-2001 2001 REFEREES TESTING 4Gold Go

2、ld 1,500 samples up to 16 different alloys1,400 fire assays240 ICP-OES analyses 2nd stage several hundred analyses of other Referees samplesSilver Silver 200 samples 8 different alloys 1,400 ICP and spark analysisA NEW ERA:2001-2003SUMMARY OF THE REFEREES WORKApplications for Good Delivery Accredita

3、tionApplications for Good Delivery AccreditationReference Samples Reference Samples Quality Quality Monitoring Monitoring gate gate keeper role keeper role Proactive Monitoring Proactive Monitoring 6Proficiency Testing Proficiency Testing Certified Reference Materials Certified Reference Materials G

4、DL APPLICATION PROCESS BAR TESTING 11%Anonymous test with two Referees Weighing,visual inspection and assay of cut samples Melt and dip sampling followed by full elemental analysis 8PROACTIVE MONITORING Mandatory for all LBMA GDL Refiners Demonstrate casting and assaying capabilitiesCompetence revie

5、wed on a three-year basis PROFICIENCY TESTING SCHEME Anonymous,voluntary scheme open to all refiners and laboratories It is not necessary to have the GD accreditation Important external quality control The performance of the GDL labs has improved 200220092014201920202024Au&Ag samples first produced

6、between 2002 and 2003 for GDL applicationsCRMs AgRM4/5Referees begin work on new gold CRMsCRMs AuRM3 Certified reference materials(CRMs)(Au/Ag RM 1&2)2025CRMs AuRM4/5 SAMPLES AND CERTIFIED REFERENCE SAMPLES AND CERTIFIED REFERENCE MATERIALS MATERIALS Referees