A-Review-of-the-LPPM-IPMI-Platinum-Sponge-Analysis-Round-Robin-AR25.pdf

1、PGM Sponge Accreditation Platinum and Palladium introduced March 2021 Rhodium introduced January 2023 The most commonly used form of PGMs LPPM Members requested an accreditation system To secure and improve technical and responsible sourcing standardsPGM Sponge Accreditation Accreditation applicatio

2、n process is very similar to the Good Delivery(GD)application process Proactive Monitoring(PAM)process is also very similar and is integrated with the current GD programme Additional tests for oxygen content and sponge homogeneity Sponge Accredited refiner lists published by the LPPMInterlaboratory

3、Round RobinHigh Grade Platinum Sponge 99.95%Samples produced and certified by Johnson Matthey UK Results collated and distributed confidentially by the IPMI LPPM Good Delivery RefinersIPMI Sampling&Analytical Committee30 laboratories reported results22 were Good Delivery Refiner accredited laborator

4、iesInterlaboratory Round RobinReporting InstructionsAssay for fineness,impuritiesLoss on Reduction/Ignition or oxygen contentReport methodology and rate experience(1 to 5)Results useful for ISO 17025 accreditationInterlaboratory Round RobinInterlaboratory Round RobinAnalyteMeanMedianCERT Value#of La

5、bs ReportingPt%99.98599.98799.98030Major ImpuritiesNa(ppm)66737420Os25264519Ni23211929K19203120Pd991227Fe74323Cr53323Au43320Mo3321599.97299.97599.97699.97799.97899.98099.98099.98199.98299.98299.98399.98499.98599.98699.98699.98699.98799.98799.98799.98799.98799.98899.98899.98999.99099.990 99.99099.993

6、99.99499.99599.99999.985399.964599.969599.974599.979599.984599.989599.994599.9995WTCJK7CERTV5QNIGFMZ14ALX3RO2PSYDHBIPMI-LPPM Platinum Round RobinPlatinum Purity%Mean=99.985%Median=99.987%ParticipantGroupAverage95%Confidence Interval1 x Sigma2 x SigmaAverage w.95%Confidence Interval,Replicates0.25.05