TN-001 Chrysos PhotonAssay™ Measurement Performance for Gold on Certified Reference Materials
How PhotonAssay™ performs when tested against known gold CRMs.
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What this note covers
Detection limit testing on blank samples: 2-sigma LDL of 0.010 ppm on reagent blanks, 0.015–0.03 ppm on typical gold ores
Instrument precision vs. gold grade: 14% at 0.1 ppm, 8% at 0.3 ppm, 4.5% at 1 ppm, below 2.5% above 3.5 ppm
Direct comparison of PhotonAssay™ and certified fire assay grades across five CRM studies — over 200 materials from OREAS, Rocklabs, CDN, Geostats, Gannet Holdings, AMIS and RRM
High-grade carbon sample performance (PAAU02H and PAAU02U services) and low-grade CRM performance down to 19 ppb
Recommended PhotonAssay™ mean grades and 1-SD precisions for 29 CRMs, suitable for laboratory QC control chart setup
