OREAS 63

OREAS 63 is a gold–silver certified reference material prepared from Cerro Moro ores, composited from Low Ag–Au ore, with minor additions of High Ag ore and High Au ore.

Designed for calibration and routine QA/QC of Au–Ag assay methods (fire assay/ICP-OES-MS) and multi-element geochemical suites, OREAS 63 provides a realistic matrix for epithermal lode-style materials.

OREAS 63 has been characterized using the following methods:

  • Gold via 25-50g fire assay with AAS or gravimetric finish
  • Silver via 25-50g fire assay with Gravimetric finish
  • Silver via 4-Acid digestion with AAS finish

Certified values for applicable analytes are operationally defined for each method, with results under OREAS ISO 17034 scope of accreditation.

Note: Analyte values are indicative only and may change when certified.

						

										

						
							

								Analyte
								
									
										Indicative Value									
								
								1SD
								Expanded Uncertainty Low
								Expanded Uncertainty High
								Method
							

						
						
															

									Ag, Silver (ppm)
									228
									TBD
									TBD
									TBD
									4-Acid Digestion
								

															

									Au, Gold (ppm)
									4.49
									TBD
									TBD
									TBD
									Pb Fire Assay
								

													
					

				


				


									
Downloads

											Certificate
					
											DataPack
					SDS NRAM (226 KB)				

					

													
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Specifications