OREAS 172 is a supergene manganese ore matrix-matched certified reference material (MMCRM) prepared and certified by Ore Research & Exploration Pty Ltd. The material was sourced from the Groote Eylandt Mining Company Pty Ltd (GEMCO) Mn deposit which is hosted within a shallow dipping Lower Cretaceous sedimentary rock unit. Groote Eylandt is in the Gulf of Carpentaria off the coast of Australia’s Northern Territory. A small portion (4.6%) of barren siltstone sourced from a quarry north of Melbourne, Australia was added to lower the grade. OREAS 172 is one of a suite of four Mn ore MMCRMs certified by borate fusion XRF covering a Mn grade range of 35-46%.
|Analyte||Certified Value||1SD||95% Confidence Limits Low||95% Confidence Limits High||Method|
|Mn, Manganese (wt.%)||42.75||0.214||42.64||42.87||Borate Fusion XRF|
|SiO2, Silicon dioxide (wt.%)||14.09||0.085||14.05||14.14||Borate Fusion XRF|
|Fe, Iron (wt.%)||3.83||0.040||3.80||3.85||Borate Fusion XRF|
|Al2O3, Aluminium(III) oxide (wt.%)||5.80||0.058||5.76||5.83||Borate Fusion XRF|
|BaO, Barium oxide (wt.%)||0.285||0.012||0.279||0.292||Borate Fusion XRF|
|CaO, Calcium oxide (wt.%)||0.095||0.007||0.092||0.099||Borate Fusion XRF|
|K2O, Potassium oxide (wt.%)||1.89||0.032||1.87||1.91||Borate Fusion XRF|
|MgO, Magnesium oxide (wt.%)||0.141||0.014||0.133||0.149||Borate Fusion XRF|
|Na2O, Sodium oxide (wt.%)||0.273||0.016||0.264||0.281||Borate Fusion XRF|
|P, Phosphorus (ppm)||752||17||743||761||Borate Fusion XRF|
|TiO2, Titanium dioxide (wt.%)||0.236||0.009||0.233||0.240||Borate Fusion XRF|
|V2O5, Vanadium(V) oxide (ppm)||501||45||467||536||Borate Fusion XRF|
|LOI1000, Loss On Ignition @1000°C (wt.%)||12.04||0.156||11.95||12.13||Thermogravimetry|
Each quarter, we will keep you up to date with news on the latest OREAS CRMs and QA/QC best practices in the analytical industry.