These CRMs are certified by primary calibrations and are NIST traceable. An inter-laboratory comparison is finally initiated to achieve uniform consensus values and then all data is statistically analyzed to ensure that the certified values and confidence intervals are of the highest accuracy.
Bauxite Red Mud Alumina Alumina Physical Prop. Alumina Particle Size
These typical raw materials and process intermediates have been characterized under the supervision of the Arvida Research and Development Center to ISO guide 25. A Certificate of Analysis, with Confidence Intervals, is issued with each CRM.
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