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.

Types of available CRMs for Electrolysis:

Green Petroleum Coke Anthracite Fluorspar Final Conc. Scrubber Alumina

Calcined Petroleum Coke Pitch Elemental Comp. Electrolytic Bath Cryolite

Metallurgical Coke Raw Fluorspar Aluminum Fluoride Pitch Physical Prop.

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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