Arconic Trace Metal CRMs supplement our regular alloy CRMs. A unique method for trace metal additions allows alloys to be produced with highly controlled trace metal concentrations. Trace metal concentrations have been picked to provide both low end calibration points (<0.0001%) and points that are typical for trace metal content that can be measured with good precision and accuracy by today’s instrumentation. Actual concentrations may vary from those shown in the our catalog, but will always be certified using a combination of analytical techniques including Spark-AES, ICP-AES, GD-MS, ICP-MS and other appropriate techniques.