Rationale

Testing the carbon in its supplied form ensures results reflect actual application performance. Eliminating this step improves reproducibility and aligns with industry practice by evaluating the material as delivered and used. Restricting iron measurement to Atomic Absorption Spectroscopy (AAS) is unnecessarily limiting. Modern instruments like ICP-OES, ICP-MS, and other validated technologies offer equivalent or superior accuracy in the specified range (0.0030%–0.050%).