What is the difference between total and soluble cadmium?
Total cadmium – this provides the total amount of cadmium in a sample. Soluble cadmium – this provides the amount of cadmium that can be extracted out of a sample typically using a dilute hydrochloric acid solution similar to stomach acid. ASTM F963, CHPA and EN-71 part 3 define methods for determining the soluble cadmium. Depending on the type of material, the soluble cadmium can be much lower than the total amount of cadmium actually present.
