Eliminates Sample Digestions While techniques such as AA or ICP work well for liquid samples, some matrices can be nearly impossible to get into solution. This is the case for certain ceramics as well as for materials like graphite. For other samples, such as high purity copper and certain precious metals, the digestion needed to get the solid into solution, can dilute the sample beyond the detection limits obtainable with these techniques. Digestion steps also carry with them the possibility of contamination of the acids and vessels used for the digestion process. The Prodigy DC Arc can analyze directly, powders, wires and chips in their native form without the need to digest or dilute the sample.