Apparatus useful for analyzing refractory substances

In combination with a non-refractory sample elemental analyzer, including a furnace having an upper temperature limit capable of oxidizing only non-refractory materials having a sample delivery tube extending therethrough, an apparatus for oxidizing a refractory sample;

• said apparatus comprising:
• an open, hollow, cylindrical heat containment member having said refractory sample therein, said member being within said sample delivery tube positioned within said furnace of said analyzer;
• and
• a layer of powdered material overlying said refractory sample, said powdered material being exothermically reactive at a temperature less than said upper limit of said furnace, whereby when said powdered material exothermically reacts, the temperature limit available for oxidizing said refractory sample is extended such that said refractory sample is vaporized.