Abstract
Low-temperature ashing of organic samples has been carried out within a glow discharge of carbon dioxide in place of the usually used oxygen. Experiments using the carbon dioxide plasma for ashing cellulose powder impregnated with known amounts of sodium halides produced high recovery of halides in the ash residues, while low recovery of halides and byproducts of oxyhalides was obtained using oxygen plasma. Installation of a metal mesh to separate the sample boat from the discharge region (electrostatic shielding) raised the recovery to almost quantitative levels. Similar results were obtained by applying this method to samples containing sodium arsenate, chromium chromate, and ferric sulfate.
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