A stream of oxygen excited by a radio frequency discharge can be used to decompose organic substances prior to trace element analysis. Biological tissue, graphite, filter paper, and ion exchange resin have been oxidized by this method. Rates of 1 gram per hour can be achieved with a 300-watt, 1 3.56-Mc. oscillator. Temperatures of less than 100°C. can be maintained.Radioactive tracer studies demonstrate that 17 representative elements can be
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