Abstract
Abstract A spectrographic method has been developed, using a sustaining a.c. arc, for the quantitative determination of beryllium in amounts as low as 0.001 microgram. The method is based upon the excitation of beryllium volatilized from a chloride matrix which is prepared from a lithium chloride-graphite buffer, liver ash, and the ashed or fused sample. Experiments with Be7 have provided quantitative recoveries of the radioactive tracer from urine samples and from bertrandite and beryl ores. Application of the method to samples of beryllium ores provided, in six out of eight cases, less than 10% deviations from the results of the chemical analyses reported by the U. S. Bureau of Mines.
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