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A Method For the Determination of Trace Impurities
Volume 12, Number 2 (May 1958) Page 54-57
Traces of impurity may be determined by solution of the sample followed by complete coprecipitation with a carrier under conditions such that the original matrix is not precipitated. The impurity is then determined by d c. arc spectroscopy, using the carrier as internal standard. The method is of use for the determination of traces too low for normal methods, and for the analysis of trace standards for conventional metallic sample methods where no purely chemical method exists.