The determination of lead in 13 USGS standard rocks |
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Authors: | Aruscavage P J Campbell E Y |
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Institution: | United States Department of the Interior, Geological Survey, Reston, Virginia 22092, U.S.A. |
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Abstract: | Lead was determined in 13 U.S. Geological Survey standard rocks by graphite furnace atomization and atomic-absorption spectrometry after extraction of lead with diethylammonium diethyldithiocarbamic acid. An analysis of variance of the results obtained from a random sampling of three different bottles of each standard rock showed no heterogeneity among bottles, at the F(0.95) level, for a 100-mg sample-size. The relative error of the method, based on the standard deviation of the mean within bottles, was generally less than 10%. |
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