The Chemical Analysis of Argonne Premium Coal Samples

Edited by Curtis A. Palmer

1997
U.S. Geological Survey Bulletin 2144

Compilation of Multitechnique Determinations of 51 Elements in 8 Argonne Premium Coal Samples

By Curtis A. Palmer and Sarah A. Klizas

Figure 3. The comparison of mean concentration (in parts per million, ppm) in eight Argonne Premium Coal samples of barium determined by all high-precision techniques excluding outliers with the average concentrations of barium determined by all techniques. All plotted data are determined on, or converted to, a whole-coal basis. The diagonal line is the line of perfect agreement. The high-precision techniques in the legend are in bold. All techniques are defined in appendix 1; letters in parentheses have the following meanings: C, determined on whole coal; A, determined on ash (but converted to a whole-coal basis for this figure); R, analysis performed on ash by the U.S. Geological Survey (USGS) Reston, Va.; D, analysis performed on ash by the USGS in Denver, Colo. Error bars given are the range in the y direction and the standard deviatino of the mean in the x direction.

[ Contents ]

Created by the EERT WWW Staff.