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METHODS FOR SAMPLING AND INORGANIC ANALYSIS OF COAL
U.S. Geological Survey Bulletin 1823

Edited by D.W. Golightly and F.O. Simon


Table 12. Concentration ranges provided by rock standards for the XRF analysis of coal ash

  Concentration (percent)
Oxide Lowest standard Highest standard
Na2O 0.06 8.37
MgO 0.10 43.50
Al2O3 0.73 54.53
SiO2 4.43 87.21
P2O5 0.01 34.50
K2O 0.03 10.03
CaO 0.08 50.50
TiO2 0.01 2.69
MnO 0.01 0.77
Fe2O3 1.00 25.76
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