METHODS FOR SAMPLING AND
INORGANIC ANALYSIS OF COAL
U.S. Geological Survey
Bulletin 1823
Edited by D.W. Golightly and F.O. Simon
Table 27. Total sulfur in coal
| Sulfur Concentration (percent) | |||||
| Standard | Accepteda | Measuredb | nb | ||
| 771 | 0.59 | 0.60 | ± | 0.003 | (10) |
| 772 | 0.88 | 0.87 | ± | 0.01 | (9) |
| 774 | 0.63 | 0.65 | ± | 0.03 | (9) |
| 775 | 0.89 | 0.98 | ± | 0.01 | (10) |
| 780 | 2.06 | 2.17 | ± | 0.03 | (11) |
| 782 | 3.18 | 3.33 | ± | 0.05 | (10) |
| NBS 1632a | 1.58 | 1.59 | ± | 0.03 | (11) |
| NBS 1635 | 0.33 | 0.32 | ± | 0.02 | (10) |
| NBS 2683 | 1.85 | 1.96 | ± | 0.04 | (10) |
| aSources:
Accepted sulfur concentrations for standards 771, 772,
774, 775, 780, and 782 are from Alpha Resources, Inc.
(1985). Accepted sulfur concentrations for NBS standards
1632a, 1635, and 2683 are from NBS (1984). b Sulfur concentrations measured in U.S. Geological Survey laboratories. Values shown for each coal standard are the arithmetic mean and standard deviation for n measurements, where n is the number in parentheses |
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