METHODS FOR SAMPLING AND
INORGANIC ANALYSIS OF COAL
U.S. Geological Survey
Bulletin 1823
Edited by D.W. Golightly and F.O. Simon
Table 25. Concentrations of mercury determined by cold-vapor atomic absorption spectrometry for selected coal and fly-ash standards
| Hg Concentration (m g/g) | |||||||
| Sample | Material | Measureda | Acceptedb | ||||
| NBS 1632 | Bituminous Coal | 0.11 | ± | 0.01 (15) | 0.12 | ± | 0.02 |
| USGS 24D | Subbituminous Coal | 0.40 | ± | 0.02 (20) | - | ||
| NBS 1633 | Coal Fly Ash | 0.12 | ± | 0.01 (15) | 0.14 | ± | 0.01 |
| NBS 1633a | Coal Fly Ash | 0.15 | ± | 0.01 (15) | 0.16 | ± | 0.01 |
| aUncertainty in
concentration is the standard deviation for the number of
measurements indicated in parentheses. bConcentrations of mercury in NBS 1632, 1633, and 1633a standard reference materials are certified values. |
|||||||
[ Contents | Coal Quality CD ]
Created by the EERT WWW Staff.
[an error occurred while processing this directive]
