Table 1.
NIST coal standard reference material information.
| Standard reference material numbera | |||||
|---|---|---|---|---|---|
|
| |||||
| 1635 | 2682b | 2692b | 2684b | 2685b | |
| Origin | Erie, CO | Gillette, WY | Holden, WV | Marion, IL | Captina, WV |
| Coal type | Subbituminous | Subbituminous | Bituminous | Bituminous | Bituminous |
| Surface area (m2 g−1)b | 1.79 | 4.94 | 1.35 | 2.11 | 1.72 |
| Pyritic sulfur (mass fraction)c | 0.00 | 0.01 | 0.49 | 0.52 | 1.15 |
| Iron release (μM)d | 0.00 | 0.02 | 0.48 | 8.31 | 13.3 |
| Elemental analysise | Mass fraction (wt.%) | ||||
|
|
|||||
| Iron | 0.239 ± 0.005 | 0.24 | – | 1.5 | 3.9 |
| Sulfur | 0.3616 ± 0.0017 | 0.4917 ± 0.0079 | 1.170 | 3.076 ± 0.031 | 4.730 ± 0.068 |
| Mass fraction (μg g−1) | |||||
|
|
|||||
| Arsenic | 0.42 ± 0.15 | 1.0 | – | 3.9 | 12 |
| Chromium | 2.5 ± 0.3 | 15 | – | 17 | 22 |
| Manganese | 21.4 ± 1.5 | 26 | – | 36 | 41 |
| Mercury | 0.0109 ± 0.0010 | 0.1088 ± 0.0029 | 0.1333 ± 0.0041 | 97.4 ± 4.7 | 146.2 ± 10.6 |
| Zinc | 4.7 ± 0.5 | 8.6 | – | 110 | 17 |
a
National Institute of Standards and Technology standard reference material numbers.
b
BET surface area values are for coals as received and used in experiments, not desiccated.
c
Dry basis.
d
0.125 m2 L−1 coal loadings, total iron [i.e. Fe(II) and Fe(III)] after 7 h in 1.5 mg L−1 RNA solution (Cohn et al., 2006a).
e
National Institute of Standards and Technology – Certified Analysis (NIST, 2007b,c,a, 2008, 2010).