| Abstract: | The preliminary hearth heating method (A and E) gave results within the A. S. T. M. tolerances for all duplicates obtained in the same laboratory. Checks between different laboratories within A. S. T. M. tolerances were obtained for coals containing up to about 3.6 per cent mineral carbon dioxide, but these ashes contained larger amounts of retained sulfur. The determination of ash by the cold furnace method (B and F) gave duplicate results within A. S. T. M. tolerances for all samples in the U. S. Bureau of Mines laboratory and for samples up to about 1.6 per cent mineral carbon dioxide content in the Illinois Geological Survey laboratory. Checks between average values from the two laboratories were within A. S. T. M. tolerances for all samples. |
| Genre: | Article |
| ProdID: | 70010996 |
| Citation Author: | Rees, O. W.; Selvig, W. A. |
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| Citation End Page: | 212 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Industrial and Engineering Chemistry |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Determination of ash in coals unusually high in calcite and pyrite; 1942; Article; Journal; Industrial and Engineering Chemistry; Rees, O. W.; Selvig, W. A. |
| Citation Start Page: | 209 |
| Citation Volume: | 14 |
| Citation Year: | 1942 |
| Type: | citation/reference |
| Text: | Determination of ash in coals unusually high in calcite and pyrite; 1942; Article; Journal; Industrial and Engineering Chemistry; Rees, O. W.; Selvig, W. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1942 00:00 -0600 |
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