 The presence of carbonaceous matter in limestones renders the exact or even approximate determination of ferrous iron often impossible. Nevertheless, even in its presence acceptable results are sometimes obtainable if there is not much of such matter...  Bulletin of the United States Geological Survey - Seite 222von Geological Survey (U.S.) - 1910Vollansicht - Über dieses Buch
 | 1907 - 874 Seiten
...solution added to the former. To the solution obtained in either of the above ways ammoniummolybdate solution is added and the precipitate treated by one...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
 | Henry Gannett - 1906 - 644 Seiten
...solution added to the former. To the solution obtained in either of the above ways ammoniummolybdate solution is added and the precipitate treated by one...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
 | William Francis Hillebrand - 1907 - 212 Seiten
...solution added to the former. To the solution obtained in either of the above ways ammoniunimolybdate solution is added and the precipitate treated by one...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
 | William Francis Hillebrand - 1910 - 252 Seiten
...filtrates from the calcium oxalate to dryness, expel the ammonium salts by ignition, add hydrochloric acid and reevaporate, take up again with as little acid...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
 | John Milton Nickles - 1919 - 586 Seiten
...phosphomolybdate. 40. FERROUS IRON. The presence of carbonaceous matter in limestones renders the exi or even approximate determination of ferrous iron...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
 | American Society for Testing Materials - 1924 - 776 Seiten
...SOLUBLE IN SULFURIC ACID. In limestones, the presence of carbonaceous matter renders the Perrou* iron. exact or even approximate determination of ferrous...if it does not give with acid a colored solution. Occasionally limestones 1 Sea Blair. "The Chemical Analysis of Iron," 8th Edition, p. 92. •See Journal.... | |
 | American Society for Testing Materials - 1928 - 976 Seiten
...FERROUS IRON SOLUBLE IN SULFURIC ACID. Ferrous iron. In limestones, the presence of carbonaceous matter renders the exact or even approximate determination...if it does not give with acid a colored solution. Occasionally limestones show films of manganese peroxide, which likewise interferes with the determination.... | |
 | John Quayle Cannon, Addams Stratton McAllister - 1930 - 706 Seiten
...DETERMINATION OF FERROUS IRON SOLUBLE IN SULPHURIC ACID In limestones the presence of carbonaceous matter renders the exact or even approximate determination...if it does not give with acid a colored solution. Occasionally limestones show films of manganese peroxide, which likewise interferes with the determination.... | |
 | 1930 - 722 Seiten
...DETERMINATION OF FERROUS IRON SOLUBLE IN SULPHURIC ACID In limestones the presence of carbonaceous matter renders the exact or even approximate determination...if there is not much of such matter and if it does noi give with acid a colored solution. Occasionally limestones show films of manganese peroxide, which... | |
 | 1919 - 304 Seiten
...dissolve the precipitate in dilute nitric acid, and precipitate the phosphorus as phosphomolybdate. 40. FERROUS IRON. • The presence of carbonaceous matter...existing chiefly if not wholly as carbonate, that is determinable. Occasionally limestones show films of manganese peroxide, which likewise interferes with... | |
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