 In many cases in order to obtain all the cnlorine it is sufficient to attack the powder by chlorine-free hydrofluoric and nitric acids in the cold, with occasional stirring, and after filtering through paper fitted into a rubber funnel or large platinum...  Bulletin of the United States Geological Survey - Seite 184von Geological Survey (U.S.) - 1910Vollansicht - Über dieses Buch
 | 1898 - 356 Seiten
...hydrofluoric acid and a little nitric acid, with occasional stirring, and, after filtering through a large platinum cone, to throw down the chlorine by...nitrate. The presence of nitric acid is necessary, since otherwise ferrous fluoride reduces silver nitrate with deposition of crystallised silver. When coagulated... | |
 | 1901 - 392 Seiten
...occasional stirring, and after filtering through paper fitted into a large platinum cone or rubber funnel, to throw down the chlorine by silver nitrate. The presence of nitric acid is necessary, since otherwise ferrous fluoride reduces silver nitrate with deposition of crystallised silver. When coagulated... | |
 | Frank Wigglesworth Clarke, William Francis Hillebrand - 1897 - 342 Seiten
...hydrofluoric acid and a little nitric acid, with occasional stirring, and after filtering through a large platinum cone, to throw down the chlorine by...nitrate. The presence of nitric acid is necessary, since otherwise ferrous fluoride reduces silver nitrate with deposition of crystallized silver. When coagulated... | |
 | Marcus Baker - 1900 - 350 Seiten
...occasional stirring, and after filtering through paper fitted into a large platinum cone or rubber funnel, to throw down the chlorine by silver nitrate. The presence of nitric acid is necessary, since otherwise ferrous fluoride reduces silver nitrate with deposition of crystallized silver. When coagulated... | |
 | 1907 - 874 Seiten
...HYDROFLUORIC ACIDS. In many cases in order to obtain all the cnlorine it is sufficient to attack the powder by chlorine-free hydrofluoric and nitric acids in...nitric acid is necessary, since in its absence ferrous fluoride reduces silver nitrate with deposition of crystallized silver. It may be advisable to redissolve... | |
 | Henry Gannett - 1906 - 644 Seiten
...HYDROFLUORIC ACIDS. In many cases in order to obtain all the cnlorine it is sufficient to attack the powder by chlorine-free hydrofluoric and nitric acids in...nitric acid is necessary, since in its absence ferrous fluoride reduces silver nitrate with deposition of crystallized silver. It may be advisable to redissolve... | |
 | William Francis Hillebrand - 1907 - 212 Seiten
...HYDROFLUORIC ACIDS. In many cases in order to obtain all the chlorine it is sufficient to attack the powder by chlorine-free hydrofluoric and nitric acids in...or large platinum cone to throw down the chlorine bv silver nitrate. The presence of nitric acid is necessary, since in its absence ferrous fluoride... | |
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