 | 1898 - 356 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in absence oi iron. Should there be fear of a trace of silica being present,...sulphuric acids before weighing the barium sulphate. This, of course, gives the toial sulphur in the rock. If soluble sulphates and sulphides as well as... | |
 | 1896 - 1020 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in absence of iron. Should there be fear of a trace of silica being present,...sulphuric acids before weighing the barium sulphate. This, of course, gives the total sulphur in the rock. If soluble sulphates aud sulphides as well as... | |
 | Frank Wigglesworth Clarke, William Francis Hillebrand - 1897 - 342 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in absence of iron. Should there be fear of a trace of silica being present,...sulphuric acids before weighing the barium sulphate. This, of course, gives the total sulphur in the rock. If soluble sulphates and sulphides as well as... | |
 | Marcus Baker - 1900 - 350 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in absence of iron. Should there be fear of a trace of silica being present,...sulphuric acids before weighing the barium sulphate. This, of course, gives the total sulphur in the rock. If soluble sulphates and sulphides as well as... | |
 | 1907 - 874 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in the absence of iron. Should there be fear of a trace of silica being present,...hydrofluoric and sulphuric acids before weighing the barium sulphate.6 b. FRACTIONAL DETERMINATIONS. If traces of water-soluble sulphates are present, they can... | |
 | Henry Gannett - 1906 - 644 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in the absence of iron. Should there be fear of a trace of silica being present,...hydrofluoric and sulphuric acids before weighing the barium sulphate.6 b. FRACTIONAL DETERMINATIONS. If traces of water-soluble sulphates are present, they can... | |
 | William Francis Hillebrand - 1907 - 212 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in the absence of iron. Should there be fear of a trace of silica being present,...hydrofluoric and sulphuric acids before weighing the barium sulphate.6 b. FRACTIONAL DETERMINATIONS. If traces of water-soluble sulphates are present, they can... | |
 | Geological Survey (U.S.) - 1907 - 220 Seiten
...sulphate obtained is hardly ever needful, especially as it has been precipitated in the absence of iron. Should there be fear of a trace of silica being present,...hydrofluoric and sulphuric acids before weighing the barium sulphate.6 b. FRACTIONAL DETERMINATIONS. If traces of water-soluble sulphates are present, they can... | |
 | Samuel Stinson Gannett, David Henry Baldwin - 1910 - 490 Seiten
...silica with the barium sulphate.0 It is well that this is so, for evaporation on a bath heated b}r gas to remove silica would in many cases involve an...traces of water-soluble sulphates are present , they ran he removed when desired by boiling water. o The results of CW Stoddart (Jour. Am. Chem. Soc., vol.... | |
 | John Milton Nickles - 1919 - 586 Seiten
...present, by contamination from I he sulphur of the gas burned. With a steam bath this difficulty does mil present itself. Should there be fear of a trace of...sulphuric acids before weighing the barium sulphate. In order to reduce greatly the error caused by the presence of sodium chloride resulting from the sodium... | |
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... absence of iron. Should there be fear of a trace of silica being present, it can be removed by a drop of hydrofluoric and sulphuric acids before weighing the barium sulphate.6 b. 