 He found, that, — in the production of Scheele's green, by arsenic, sulphate of copper and carbonate of potash, — chromate of potash might be substituted for the arsenic; and that it produced a precipitate not to be distinguished, by the eye, from...  The Technical repository, by T. Gill - Strona 364pod redakcją - 1822Pełny widok - Informacje o książce
 | Sir David Brewster, Robert Jameson - 1822 - Liczba stron: 458
...more than this last was resembled by that of the weaker. But what was still more important, Dr Pester found, that in the production of Scheele's green by...not be distinguished by their colour and appearance. — American Journal of Science, Vol. III. No. 2. p. 354. 14. Camphor.—" In the last Number of the... | |
 | 1821 - Liczba stron: 452
...from a weaker, arsenical solution. Coffee was then added to the solution of copper and of carbonate of potash, but without arsenic, and the effect resembled...of silver used by Dr. Porter, was the lunar caustic dissolved, and the chromate of potash contained an excess of alkali, having been formed by heatinj... | |
 | 1822 - Liczba stron: 502
...produced could not be distinguished by the eye from Scheele's green. Also that Mr. Hume's test of ihe nitrate of silver (as modified in its application...produced by arsenic, could not be distinguished by colour or appearance from it. — Silliraan's Jour. iii. p. 355. . 7. On the detection of Arsenic in... | |
 | John Ryley, John Gawthorp, John Whitley - 1822 - Liczba stron: 344
...Also, that Mr. Hume's test of the nitrate of silver (as modified in its application by Dr. Marcel,) gave, with chromate of potash, a yellow precipitate,...produced by arsenic, could not be distinguished by colour or appearance from it. — Silliman's Journ. iii. p. 355. STEAM ENGINES. M. Dupin, whilst speaking... | |
 | John Ayrton Paris, John Samuel Martin Fonblanque - 1823 - Liczba stron: 556
...the difficulty of its examination. OBJECTION 3. Chromate of potass produces with nitrate of silver a yellow precipitate, which, when placed side by side with one produced by arscnious acid, cannot be distinguished by colour or appearance from it. This fact has lately been... | |
 | Theodric Romeyn Beck - 1825 - Liczba stron: 696
...Marcel's test was applied to a solution of chroraate of potash, a yellow precipitate was produced, which, " when placed side by side with one produced...arsenic, could not be distinguished by their colour .and appearance."-}When the chromate was substituted for arsenic in the production of Scheele'» green,... | |
 | John Ayrton Paris - 1825 - Liczba stron: 1036
...detecting minute poitions of arsenic. OBJECTIONS. Chromate of potass produces, with Nitrate of Silver, a yellow precipitate which, when placed side by side with one produced by Arsenious acid, cannot be distinguished by colour or appearance from it. This fact has lately been... | |
| |
