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" ... open glass tube, evolve sulphurous acid and yield a sublimate of arsenous oxide. To show in a very decisive manner the presence of arsenic in any of its combinations with sulphur, the powdered assay [No. 80] is mixed with four volumes of neutral oxalate... "
A Manual of Blow-pipe Analysis: And Determinative Mineralogy - 42. lappuse
autors: William Elderhorst - 1867 - 159 lapas
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Instruction in Chemical Analysis (qualitative)

C. Remigius Fresenius - 1850 - 368 lapas
...and sufficiently from antimony. This reduction is very readily effected before the blow-pipe by means of a mixture of equal parts of cyanide of potassium and carbonate of soda; but care should be taken that the peroxide of tin be not mixed with nitrate of potassa — since this...
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Chemical News and Journal of Industrial Science, 9. sējums

1864 - 332 lapas
...is only necessary to fuse an oxide, or any pure salt of uranium, with four or five times its weight of a mixture of equal parts of cyanide of potassium and carbonate of potash. The fused mass is first washed with a solution of salammoniac, and then with pure water. The...
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Elderhorst's Manual of Qualitative Blow-pipe Analysis: And Determinative ...

William Elderhorst - 1873 - 314 lapas
...[No. So] is mixed with four volumes of neutral oxalate of potassa and a little charcoal powder, or with six parts of a mixture of equal parts of cyanide...will be deposited in the colder part of the tube. (Fig. 18.) Fig, 18, § 56. When sulph-arsenides are heated on Ch., the whole of the arsenic, especially...
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Elderhorst's Manual of Qualitative Blow-pipe Analysis and Determinative ...

William Elderhorst - 1874 - 340 lapas
...[No. 80] is mixed with four volumes of neutral oxalate of potassa and a little charcoal powder, or with six parts of a mixture of equal parts of cyanide...will be deposited in the colder part of the tube. (Fig. 18.) Fig. 18. §56. When sulph-arsenides* are heated on Ch., the whole of the arsenic, especially...
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Manual of Determinative Mineralogy: With an Introduction on Blow-pipe Analysis

George Jarvis Brush - 1875 - 442 lapas
...by pulverizing and placing them in a glass bulb, covering them with six times their weight of a dry mixture of equal parts of cyanide of potassium and carbonate of soda. The bulb should not be more than half filled with the mixture (Fig. 23). It is first gently heated ; if...
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Geology: Physical geology, 1. daļa

Alexander Henry Green - 1882 - 762 lapas
...the above reactions. For these a tube with a bulb at one end is taken and the bulb half filled with a mixture of equal parts of Cyanide of Potassium and Carbonate of Soda : this is gently warmed and any moisture which condenses in the tube is removed by a roll of blottingpaper....
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Mineralogy Simplified: Easy Methods of Identifying Minerals, Including Ores ...

Henry Erni - 1901 - 442 lapas
...by pulverizing and placing them in a glass bulb, covering them with six times their weight of a dry mixture of equal parts of cyanide of potassium and carbonate of soda. The mass is next gently heated, and the moisturfi, if any be present, removed by inserting a piece of bibulous...
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