Home › Tests Or Reagents › To Detect Sulphur in Coal-Gas

To Detect Sulphur in Coal-Gas

The presence of sulphur in coal-gas can be proved in the following simple manner:

Let a platinum basin be filled with a pint of water, and the basin be heated over a spirit lamp until all the liquid has evaporated; the basin will be found to be coated on the outside, where it has been struck by the flame, with a dirty, greasy looking substance, which, on being washed off with pure distilled water, and tested, proves to be sulphuric acid. The a little of the test be added to ordinary spring glass chimneys used with Argand gas-burners water, the carbonic acid present in the latter soon become coated over internally with a will neutralize the ammonia and precipitate the chloride. The above forms a good lecture experiment, the test being a very delicate one. white substance, which, on being washed off with distilled water, will be found to be, on testing, sulphate of ammonia. The glass panes of a room wherein gas is burned for

4395. Permanganate of Potassa as a a few evenings consecutively, will, when rub- Test for Organic Matter. As a test for bed with the fingers of a clean hand, impart organic matter in air and water, its accuracy to it a substance which, on the hand being has been called in question, on the ground rinsed in distilled water, will yield a precipi that it does not attack all kinds of organic tate of sulphate of baryta with chloride of TEST PAPERS. barium, and a brick-red precipitate with po- 4406. Το Detect Artificial Coloring tassio-iodide of mercury. in Wine. Use, as test liquid, a solution of potash and a solution of liquid ammonia and potash.

If the wine is colored by the coloring matter of the grape, potash changes the red