The Science Record for 1874: A Compendium of Scientific Progress and Discovery During the Past Year, With Illustrations (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from The Science Record for 1874: A Compendium of Scientific Progress and Discovery During the Past Year, With Illustrations

Mitscherlich has recently discovered a new mode by which, by direct analysis, not only the carbon, oxygen, and h drogen in an organic substance can be determined, but a so the chlorine, bromine, sulphur, iodine, phosphorus, and probably also the nitrogen therein contained. The orga nic material is brought to combustion with oxide Of mer cugy, the results of which process are water, carbonic acid, an mercury. The two former are weighed in the ordi nary manner. The weight of the mercury formed serves to determine the quantity of oxygen due to combustion, by subtracting which from that contained in the carbonic acid and the water, the total amount of oxy en existing in the substance submitted to elementary ana ysis is found. If, however, the body under examination contains chlorine, bromine, or iodine, these elements combine with the mer cury set free, and are determined by weighing. Sulphur and phosphorns combine in the state of sulphate and of phosphate of oxide of mercury.

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