The use of the blowpipe, in the qualitative and quantitative examination of minerals, ores, furnace products and other metallic combinations / Edited, with emendations, by Dr. Sheridan Muspratt. With a preface by Baron Liebig.

  • Karl Friedrich Plattner
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: The use of the blowpipe, in the qualitative and quantitative examination of minerals, ores, furnace products and other metallic combinations / Edited, with emendations, by Dr. Sheridan Muspratt. With a preface by Baron Liebig. Source: Wellcome Collection.

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    and reducing flames, thus resembling oxides of tellurium or antimony; these are particularly the following:—sulphides of potassium and sodium; chlorides of potassium, sodium, ammonium, lead, and mercury; bromides of potassium and sodium; and iodides of potassium and sodium. The most volatile of these combinations are the chlorides of ammonium, mercury, and lead; the first two volatilize without melting, the others require to he strongly treated in the reducing flame, and the majority of them are absorbed by the charcoal before sublimation takes place. The sublimates from the most volatile are generally deposited at some distance from the assay, while those of the less volatile lie nearer the assay, and are more difficultly displaced by the flame. These sublimates are distinguishable from those of the oxides of tellurium and antimony, inasmuch as they disappear in the reducing flame without producing any color. H Qualitative Examination of Minerals, Ores, and the Products of Metalluryic operations for Metallic and Non-metallic Bodies before the Blowpipe. (a) Examination of the Metallic Oxides which form Alkalies AND Earths. § 1. POTASSA — [K 0].—Presence in the Mineral Kingdom. Potassa is found in combination with acids only, as for example: — {a) With Sulphuric Acid, as well per se, as in combina¬ tion with Earths and Water, namely, per se, in Sulphate of Potassa [K O, S 0^]; with Sulphate of Alumina, in Alurn [K 0, S -j- AE O^, 3 S 0^ + 24 aq]; and with Sulphates of Lime and Magnesia, in Potassa-Pollyhallite [K 0, S 0^ + Mg 0, S O' + 2 (Ca 0, S O') + 2 aq]. {b) With Nitric Acid, in Saltpetre [K 0, N O'], but gene-