Plattner's Manual of Qualitative and Quantitative Analysis with the BlowpipeVan Nostrand, 1892 - 548 páginas |
Términos y frases comunes
alkaline alloy alumina ammonia amount antimony arsenous acid assay bead becomes bismuth bisulphate of potassa blowpipe blue flame boracic acid borax borax-glass capsule carbonate chloride clay crucible closed tube coal in R. F. coat cobalt colorless colors the flame combined compounds cooling copper crucible cupel Dana decomposed detected dissolved earthy easily filter fluorine fluxes forceps formed fused fusible fusion globule gold heated hydrochloric acid ignited lime litharge magnesia manganese mass matrass metallic oxides metallurgical products millim minerals mixed nickel nitric acid obtained odor opaque open tube oxide oxide of antimony oxide of copper oxide of lead platinum wire powder precipitate present protoxide pure quantity reaction reduced residue roasted salt separated sesquioxide sesquioxide of iron silicates silver button slag soda solution spoon sublimate substance contains sulphate sulphide sulphuric acid test lead titanic acid treated trifling vide volatile weighed yellow zinc
Pasajes populares
Página xvi - TREATMENT OF THE FIRST PORTION. — Dissolve a very small quantity in borax on platinum wire in the OF, and observe the color produced. Various colors will be formed by the combination of the oxides. Saturate the bead, and shake it off into the porcelain dish. Repeat this once or twice. a. Treat these beads on Ch. with a small piece of lead, silver or gold, in a strong RF b.
Página xvii - Hg with dry soda in a closed tube, p. 804. 8. Mix some of the substance with assay lead and borax glass and fuse on Ch. in the RF, p. 401. Cupel the lead button for Ag, p.
Página xvi - Remove the lead button from the bead while hot, or by breaking the latter when cold, on the anvil between paper, carefully preserving all the fragments. d. If Co is present, the bead will be blue. If a large amount of Fe is present, add a little borax to prove the presence or absence of Co.
Página i - Plattner's Manual of Qualitative and Quantitative Analysis with the Blow-Pipe. From the last German Edition, revised and enlarged. By Prof. TH. RICHTER, of the Royal Saxon Mining Academy. Translated by Prof. HB CORNWALL, Assistant in the Columbia School of Mines, New York.
Página 350 - ... telluride of sodium has been formed, which dissolves in hot water with a purplish-red color. This test is applicable to show the presence of tellurium in a great many compounds, even when it occurs in the oxidized state. Natural tellurium compounds, when gently heated in a matrass with an excess of sulphuric acid, impart to it a purple or hyacinth-red color, which disappears on adding water, while a blackish-gray precipitate is formed. When a mineral containing tellurium is treated on coal it...
Página xvi - Bi (298). b. If there are no volatile substances present, divide a part of the substance into three portions, and proceed as in A. a. Yellow coat, yielding with S.Ph. a black bead ; disappearing with blue flame ; no part of it yielding greenish Sb flame : Pb and Bi.
Página xvii - An make the special test No. 8. B. TREATMENT OF THE SECOND PORTION. — Drive off the volatile substances in the OF on Ch. Treat with the R. F., or mix with soda, and then treat with the RF, for Zn, Cd, Sn. If a white coating is formed, test with cobalt solution and observe the color.
Página xvii - RF, or with try soda in a closed tube, p. 345 el stg. 4. Dissolve in S. Ph on platinum wire in the OF, (if the substance is not metallic and does not contain any S.,) and test for Sb ou Ch with tin in the RF, p.
Página xvi - Yellow coat, generally with white border, yielding black or gray bead with S. Ph, disappearing with blue flame ; also the border disappearing with green flame ; Pb and Sb. e. Yellow coat, very similar to 6, but yielding no blue flame ; Bi and Sb.
Página xvii - J&fn with nitrate of potassa. § 90. 3. Test for As with soda on Ch. in the RF, or with dry soda in a closed tube.