Select Methods in Chemical Analysis. (Chiefly Inorganic). |
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Common terms and phrases
added alkaline aluminium ammonia amount analysis apparatus arsenic assay barium beaker boiling carbonate of ammonium carbonate of calcium carbonate of sodium carbonic acid caustic cent chlorate of potassium chloride of ammonium chloride of barium chloride of silver chromic acid cobalt colour containing cool copper crucible cupel decomposed determined dilute dissolved distilled dried employed Estimation evaporated to dryness excess filter filtrate flask fused glass grains grammes grms heat hydrochloric acid hydrogen ignited insoluble iodide iodine iridium iron lead lime liquid magnesium manganese mercury metals method mineral mixed mixture nickel nitrate nitric acid obtained oxide oxidised oxygen permanganate phosphate phosphoric acid platinum porcelain portion potash potassium powder precipitate present protochloride protoxide pure residue rhodium ruthenium sal-ammoniac salt separated sesquioxide silica small quantity sodium soluble substance sulphate sulphide of ammonium sulphuretted hydrogen sulphuric acid temperature thallium titanic acid trace tube washed water-bath weighed zinc
Popular passages
Page 23 - ... acid, as even a large excess has no effect on the accuracy of the analysis. ' The flask is now warmed very gently, and before it reaches the boiling-point of water a gaseous decomposition will take place with great rapidity. This is caused by the decomposition of the salammoniac.
Page 27 - ... but still too much to be omitted in an accurate analysis. This also must be arrived at, and it can be accomplished in the following manner: — 57. After the fused mass has been treated with water, filtered and washed, as in (54), the filter and its contents are dried ; the latter are detached from the filter, and rubbed up in a glazed mortar with an amount of sal-ammoniac equal to one-half the weight of the mineral, and reheated in a platinum crucible exactly as in the first instance, treated...
Page 28 - In many analyses made, one fusion sufficed for the entire extraction of the alkalies; but as a few tenths would occasionally remain behind, we preferred the additional fusion to get at that small quantity, and to entitle it to rank as a method by which all but the merest trace of the alkalies could be extracted from the insoluble silicates. 59. The proportion of sal-ammoniac added to the carbonate of lime as here recommended, was arrived at after numerous experiments.
Page 267 - Reinsch-s process, the amount of metal dissolved is scarcely appreciable, it is quite unnecessary to submit any considerable quantity of it to examination. If a solution of four or five grains of the copper does not yield any evidence of arsenic, it is quite pure enough for the purpose, even though a little arsenic should be recognised in the solution of a larger quantity. As a means of detecting traces of arsenic in copper, Dr.
Page 142 - When the iron is quite dissolved, 3o grs. of the finely-pounded and dried sample of manganese ore to be tested are put into the flask, the cork replaced, and the contents again made to boil gently over a gas flame until it is seen that the whole of the black part of the manganese is dissolved. The water in the small flask or beaker...
Page 408 - ... has been driven off by gradually increasing the heat, the temperature of the dish is brought up to a point a little below redness, the cover being off. (The cover can be cleaned from any sal-ammoniac that may have condensed upon it by heating it over the...
Page 81 - Afterward, pour off as exactly as possible the clear liquid into a graduated burette. Upon the black residue remaining in the tube pour some drops of nitric acid and heat carefully over a lamp. If there is no further liberation of gas, the residue consists of nothing but graphite or silica.
Page 391 - Mariotte's law : that the volume of a gas is inversely as the pressure to which it is subjected.
Page 283 - ... with chloride of barium. The operation of reduction is hastened by concentrating the fluid ; in doing which care must be taken to guard against explosion, on account of the hydrogen. The separated metals are treated with aqua regia, and the platinum and palladium thus dissolved separated from each other as already described. The traces of rhodium and iridium in the...
Page 200 - In this case, according to the experience of the writer, the iron pyrites will, almost invariably, hold minute traces of copper. Hence the desirability, on exploring expeditions more especially, of some ready test, by which, without the necessity of employing acids or other bulky and difficultly portable reagents, these traces of copper may be detected.