 | Chemical Society (Great Britain) - 1928 - 2022 Seiten
...with 50% aqueous potassium hydroxide (3 cc). The solution was kept for 24 hours, acidified faintly with hydrochloric acid, and evaporated to dryness. The residue was extracted with absolute alcohol, and picric acid added; l-methyl-5-hydroxymethylglyoxaline picrate (0-28 g. ; mp 166°;... | |
 | Chemical Society (Great Britain) - 1922 - 1468 Seiten
...ether, which removed 3-5 grams of crude 4-bromoglyoxaline. The aqueous mother-liquor was acidified with hydrochloric acid, and evaporated to dryness. The residue was extracted with alcohol, which removed a very small quantity of brown syrup, which crystallised on the addition of... | |
 | Edward Hart - 1889 - 496 Seiten
...portion of the natural water served for the determination of lithium as well as sodium and potassium. The portion for analysis was acidified in platinum with...the precipitated silica by filtration, and to the nitrate was added, with care to secure a sufficiency and yet to avoid a great excess, barium hydrate... | |
 | Geological Survey (U.S.) - 1889 - 1236 Seiten
...Tht portion for analysis was acidified in platinum with hydrochloric acid and evaporated to dryncss. The residue was extracted •with hot water slightly...by filtration, and to the filtrate was added, with tare to secure a sufficiency and yet to avoid a great excess, barium hydrate made from the nitrate,... | |
 | 1889 - 688 Seiten
...the natural water served for the determination of the lithium as well as sodium and potassium. The portion for analysis was acidified in platinum with...hydrochloric acid and evaporated to dryness. The residue was extraâed with hot water slightly acidulated with hydrochloric acid, the solution was separated from... | |
 | Victor Clarence Vaughan, Frederick George Novy - 1891 - 410 Seiten
...acetate, and the resulting filtrate, after the removal of the lead by hydrogen sulphide, was acidulated with hydrochloric acid and evaporated to dryness. The residue was extracted with absolute alcohol, whereby betaine, on account of its insolubility, is removed, and the alcoholic solution... | |
 | Ira Remsen, Charles August Rouillu - 1895 - 830 Seiten
...the alcoholic filtrate from the insoluble acid-amide was in some instances concentrated, acidulated with hydrochloric acid, and evaporated to dryness. The residue was extracted with hot absolute alcohol. When cold, the alcohol gave a deposit of long white silky needles. These, when washed... | |
 | Victor Clarence Vaughan, Frederick George Novy - 1896 - 640 Seiten
...acetate, and the resulting filtrate, after the removal of the lead by hydrogen sulphide, was acidulated with hydrochloric acid and evaporated to dryness. The residue was extracted with absolute alcohol, whereby betain, on account of its insolubility, is removed, and the alcoholic solution... | |
 | Victor Clarence Vaughan, Frederick George Novy - 1896 - 638 Seiten
...acetate, and the resulting filtrate, after the removal of the lead by hydrogen sulphide, was acidulated with hydrochloric acid and evaporated to dryness. The residue was extracted with absolute alcohol, whereby bctain, on account of its insolubility, is removed, and the alcoholic solution... | |
 | Victor Clarence Vaughan - 1902 - 520 Seiten
...acetate, and the resulting filtrate, after the removal of the lead by hydrogen sulphid, was acidulated with hydrochloric acid and evaporated to dryness. The residue was extracted with absolute alcohol, whereby betain, on account of its insolubility, is removed, and the alcoholic solution... | |
| |
Tht portion for analysis was acidified in platinum with hydrochloric acid and evaporated to dryness. The residue was extracted •with hot water slightly acidulated with hydrochloric acid, the solution was separated from the precipitated silica by filtration,... 