A Course of Practical Chemistry: Arranged for the Use of Medical Students

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Samuel Highley, 1854 - 108 Seiten
 

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Seite 106 - To a portion of urine in a test-tube add a drop or two of a solution of sulphate of copper, and...
Seite 56 - Extract the color with alcohol. Dip a piece of filter paper into this tincture and dry at 100° C. Then moisten in a weak solution of boric acid to which a few drops of hydrochloric acid have been added. On drying this a cherry-red color will be developed in the presence of turmeric, which is characteristic. 9. Detection of Caramel. (a) AMTHOR TEST.
Seite 75 - Transfer this dried cake, with the least pos? ible amount of breaking, into a test-tube, and add rather more than an equal bulk of cold distilled water, agitate gently, and after some little time pour away the liquid, boil the residue in water, and filter the hot solution. Boil the filtrate with a little animal charcoal, and then add gradually some finely-powdered chalk as long as any effervescence is produced, filter, and evaporate the clear liquid in a water-bath.

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