A Laboratory Guide in Urinalysis and Toxicology

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W. Wood, 1903 - Poisons - 228 pages
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Page 291 - ... water; and (2) a 0.5 per cent. solution of sodium nitrite. To make the test, I cc of (2) is added to 40 cc of (1), and the mixture thoroughly shaken. Equal quantities of this mixture and the urine to be tested are shaken together in a test tube, and I cc of ammonia is then floated upon the surface, when, in an affirmative result, a red band is formed at the junction of the fluids. Its diagnostic value is uncertain. Von Jaksch "disclaims for this test any clinical importance whatever.
Page 291 - The filtrate is mixed with an equal volume of fuming hydrochloric acid containing 3 to 1,000 of ferric chloride, a few drops of chloroform are added, and the mixture strongly shaken one to two minutes. With normal urine the chloroform remains colorless, or almost so, but if an excess of indoxyl compounds be present the chloroform is colored blue. and the depth of the color is a rough indication of the degree of the excess.
Page 311 - ... 7791. The product is the amount of urea in grams in 100 cc...
Page 375 - ЬС .S a -t> л tl g та -4^1 the flask is closed with a cork, through which passes a glass tube of 8 mm.
Page 379 - This reaction, like the subsequent ones, is best performed by placing a drop of the liquid under examination and one of the reagent near each other on a slip of black glass and bringing the two together with a pointed glass rod.

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