A short manual of analytical chemistry, qualitative and quantitative,--inorganic and organic . To estimate the sugar.—This is best done by taking 10 grammes ofthe urine and diluting it with water to 100 Place thissolution into a burette, and run it gradually into 10 ofPavys or Fehlings solution, kept boiling in a flask as directedunder the Volumetric Analysis of Sugar, page 121. Thenumber of of urine used will contain 005 gramme of grape. ANALYSIS OF URINE. 189 sugar if Pavys solution, or 05 gramme if Fehlings was used, and then ^°°^°°5 (Pavy) or 12^2^ (Fehling) = sugar u
A short manual of analytical chemistry, qualitative and quantitative,--inorganic and organic . To estimate the sugar.—This is best done by taking 10 grammes ofthe urine and diluting it with water to 100 Place thissolution into a burette, and run it gradually into 10 ofPavys or Fehlings solution, kept boiling in a flask as directedunder the Volumetric Analysis of Sugar, page 121. Thenumber of of urine used will contain 005 gramme of grape. ANALYSIS OF URINE. 189 sugar if Pavys solution, or 05 gramme if Fehlings was used, and then ^°°^°°5 (Pavy) or 12^2^ (Fehling) = sugar used used the 10 grammes of urine taken. («) Estimation of sugar by fermentation.—Take one gramme of commer-cial compressed yeast (or Jj- of a cake of Fleischmanns Yeast),shake thoroughly in the graduated test-tube with 10 ofthe urine to be examined. Then pour themixture into the bulb of the saccharo-meter. By inclining the apparatus themixture will easily ilow into the cylinder,thereby forcing out the air. Owing to theatmospheric pressure the fluid does notflow back, but remains there. The ap-paratus is to be left undisturbed for 20 to24 hours in a room of ordinary tempera-ture. If the urine contains sugar, alcoholic fermentation begins in about 20 to 30 minutes. The evolved carbonic acid gas Fig. 49. gathers at the top of the cylinder, forcing the fluid back intothe bulb. On the following day the upper part of the cylinderis fi
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectchemistryanalytic
