Determination of radicles in carbon compounds / by Dr. H. Meyer. Authorized translation by J. Bishop Tingle.

  • Meyer, Hans (Hans Johannes Leopold), 1871-
Date:
1903
Catalogue details

Licence: In copyright

Credit: Determination of radicles in carbon compounds / by Dr. H. Meyer. Authorized translation by J. Bishop Tingle. Source: Wellcome Collection.

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    termination is made immediately after the completion of the blank experiment and, if necessary, repeated a second or third time; since 200 cc Fehling’s solution readily liberates 150 cc nitrogen, the quantity taken in A amply suffices for three or four carbonyl determina- tions. As benzene is produced during the oxidation of the phenylhydrazine, a drop of it will be found floating on the surface of the water inside the measuring tube; this may be allowed for in measuring the gas or it may be removed. In the former case a little more benzene is introduced into the tube by means of a bent pipette, and, after remaining during a short time, the volume of nitrogen is read off in the ordinary manner; its reduction to o° and 760 mm may be made by the help of the following table, the values in the second column being subtracted from the observed height of the barometer: Temperature. Tension of benzene -)~ water. 15°C. 72.7 mm. 16 76.8 17 80.9 18 85.2 19 89-3 20 93-7 21 98.8 22 103.9 23 109.1 24 114*3 25 119-7 The values given above are in part obtained by in- terpolation from Regnault’s results and are therefore