How is the capillary action related to the uptake?

Determination of density of liquids

Scales and weighing; Devices for Inorganic Micro-Weight Analysis pp 278-282 | Cite as

  • A. A. Benedetti-Pichler
  • Friedrich Hecht
Part of the Handbook of Microchemical Methods book series (HBMM, volume 1/2)


Fig. 119 shows the micropyknometer according to G. R. Clemo and A. McQuillen (3). It has bores as thin as a hair (diameter 4 μ) on both sides, which widen in the middle to form a capillary with a diameter of 0.4 mm. The authors used the pycnometer to determine the density of hexadeuterobenzene. It is filled by simply dipping it into the liquid, which has previously been cooled by 0.2 ° below the temperature of the weighing chamber. The filled apparatus is wiped on the outside, cleaned with a camel hair brush to remove any dust that may have adhered, and put on the shell microchemical balance brought. After 5 minutes, the temperature of the liquid has reached equilibrium. The small amount of liquid that escapes evaporates immediately, but practically no further liquid evaporates from the fine capillaries within half an hour, as the authors were able to determine by microweighing. To touch the device one uses tweezers with ivory tips. Let the pycnometer stand on the weighing pan for 15 minutes before weighing; A vessel very similar to the pycnometer serves as the tare.

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Copyright information

© Springer-Verlag Vienna 1959

Authors and Affiliations

  • A. A. Benedetti-Pichler
  • Friedrich Hecht
  1. 1.The Queens College of the College of the City of New YorkFlushingUSA
  2. 2. Analytical Institute, University of Vienna, Austria