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  • General

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    • Professor Seki retired from Hokkaido University in March, 2024.

  • Guerlussac-type specific gravity bottle (Pycnometer)


    • 毛細管:capillary tube

      本体:body 


    • How a pycnometer works


      When you fill the body with distilled water and insert a capillary tube, the water rises to the top of the capillary tube and fills it. This allows the same volume of water to be added at all times.

  • Density measurement of solids

    • Weigh the density of solids

      1)Weigh the mass (WP) of the solid in a dry pycnometer.

      2)Water is added to about 80% of the above pycnometer, and the pores of the solid are degassed in a boiling water bath or a vacuum bottle.

      3)After the pycnometer has returned to room temperature, fill the pycnometer with water.

      4)Weigh the mass (WPW) by inserting a capillary tube.