| 摘要 |
The volume measurement method includes measuring the wt. of the sample by means of a balance within a sealed vessel contg. a gas. The gas in the vessel is then replaced with a second gas having a density different from that of the first. The wt. of the sample is then measured by means of the balance within the sealed vessel contg. the second gas. This determines change of wt. of the sample corresp. to the change of the gas in the sealed vessel. The vol. of the sample is calculated, according to Archimedes' principle, as a function of the value of the difference between the density of the first gas and the second gas and the value of the change of wt. of the sample corresp. to the change of the gas.
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