Gravimetric Buoyancy
| VWR Analytical Balance |
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| Mass Range: 10mg - 160g |
| Precision: 0.1mg (0.0001g) |
The MILL has a scale sensitive to +/- 0.0001 grams. It is useful for determining density by Archimedes method and can be used to take measurements over time. For example, it could be used to measure the rate at which a liquid evaporates.
Archimedes Method
The Archimedes method is used to determine the density of samples without needing to measure the sample’s physical dimensions. The difference in mass between the dry and submerged samples (in g) is equal to the volume of water displaced by the submerged sample (in mL or cm^3) because water has a density of 1gm. The density of the sample can then be found by taking the dry mass and dividing it by this volume. This method should only be used with samples that will not dissolve in water, as it will not work properly with water-soluble samples.