Electronic Balance and Some Gravimetric Applications. (The Density of Solids and Liquids, Pycnometry and Mass)

摘要

In recent years the electronic force balance has been perfected to a degree that it can replace the mechanical balance in both precision and capacity. Hence, the mechanical balance is rapidly disappearing from the scene. The work reported here describes the use of the electronic balance in some high precision gravimetric applications. The balance has been examined from the user's viewpoint and its use is illustrated in measuring solid and liquid densities and mass. The density assigned to a silicon crystal is in good agreement with its accepted value to within 2.4 ppm. Likewise, the water density measurements substantiate Kell's equation for the density of water near 23 degrees Celsius. (Copyright (c) ISA, 1993.)