General
This test method is applicable to liquids of vapor pressures below 600 mm Hg (80 kPa) and viscosities below 40 000 cSt at the test temperature. This test method can be used at temperatures between 20 and 100°C. It can be used at higher temperatures; however, in this case the stated precision of this test method does not apply.
For determination of density of materials, fluid at room temperature, use Test Method D 1217. This test method also provides a calculation procedure for converting density to specific gravity.
Test
The liquid sample is introduced into the pycnometer, equilibrated to the desired temperature, and weighed. The density or relative density is then calculated from this weight and the previously determined calibration factor, and a correction is applied for the buoyancy of air.
Precision
This test method has a repeatability of 0.00005 and a reproducibility of 0.00014 g/mLfora pycnometer volume of 10 mL. This precision statement may not apply if a pycnometer other than 10 mL in volume is used or if the temperature of test exceeds 100°C.
The difference of results froin the established value when compared to pure reference materials is not expected to be more than ±0.00014 g/mL. Specific bias has not been established for this test method.