Oscillatory method
Range: 95-100
Unit: % v/v
Objects: ethyl alcohol
The method covers the measurement of the oscillation period of the capillary filled with the test sample, which clearly depends on the density, and on this basis, the proof reading from alcoholometric tables.
According to PN-A-79521 “ Absolute ethanol", the absolute denaturated fuel ethanol should have the proof not less than 99.6% v / v, at 20 OC.