| 摘要 |
A centrifugal evaporator for evaporating a mixture of liquids having different volatilities and specific gravities, contained in a test tube 14 pivotally mounted on a rotatable support arm 12 in a sealable vacuum chamber 16. The support arm is rotated up to a speed of the order of 2000 rpm before the pressure is reduced sufficiently to allow evaporation of the more volatile component to occur, and only then is the chamber progressively evacuated. The motor is preferably a three-phase induction motor connected to an electricity supply via a frequency convertor.
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