Rotary evaporator for accurately and quantitatively recovering multiple solvents or concentrating multiple samples at one time

A rotary evaporator for quantitatively concentrating multiple samples at once, comprising:

• a support frame;
• a motor fixed on the support frame;
• a transmitter;
• a distillation flask group detachably fixed at a first end of the transmitter, the distillation flask group comprising a plurality of distillation flasks on at least one rotation axis;
• a condenser or a condenser group detachably connected at a second end of the transmitter, the condenser group comprising a plurality of condensers;
• wherein:
• the motor is configured to drive the distillation flasks on at least one rotation axis to rotate through the transmitter;
• a collecting flask is connected to a bottom of each condenser;
• each rotation axis is provided with one distillation flask or at least two distillation flasks connected in sequence and rotated along the same rotation axis, each distillation flask is connected to a concentrated liquid quantitative assembly;
• and a connector is disposed between the condenser and the transmitter when the number of distillation flasks on any rotation axis is greater than 1,
• wherein a second flask opening of a first distillation flask and a first neck or a first opening of a second distillation flask on the same rotation axis are connected in a sealed way and fixed by a clamp, or the first distillation flask and the second distillation flask are connected by a coupling in a sealed way.