Rotary evaporator capable of accurately quantifying distillate

A rotary evaporator capable of quantifying distillate, comprising a support frame, a distillation flask and a condenser dismountably fixed on the support frame, a collecting flask, and a distillate quantification assembly for quantifying the distillate,

• wherein the distillation flask is configured to be heated through a heating assembly, the condenser is coupled with the distillate quantification assembly, and a bottom of the condenser is connected with the collecting flask;
• wherein a collecting flask liquid release opening is at a bottom of the collecting flask, the collecting flask liquid release opening is connected with the distillate quantification assembly;
• wherein the distillate quantification assembly is configured to be connected with a bottom of the collecting flask and includes a metering tube with metering scale lines, a first liquid release valve and a second liquid release valve, liquid discharge of the distillate and sealing of distillate quantification assembly are controllable through the second liquid release valve disposed at a bottom of the metering tube;
• wherein the first liquid release valve is disposed at the collecting flask liquid release opening, and is configured to control discharge of the distillate and sealing of the collecting flask;
• wherein the metering tube has a cavity of a tubular structure having a metering capacity in a range from 1 mL to 20 mL, and a metering scale with an accuracy to 0.01 mL, and
• wherein a tail end of the distillate quantification assembly is configured to be connected with at least one of a plurality of first containers in a sealed way, and the plurality of first containers are configured to increase metering capacity of the distillate.