Tech Team · Kintek Solution

To stop a rotary evaporator, follow these steps:

1. Remove the Flask from the Heat Bath: This step is crucial to stop the heating process and prevent the sample from overheating or boiling over.

2. Open the Stopcock: Opening the stopcock breaks the vacuum, allowing atmospheric pressure to equalize within the system.

3. Halt the Rotor: Stopping the rotation of the flask prevents further agitation and evaporation.

4. Turn Off the Vacuum/Aspirator: With the vacuum source turned off, the system pressure will stabilize, and the evaporation process will cease.

5. Disconnect the Flask: Carefully remove the round-bottom flask from the adapter.

6. Check for Complete Evaporation: If the solvent has not been completely removed, the process may need to be repeated.

Each of these steps is designed to safely and effectively halt the rotary evaporation process, ensuring the integrity of the sample and the longevity of the equipment.

6 Simple Steps to Safely Stop Your Rotary Evaporator

1. Remove the Flask from the Heat Bath

This step is crucial to stop the heating process and prevent the sample from overheating or boiling over. By removing the flask, you also reduce the risk of thermal stress on the glassware.

2. Open the Stopcock

Opening the stopcock breaks the vacuum, allowing atmospheric pressure to equalize within the system. This prevents any sudden pressure changes that could lead to bumping or damage to the equipment.

3. Halt the Rotor

Stopping the rotation of the flask prevents further agitation and evaporation. This is typically done by turning the rotation dial to zero.

4. Turn Off the Vacuum/Aspirator

With the vacuum source turned off, the system pressure will stabilize, and the evaporation process will cease. This is essential to prevent any residual solvent from continuing to evaporate.

5. Disconnect the Flask

Carefully remove the round-bottom flask from the adapter. This step ensures that the flask can be safely handled and stored or further processed if necessary.

6. Check for Complete Evaporation

If the solvent has not been completely removed, the process may need to be repeated. This involves reattaching the flask, re-establishing the vacuum, and restarting the rotation and heating.

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