The water bath rotary evaporator, through precise structural design and clever combination of physical principles, not only improves experimental efficiency but also meets the requirements of operational safety and sample protection. It is one of the essential core equipment in modern chemical laboratories.

The main advantages of the water bath rotary evaporator are:

1. Efficiency and uniformity: The liquid film formed by rotation increases the evaporation rate per unit time, and combined with a reduced pressure environment, the processing efficiency far exceeds traditional atmospheric distillation methods. Meanwhile, uniform heating of the sample reduces the risk of component degradation.

2. Low temperature protection feature: Due to reduced pressure, the boiling point of the solvent is lowered, allowing for safe concentration of temperature sensitive biomolecules or active pharmaceutical ingredients, avoiding high temperature damage to the sample structure.

3. Convenient operation: Modern models are equipped with intelligent lifting systems, such as the design of automatically lifting the flask when power is off, which not only ensures experimental safety but also simplifies the operation process. The clear interface and abundant teaching resources further lower the learning threshold.

4. Wide applicability: From the purification of chemical synthesis products to the extraction of natural products, from small-scale laboratory preparation to industrial production scaling up experiments, this equipment has become an important cross disciplinary tool due to its controllability and reliability.

5. Energy saving and environmental advantages: Compared to old devices that rely heavily on cooling water, the new equipment reduces energy consumption by optimizing heat conduction design and accurate energy input. The closed loop system also reduces the impact of harmful solvent volatilization on the environment.

Measurement steps of water bath rotary evaporator:

1. Instrument preparation: Before starting the operation, ensure that all necessary equipment and reagents are ready. Check the external and internal cleanliness of the equipment to ensure that it is in good working condition; Simultaneously confirm that the heating block at the bottom of the rotary evaporator is stable and correctly installed.

2. Sample preparation: Place the test sample in a dry container. If it is a solid sample, it can be dissolved in an appropriate solvent. Ensure the container is sealed to prevent harmful gas leakage.

3. Parameter setting: Turn on the power switch, set the rotation speed, and generally control the initial speed at 30-60 revolutions per minute; Set the appropriate water bath temperature based on the characteristics of the sample, usually 10-20 ℃ lower than the boiling point of the sample. For solvents of different properties, such as low boiling point solvents, the water bath temperature can be set to 30 ℃; High boiling point solvents have a temperature of 60 ℃. It is also necessary to choose a suitable feeding method according to the experimental requirements, such as continuous feeding or intermittent feeding.

4. Sample loading: Evenly load the prepared sample into the sample bottle of the rotary evaporator, ensuring that the sample bottle mouth is intact and the bottle cap is tightly sealed after loading to avoid overflow caused by excessive loading.

5. Start evaporation: Activate the rotation function and observe whether the evaporation bottle rotates smoothly. Then turn on the vacuum pump and slowly adjust the vacuum degree to gradually reduce the system pressure to avoid sample boiling. Then start the evaporation process according to the set parameters, closely observe the evaporation rate and liquid level changes of the sample, and adjust the parameters such as rotation speed, bath temperature, and vacuum degree as needed to promote solvent evaporation and collection.