Dry bath nitrogen blowerThe usage method mainly includes the following steps to ensure standardized operation, safety and efficiency:

1、 Preparation before use

Check equipment:

Confirm that all components of the nitrogen blower (such as gas needle, heating module, gas flow control valve, etc.) are intact and undamaged.

Check if the power cord is well grounded to avoid the risk of electrical leakage.

Prepare samples:

Transfer the sample to be concentrated to a suitable size test tube (such as 1.5mL, 2mL, or 10-26mm diameter test tube).

Ensure that the sample size does not exceed 2/3 of the test tube capacity to prevent overflow during boiling.

Connect nitrogen source:

Connect the nitrogen cylinder or nitrogen generator to the inlet of the nitrogen blower through a pipeline.

Adjust the nitrogen pressure to an appropriate range (usually 0.1-0.2 MPa) to avoid excessive pressure causing gas needle blockage or sample splashing.

Install test tube:

Select the appropriate heating module based on the specifications of the test tube (such as 12 holes, 24 holes, etc.).

Insert the test tube vertically into the hole of the heating module, ensuring that the bottom of the test tube is in full contact with the heating block.

2、 Operation steps

Set temperature:

Turn on the power switch and set the target temperature (such as 50-150 ℃, adjusted according to the boiling point of the solvent) through the digital display screen or knob.

Wait for the heating module to reach the set temperature (some models have real-time temperature display function).

Adjust gas flow rate:

Open the nitrogen valve and adjust the flow rate of each needle one by one (usually 0-15L/min).

Observe the formation of bubbles on the surface of the sample to ensure that nitrogen is evenly blown and does not cause severe boiling of the sample.

Start concentration:

After confirming that all parameter settings are complete, start the nitrogen blower to begin concentration.

Regularly observe the sample status during the concentration process to avoid excessive evaporation that may cause sample loss or drying up.

End concentration:

When the sample is concentrated to the required volume (such as below 1mL), close the nitrogen valve.

Adjust the temperature of the heating module to * low or turn off the heating function, and remove the test tube after the equipment cools down.

3、 Key precautions

Security protection:

Wear experimental gloves and goggles during operation to prevent solvent splashing or high-temperature burns.

Use a nitrogen blower in the fume hood to avoid inhaling volatile organic solvents.

Ignition point limit:

Substances with a flash point below 100 ℃ (such as certain ethers and ketones) are not suitable for useDry bath nitrogen blowerTo prevent spontaneous combustion.

Heating stability:

During the concentration process, avoid moving the nitrogen blower or test tube to prevent temperature fluctuations in the heating module or tilting of the test tube.

Gas flow control:

Excessive nitrogen flow may cause sample splashing, while insufficient flow may prolong concentration time and require adjustment based on solvent properties.

Test tube selection

Use high temperature resistant and chemically inert test tubes (such as glass or polypropylene materials) to avoid reacting with solvents.

Cleaning and maintenance:

After concentration, clean the heating module and gas needle with deionized water or organic solvents to prevent cross contamination.

Regularly check whether the nitrogen pipeline leaks to ensure the normal operation of the equipment.