How to Clean a Pipette?

In order to ensure the accuracy and precision of the pipette, regular maintenance should be carried out according to the specific use situation. The pipette should be cleaned especially after removal of corrosive solvents. By simple cleaning and maintenance, the service life of the pipette can be properly extended. (Note: Be sure to remove the battery before cleaning or disinfecting.)

In this article, ATO industrial automation will introduce the method of pipette cleaning.

First, external cleaning. Depending on use, the surface of the pipette can be wiped with a damp cotton cloth soaked in 70% ethanol or 60% isopropyl alcohol to remove external dirt, then wiped again with double steaming water and allowed to dry. Check the surface of the pipette for dust or dirt, especially the suction rod part, before starting work every day.

Second, internal cleaning. External cleaning is just a simple cleaning, the most important step is the internal cleaning. Here are the steps to clean the pipette.

1. Remove the parts to be cleaned according to the steps.
2. The handle of coat and the connecting rod of suction head should be wiped with a wet cotton cloth stained with 70% ethanol or 60% isopropyl alcohol, then washed with double steaming water, and then dried.
3. In general, O-ring and piston need not be cleaned. If there are solid particles, gently wipe them off with a clean dry cotton cloth.
4. To O ring, piston grease, just coated with a thin layer.
5. Assemble the pipette according to the steps.

Third, timely disinfection. After cleaning the single channel micropipette, sterilize it at 121°C,1bar, for 20 minutes. After disinfection, let cool at room temperature for at least 2 hours before use. Some manual pipettes can be disinfected as a whole, while electric pipettes can only be disinfected at the lower end. Please disinfect according to the specific situation of the product. The whole branch is sterilized and sterilized under ultraviolet light without disassembly.

The following points also need to be noted:

• If not in use, set the range of the pipette to the maximum scale so that the spring is relaxed to protect it.
• It is best to clean the petting gun regularly, which can be washed with soapy water or 60% isopropyl alcohol, and then cleaned with distilled water and allowed to dry naturally.
• Before pasteurizing, make sure the pipette is heat resistant.
• Calibration can be carried out at 20 to 25 degrees by repeating the scale several times to measure distilled water.
• Use to check whether there is leakage phenomenon. The method is to absorb the liquid and then hang it vertically for a few seconds to see if the liquid level drops.