1. Choose a suitable pipette: Choose a suitable pipette model according to the volume of liquid to be transferred.
2. Set the volume: Set the sampling volume of the pipette as needed.
3. Sampling: Immerse the pipette head in the liquid sample and slowly draw the required volume of liquid.
4. Transfer liquid: Transfer the sampled liquid to the target container, ensuring smooth operation and avoiding bubbles or splashes.
5. Cleaning: Clean the pipette in time after use to avoid liquid residue and cross contamination.