How to pipette correctly?

Among the many operations in the chemistry laboratory, pipetting is a basic and crucial skill. It is not only related to the accuracy of experimental results, but also directly affects the safety and repeatability of experiments. This article will introduce in detail how to pipette correctly to help you improve the efficiency and accuracy of your experiment.

In the first step, choosing the right pipette is key. Choose an appropriate pipette based on the volume range that needs to be pipetted, usually divided into two types: pneumatic and manual. Air-operated pipettes are suitable for pipetting large volumes of liquids, while manual pipettes are suitable for pipetting small volumes of liquids.

Preparation is also very important. Before pipetting, be sure to clean and dry the dual-channel pipette to avoid liquid residue. At the same time, prepare pipette tips of various specifications to ensure the accuracy and precision of pipetting.

Next, calibrating the pipette is also an essential step. Use a professional pipetting calibration instrument and perform the calibration correctly according to the instructions to ensure the accuracy and stability of the pipette.

When performing actual pipetting operations, pay attention to the following points: 1. When absorbing liquid, the pipette head should be completely immersed in the liquid to avoid the generation of bubbles; 2. When adding sample liquid, it should be dripped slowly along the wall of the container. Add to avoid droplets remaining on the pipette head; 3. When discharging liquid, gently insert the pipette head into the target container, and then push slowly to avoid splashing.

Finally, after the operation is completed, remember to clean the pipette and store it correctly to ensure accuracy and stability the next time you use it.

In short, mastering correct pipetting techniques is crucial to experimental work. By selecting the appropriate pipette, preparing the pipette, calibrating the pipette, and paying attention to detailed operations, experimental efficiency and accuracy of results can be effectively improved, thereby providing strong support for scientific research. We hope that the above content can help you better master the correct pipetting techniques and improve the level of experiments and the quality of results.