What is the purpose of a pipetting bulb?

The purpose of a pipetting bulb is to facilitate the process of sucking liquid into a pipette. When using a pipette, it is crucial to draw liquid accurately and safely, and a pipetting bulb is designed specifically for this task. The bulb creates a vacuum that allows for controlled suction, enabling precision in volume measurement and reducing the risk of contamination that can occur when using a mouth pipetting technique.

Using a pipetting bulb enhances user safety and improves the accuracy of laboratory procedures. This is particularly important in biotechnology applications, where precision in handling liquids is essential for the success of experiments and processes. The other options do not align with the primary function of a pipetting bulb, as it does not involve heating, dispersing gases, or filtering particulates, but rather serves solely to draw liquid into the pipette efficiently and safely.