Bidirectional anti-pollution, eliminating the source of experimental errors 

This is the most crucial function of the filter cartridge suction head. The hydrophobic filter membrane (with pore diameters typically ranging from 0.22 μm) embedded within the suction head can form a physical barrier: 

Prevent cross-contamination between samples: When aspirating the samples, the filter membrane can prevent the aerosols, droplets or impurities in the samples from entering the pipette barrel, avoiding mutual contamination of different samples through the pipette chamber. This is particularly suitable for experiments that are extremely sensitive to contamination, such as PCR, nucleic acid testing, and virus cultivation. 

Prevent contamination between reagents and pipettes: The filter membrane can isolate the lubricants and residual contaminants inside the pipette, preventing them from seeping into the samples or reagents; at the same time, it can also prevent corrosive and volatile reagent gases or liquids from entering the pipette, protecting the internal precision components of the pipette from corrosion. 

Reduce liquid residue and improve pipetting accuracy 

The inner wall of the filter cartridge suction head is usually subjected to low adsorption treatments such as siliconization. Combined with the characteristics of the hydrophobic filter membrane, it can significantly reduce the phenomenon of liquid adhesion. For viscous liquids (such as serum, protein solutions) and liquids that are easily adsorbed (such as nucleic acid solutions), it can significantly reduce the residual amount after pipetting, ensuring the accuracy of the pipetting volume and the repeatability between batches, and avoiding quantitative errors caused by liquid residue. 

Adapt to demanding experimental scenarios and simplify the experimental process 

The regular filter cartridge suction head undergoes γ-ray sterilization and enzyme-free, heat-free treatment before leaving the factory. It can be directly used in aseptic experiments (such as cell inoculation, microbial cultivation) and molecular biology experiments, without the need for additional sterilization steps, thus saving experimental time. 

The polypropylene material of the filter membrane and the body of the pipette has a wide temperature tolerance range (-80℃ to 121℃), and it can withstand high-temperature and high-pressure sterilization. It is also resistant to most acids, bases, and organic solvents, and is suitable for various liquid handling operations with chemical reagents.