The pipette is an indispensable experimental instrument in biological research, and the number of its accessory Pipette tip used in the experiment is also very large. Pipette tips on the market are basically made of polypropylene plastic (colorless and transparent plastic with high chemical inertness and a wide temperature range).

However, for the same polypropylene, the quality of the pipette tip will also vary greatly: high-quality pipette tips are generally made of natural polypropylene, while low-cost tips are likely to use recycled polypropylene plastic (in this case, we It can be said that its main ingredient is polypropylene).

In addition, a small amount of additives are added to most pipette tips during the manufacturing process. The common ones are: 1. Color-developing materials. Commonly known as blue tip (1000ul) and yellow tip (200ul) in the market, the corresponding color-developing materials are added to polypropylene (we hope it is high-quality masterbatch, not cheap industrial pigments); 2. Release agent. Help the Pipette tip to be quickly separated from the mold after forming. Of course, the more additives, the higher the probability of undesirable chemical reactions during pipetting. So it is best not to add additives! However, due to the relatively high requirements for the pipette tip production process, the tip with no additives is rare in the market.