The pipette is an indispensable experimental instrument in biological research, and the number of its accessories tips used in the experiment is also very large. The tips on the market are basically made of polypropylene plastic (colorless and transparent plastic with high chemical inertness and wide temperature range). However, with polypropylene, the quality can vary greatly: high-quality tips are generally made of natural polypropylene, while low-cost tips are likely to be recycled polypropylene plastic (in this case, we can at most Said its main ingredient is polypropylene). In addition, most tips will also add a small amount of additives during the manufacturing process. The common ones are: 1. Color developing materials. The blue tip (1000ul) and the yellow tip (200ul) commonly known in the market are the addition of corresponding color-developing materials to polypropylene (we hope it is high-quality masterbatch, not low-cost industrial pigments); 2. Release agent. Helps the tip break away from the mold quickly after forming. Of course, the more additives, the higher the chance of undesired chemical reactions during pipetting. So it's best not to add additives! However, due to the relatively high requirements on the production process, there are very few tips on the market that do not add additives at all.
Pipette Tip Specifications
10ul (0.5-10ul white short tip / 0.5-10ul white long tip)
20ul (0.5-20ul white long tip)
100ul (10-100ul yellow)
200ul (20-200ul yellow)
1000ul (100-1000ul blue)
5000ul (1000-5000ul white)