Pipettes are essential laboratory instruments for biological research, and their accessory tips are used in huge numbers in experiments. Pipette tips on the market are basically made of polypropylene plastic (a colorless, transparent plastic that is chemically inert and has a wide temperature range). However, the quality of polypropylene can vary greatly: high-quality tips are generally made from natural polypropylene, while cheaper tips are likely to be made from recycled polypropylene plastics (in which case, at best, we can say that the main ingredient is polypropylene). In addition to this, most tips are manufactured with a small number of additives, commonly known as: 1, color-developing materials. The blue (1000ul) and yellow (200ul) tips, as they are commonly known on the market, are made from polypropylene with the appropriate color-developing material (we expect high quality masterbatches, not cheap industrial pigments); 2. Release agents. Helps the tip to quickly detach from the mold after forming. Of course, the more additives there are, the higher the probability of unwanted chemical reactions during pipetting. So it's best to have no additives! However, due to the high demands placed on the production process, pipette tips with no additives at all are rare on the market...?
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)