yellow and blue pipette tips

At present, the Pipette 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 Pipette Tips are generally made of natural polypropylene, while low-cost tips are likely to use recycled polypropylene plastic (in this case, we can at most Said its main ingredient is polypropylene). In addition, most Pipette Tips will also add a small amount of additives during the manufacturing process. The common ones are: 1. Color developing materials. Commonly known as blue Pipette Tips (1000ul) and yellow Pipette Tips (200ul) in the market, the corresponding color developing material is added to polypropylene; 2, release agent. Helps the Pipette 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 is best to not add additives! However, due to the relatively high requirements on the production process, there are very few Pipette Tips on the market that do not add additives at all.
Ensuring biological cleanliness requires strict control of biological contamination during Sterile Pipette Tips production. Specifically, the following three aspects can be considered:
1. The raw materials of the Sterile Pipette Tips are pure and free of additives;
2. The production workshop of the suction head is required to reach at least 100,000 cleanliness level;
3. The entire production process of the suction head, raw material transmission, production sub-packaging, and packaging must avoid personnel contact pollution.
The above three factors ensure that the tip is not contaminated by organisms. In addition, it is necessary to carry out biological detection of the Pipette Tips after production, and the Pipette Tips of biological contamination need to provide corresponding certificates, indicating the detection data of the corresponding items. No data on the certificate or a tip without a certificate can be guaranteed to be completely free of contamination.
In fact, bagged Sterile Filter Pipette Tips are not guaranteed to be free of biological contamination. As long as the Pipette Tips come into contact with the air, there is a risk of biological contamination. For ordinary bagged Pipette Tips, the packaging bag is easily punctured, resulting in biological contamination. It is recommended to purchase boxed Pipette Tips. For more stringent experiments, use Filter Pipette Tips or pre-sterilized tips.