The suction, like the bullet of a gun, is an indispensable accessory to the pipette. In theory, the quality of the suction head also has a great impact on the accuracy of the pipette, which is no less important than the pipette. However, the position of suction heads in China is very awkward - most users would rather pay a high price for a high-quality pipette than use a better one (this phenomenon is very common in universities, research institutes, hospitals and other government-backed institutions). Therefore, the credibility of the data produced in this case will inevitably need to be discounted - of course, this is also Chinese characteristics.

The material. At present, the suction heads on the market are basically made of polypropylene plastics (colorless transparent plastics with high chemical inertness and a wide temperature range). However, the same is polypropylene, the quality difference will be very large: high-quality suction heads are generally made of natural polypropylene, and cheap suction heads are likely to be recycled polypropylene plastic (in this case, we can say that the main component is polypropylene). In addition, most suction heads in the manufacturing process will also add a small amount of additives, common are: 1, color material. In the market, commonly known as the blue gun head (1000ul) and the yellow gun head (200ul), is to add the corresponding color material in polypropylene (we hope that it is a high-quality color masterbatch, rather than cheap industrial pigments); 2. Release agent. Helps the suction head quickly detach from the mold after forming. Of course, the more additives, the higher the probability of unwanted chemical reactions occurring during the pipetting process. So *** is no additives! However, due to the relatively high requirements for the production process, the suction head without additives is rare in the market.