The tip that can be attached to the pipette can indeed form a pipetting system with the pipette to realize the pipetting function, but is this reliable? A question mark is required here. Answering this question requires data to speak for itself.

1. You may wish to test the performance after matching the pipette with the tip. After rinsing the tip, perform several repeated additions, weigh each addition, and record the reading.

2. Calculate the accuracy and precision of the pipetting operation after converting the density of the test liquid into volume.

3. What we want to choose is a tip with good accuracy. If the matching accuracy of the pipette and tip is not good, it means that the tightness of the tip and the pipette cannot be guaranteed, making the results of each operation unreproducible.

So what should a good suction head have at least?

A good tip depends on concentricity, taper, and the most important point is adsorption;

1. Let’s talk about the taper first: if it is better, the match with the gun will be very good, and the suction will be more accurate;

2. Concentricity: Concentricity refers to whether the circle at the suction nozzle of the suction head and the connection between the suction head and the pipette appear to be the same center of the circle. If it is not the same center, it means that the concentricity is not good;

3. The most important one is our adsorption: the adsorption is related to the material of the tip. If the material of the tip is not good, it will affect the accuracy of pipetting, resulting in a large amount of liquid retention or simply hanging. wall, causing pipetting errors;

Therefore, everyone should pay special attention to the above three points when choosing a suction head