General Criteria For Pipette Tips
In 1958, the German company Eppendorf invented the first single-channel fixed-range pipette. In 1968, the Finnish Lab system (Raybo) invented a multi-channel fixed-range pipette, which greatly improved the efficiency of pipetting operations. In the early 1970s, Gilson of France introduced the first single-channel adjustable-range pipette and named it Pipetman.
Later, in the late 1970s, Gilson modified it to make the suction/discharge button and the ejection button independent of each other. In the 1980s, Danish CAPP launched a semi-sterilizable, all-metal, high-precision pipette, and Eppendorf launched the Reference series, which can sterilize the entire pipette. In 1984, the United States RAININ (Raining) began to let the world’s human body experience the thrill of electric pipettes. In 2000, the Danish cap launched the world’s only 64-channel high-precision pipette.
Classification working principle: whether the built-in piston / external piston range is adjustable: adjustable pipette / fixed pipette. Power source: manual pipette / electric pipette. Number of working channels: single-channel pipette / multi channel pipette. special purpose: pipette, continuous dispenser accuracy, and precision accuracy-system error refers to the closeness between the measurement result you get and the real value, expressed as the error.
Generally used to indicate the size of the system error. The degree to which the measured value is close to the true value is called accuracy, and the difference between the two is called error.
It is a common phenomenon in the operation when using the standard tips to remove the surface tension of the liquid, it is easy to leave a film on the inside surface of the tips. The residue of the liquid can lead to the inaccuracy and inconsistency of the fluid transfer results, and also lose some expensive samples. The low-adsorption head was developed to improve the common problem of liquid residue.
There are two kinds of the production processes of low-adsorption tips: physical polishing and chemical coating. The former uses polishing technology to treat the surface of the tips, which makes the surface of the tips very smooth to reduce the residual liquid and ensure the safety of the sample more reliably.
However, it cannot ensure the quality of low adsorption tips consistency. Whereas the chemical coating rule is to add a layer of the hydrophobic agent to the surface of the tips, there may be a risk of dissolution by introducing contamination. The safest and most reliable is the low adsorption head produced by Hawach Scientific can help you reduce liquid residue and improve sample recovery rate.
It is better to choose the inert material tips, which can ensure chemical compatibility and avoid dissolution. The most commonly used is pure PP material tips. There is an easy-to-judge criterion for the supplier’s use of the material, as long as you look at the color of the tips. The impurities in the tips made of recycled plastic are very easily visible to the naked eye, and when color is added, these impurities will be invisible, so the transparent tips are usually a better tip.
Good quality pipette tips usually have a very attractive appearance. They have smooth surfaces, no burrs, smooth cuts, even shapes, and straightness. Only do that it can ensure that the liquid is not easy to remain an accurate fluid transfer.
If the purchase is a heat-free pipette tip, the supplier should provide the certification of the batch of the product. If there is no qualified certificate, you should think twice, or choose another supplier.
These are some general criteria for the selection of pipette tips. Contact us for more suggestions on the selection of proper products.