Release Date：2022-11-12 15:42:42 Popularity：
The pipette tips produced by the GST pipette tip automatic plug box packing machine are also called pipette tips, TIP tips, and pipette nozzles. Pipette tips are an indispensable tool in the hands of experimenters. An adapted pipette tip can not only reduce the loss of the pipette, but also improve the accuracy of the experimental results.
Tips are disposable consumables and can be in direct contact with liquid samples. It will not only affect the accuracy of pipetting results, but also the dissolution and foreign biological pollutants will directly affect the analysis results. So how to choose the right suction head?
1. Low adsorption
When the low adsorption tip pipettes the liquid with low surface tension, the liquid can slide off the inner surface of the tip very easily, leaving very little residual liquid in the tip. This low adsorption property is beneficial for applications including: PCR, real-time PCR, cloning, SDS-PAGE, and other nucleic acid or protein analysis methods.
2. Filter element
Anti-pollution, the filter element is a consumable designed to avoid cross-contamination, and is often used in experiments such as molecular biology, cytology, and virology. Helps reduce the possibility of smog formation and prevents aerosol pollution. For example: bacteria, viruses, volatile, corrosive or viscous chemicals.
Anti-suckback, tip with filter element, when pipetting the sample, if the force is improper, it can prevent the liquid from entering the inside of the pipette, thereby protecting the parts of the pipette from contamination and corrosion. Therefore, Filtered tips are also an important tool for pipetting volatile and corrosive samples.
3. No DNase and RNase, no pyrogen
DNase and RNase are just two kinds of enzymes that can degrade DNA and RNA. "Pyrogen" mainly refers to bacterial pyrogens, which are metabolites of certain bacteria, bacterial corpses and endotoxins.
No DNase and RNase≠sterility, DNase and RNase are just two kinds of enzymes that can degrade DNA and RNA! But fungi, bacteria, etc. are coated with cell membrane capsid proteins! They cannot be degraded! So they cannot be said to be sterile! High temperature sterilization Sterilized tips cannot completely guarantee the absence of biological contamination, and steps such as gamma ray treatment are required to ensure that there is no biological contamination.
4. Sterilization
Sterilized tips are usually boxed to prevent contamination. The concept of sterility means that there is no contamination from other microorganisms, such as fungi, bacteria, etc., as well as the most difficult spores to get out.
5. Length
The length, suction heads of different specifications have different lengths and calibers, but some suction heads of the same specification have exactly the same length.
The extended suction head can be directly inserted into the bottom of the tube to absorb liquid, and there is no need to incline to absorb liquid. The biggest disadvantage of inclining liquid absorption is the error. The larger the inclination angle, the more suction, the greater the error. The extended suction head, after being inserted into the bottom of the tube, does not touch the tube wall, thus avoiding cross-contamination. Lengthen the tip, and the space is often larger. When sucking back by mistake, it can prevent the liquid column from quickly rushing up and contaminating the cone of the pipette.
6. Material appearance
Use pure PP material without plasticizer and mold release agent, otherwise soluble matter will affect the test results; the inner wall must be smooth and free of flow marks, and the tip must have no gaps and burrs, otherwise it will lead to inaccurate drainage;
7. Conductivity
Conductivity, most standard pipette tips do not require conductivity, but tips used in liquid handling in drug testing systems require conductivity. Conductive tips are usually black throughout. Conductive tips are specially designed for automated workstations and can be used for genomics, proteomics, cytomics, immunoassays, metabolomics, biopharmaceutical R&D and other commonly used high-throughput pipetting needs.
8. Packaging specifications
Bulk: basically not sterile, non-sensitive application, 500 tubes/bag or 1000 tubes/bag, the price is low.
Packed in boxes: Aseptic ones are packed in boxes, 96 tubes/box or 100 tubes/box, the price is relatively high.
