Centrifuge tube selection requirements
1、Volume: determined by the volume of the sample. Note that in some applications (e.g., high-speed centrifugation) tubes must be filled to capacity.
2、Shape: For sediment collection, centrifuge tubes with conical bottoms are preferred, while round-bottomed tubes are more useful for density gradient centrifugation.
3, Z large relative centrifugal force: detailed information provided by the manufacturer.
4, corrosion resistance: glass tubes are inert, polycarbonate tubes are sensitive to organic solvents (such as ethanol, acetone), while polypropylene has better corrosion resistance. Detailed information can refer to the manufacturer's instructions.
5, sterilization: disposable plastic centrifuge tubes are usually sterilized at the factory. Glass and polypropylene tubes can be sterilized repeatedly. Repeated autoclaving may cause polycarbonate chipping or deformation.
Transparency: Glass and polycarbonate tubes are transparent, while polypropylene tubes are translucent.
7, can be pierced: if you want to collect samples by piercing the wall of the tube, cellulose acetate tube and polypropylene tube is easy to pierce with a syringe needle.
8, tube cap: most angular and vertical tube rotor requires centrifuge tube with a cap to prevent the sample from leaking out during use and to support the tube during centrifugation to prevent it from being deformed during centrifugation. For radioactive samples, even low-speed centrifugation must be covered with a cap, and the use of centrifugation tubes and the use of matching caps.
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