The advantage of plastic centrifuge tubes is that they are transparent or translucent, their hardness is small, and samples can be taken out by puncture. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life. Today, let’s briefly talk about what can be divided into centrifuge tubes according to materials?
1. Plastic centrifuge tube
The advantage of plastic centrifuge tubes is that they are transparent or translucent, their hardness is small, and samples can be taken out by puncture. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life.
Plastic centrifuge tubes have caps, which are used to prevent the leakage of samples, especially when used for radioactive or highly corrosive samples. And support the centrifuge tube to prevent deformation of the centrifuge tube. When choosing this point, you should also pay attention to check whether the tube cover is tight, and whether it can be tightly covered during the test, so as to achieve the inversion without leakage;
We all know that in plastic centrifuge tubes, the commonly used materials are polyethylene (PE), polycarbonate (PC), polypropylene (PP), etc. Among them, polypropylene PP tubes have relatively good performance. Therefore, we are choosing plastic centrifuge tubes. Whenever possible, consider polypropylene plastic centrifuge tubes.
Plastic centrifuge tubes are generally disposable laboratory instruments, and repeated use is not recommended. In order to save money, the PP centrifuge tube can be reused according to the situation, but it needs to be thoroughly sterilized by high temperature and high pressure to ensure the scientificity of the experimental results. Centrifuge tubes made of PE material cannot be sterilized at high temperature and high pressure.
The centrifugal force or recommended rotational speed that the product can withstand is generally indicated in the packaging or instructions of the plastic centrifuge tube. In order to ensure the safety of the experiment and the reliable results, the centrifuge tube that matches the rotational speed requirements of the experiment should be selected.
2. Glass centrifuge tube
When using glass tubes, the centrifugal force should not be too large, and a rubber pad should be used to prevent the tubes from breaking. Glass tubes are generally not used in high-speed centrifuges. The lid of the centrifuge tube is not closed well enough, and the liquid cannot be filled up (for high-speed centrifuges and angle rotors) to prevent overflow and loss of balance. The consequence of spillage is to contaminate the rotor and centrifugal chamber, affecting the normal operation of the inductor. During ultracentrifugation, the centrifuge tube must be filled with liquid, because high vacuum is required for ultracentrifugation.
3. Steel centrifuge tube
The steel centrifuge tube has high strength, no deformation, heat resistance, frost resistance and chemical corrosion resistance. Its application is also quite extensive, but it should also avoid contact with strong corrosive chemicals, such as strong acid and alkali. Try to avoid corrosion from these chemicals.
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