Commonly used centrifuge tubes in laboratories include plastic and glass. Plastic is generally used more often because glass centrifuge tubes cannot be used in high-speed or ultra-speed centrifuges. Plastic centrifuge tubes are made of PP (polypropylene), PC (polycarbonate), PE (polyethylene) and other materials. The following is an introduction to the various materials of plastic centrifuge tubes. PP (polypropylene): translucent, with good chemical and temperature stability, but it will become brittle at low temperatures, so do not centrifuge below 4°C. PC (polycarbonate): It has good transparency and high hardness, and can be sterilized at high temperatures, but it is not resistant to strong acids and alkalis and some organic solvents such as alcohol. Mainly used for ultra-high-speed centrifugation above 50,000 rpm. PE (Polyethylene): Opaque. It does not react with acetone, acetic acid, hydrochloric acid, etc., is relatively stable, and easily softens at high temperatures. PA (polyamide): This material is a polymer made of PP and PE. It is translucent and has very stable chemical properties, but it is not resistant to high temperatures. PS (polystyrene): transparent, hard, stable to most aqueous solutions, but will be corroded by a variety of organic substances, mostly used for low-speed centrifugation, and generally for one-time use. PF (polyfluoride): translucent and can be used at low temperatures. If the experimental environment is -100℃-140℃, you can use centrifuge tubes made of this material. CAB (cellulose butyl acetate): transparent, can be used for gradient determination of dilute acids, alkalis, salts, alcohol, and sucrose. The advantages of plastic centrifuge tubes are that they are transparent or translucent and have low hardness, and the gradient can be taken out by puncture. The disadvantages are that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life. Plastic centrifuge tubes can be equipped with a tube cover. Its function is to prevent the sample from leaking. It is especially important to prevent the sample from leaking when used for radioactive or highly corrosive samples. The tube cover also has a function of preventing the sample from leaking. Evaporate and support the centrifuge tube to prevent deformation of the centrifuge tube. When selecting this point, you should also pay attention to check whether the tube cap is tight and whether it can be capped tightly during the test to prevent leakage when inverted.
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