Centrifuge tube is a common experimental consumable in the laboratory, which is mainly used in conjunction with centrifuges. Put the test liquid in it and centrifuge it.

According to their different materials, they can be generally divided into plastic and glass. Plastic centrifuge tubes are widely used, and can also be divided into PP, PC, PS, etc. According to different needs, manufacturers will choose different plastic materials to make them.

According to its size, it can be divided into 1.5mL, 2mL, 5mL, 10mL, 15mL, 50mL, etc. The domestic centrifuge tubes are generally of these specifications, and 10mL and 50mL are widely used. If your centrifuge is equipped with 30mL or other specifications of centrifuge tubes, you should consider the imported ones. In addition, the centrifuge tube has a round bottom and a sharp bottom, as well as a screw cap and a plug cap. The centrifuge tube with screw cap has a fine scale, and the plug cap has only one overall capacity mark.

The centrifuge tubes commonly used in the laboratory are plastic and glass. Generally, plastic tubes are used more, because glass centrifuge tubes cannot be used in high-speed or overspeed centrifuges. The plastic centrifuge tubes are made of PP, PC and PE. PP pipe performance is relatively good. The plastic centrifuge tube is transparent or translucent, so you can directly see the centrifugation of the sample, but it is relatively easy to deform, and has poor corrosion resistance to organic solvents, so its service life is short. Therefore, laboratories often purchase centrifuge tubes. Now we will introduce each material separately.

PP (polypropylene): translucent, chemical and temperature stability is good, but it will become brittle at low temperature, so it should not be below 4 ℃ during centrifugation.

PC (polycarbonate): It has good transparency and hardness, and can be sterilized at high temperature, but it is not resistant to strong acids and alkalis and some organic solvents such as alcohol. It is mainly used for ultrahigh speed centrifugation above 50000 rpm.

PE (polyethylene): opaque. It does not react with acetone, acetic acid, hydrochloric acid, etc., is relatively stable, and tends to become soft at high temperatures.

PA (polyamide): This material is a polymer made of PP and PE. It is translucent, has very stable chemical properties, and is not resistant to high temperatures.

PS (polystyrene): transparent, high hardness, stable to most aqueous solutions, but can be corroded by a variety of organic substances. It is mostly used for low-speed centrifugation, and is generally disposable.

PF (polyfluoroethylene): translucent, can be used at low temperature. If the experimental environment is - 100 ℃ - 140 ℃, the centrifuge tube made of this material can be used.

CAB (butyl acetate cellulose): transparent, can be used for the gradient determination of dilute acid, alkali, salt, alcohol and sucrose.