How To Choose Centrifuge Tubes
The centrifuge tube is a tubular sample container with a sealing cover or a flip cap. It uses centrifugal technology to generate a strong centrifugal force when the object is rotated at a high speed, so that the suspended particles placed in the rotating body will settle or float, so that a certain Some particles are concentrated or separated from other particles.
According to the size of the centrifuge tube, it is usually divided into the following specifications: 1.5mL, 2mL, 5mL, 10mL, 15mL, 50mL, etc. The domestic centrifuge tubes generally have these specifications, and the most used ones are 10mL and 50mL. If your centrifuge is equipped with 30mL or other specifications of centrifuge tubes, you may have to consider importing them. In addition, centrifuge tubes also have round bottoms and sharp bottoms, as well as screw caps and plug caps. Centrifuge tubes with screw caps have finer scales, and capped tubes usually only have an overall volume indication.
Material of plastic centrifuge tubes:
Then according to the different materials of the centrifuge tube, it can be divided into plastic and glass in general. There are many kinds of materials for plastic centrifuge tubes, such as PP, PC, PS, etc. to make. Generally speaking, plastic centrifuge tubes are used more in laboratories, because glass centrifuge tubes cannot be used in high-speed or ultracentrifuges. The following is a brief introduction to the common materials and properties of plastic centrifuge tubes. The actual selection should be based on the tolerance relationship between the centrifugal material and the centrifuge tube material and the rotational speed of the centrifuge tube. Comprehensive selection:
PP (polypropylene): Translucent, good chemical and temperature stability, but will become brittle at low temperature, so do not be below 4 ℃ during centrifugation.
PC (polycarbonate): good transparency, high hardness, can be sterilized at high temperature, but not resistant to strong acid and alkali and some organic solvents such as alcohol. Mainly used for ultracentrifugation above 50,000 rpm.
PE (Polyethylene): Opaque. It does not react with acetone, acetic acid, hydrochloric acid, etc., and is relatively stable, and it is easy to become soft at high temperature.
PA (Polyamide): This material is a polymer of PP and PE, translucent, very chemically stable, but not resistant to high temperatures.
PS (polystyrene): transparent, high hardness, stable to most aqueous solutions, but will be corroded by various organic substances, mostly used for low-speed centrifugation, and generally one-time use.
PF (polyfluorine): translucent, can be used at low temperature, if it is an experimental environment at -100℃-140℃, centrifuge tubes of this material can be used.
CAB (Cellulose Acetate Butyl): Transparent, can be used for the gradient determination of dilute acids, alkalis, salts, as well as alcohol and sucrose.
The advantages of plastic centrifuge tubes are that they are transparent or translucent, have low hardness, and can be used to remove gradients by puncture. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life. The plastic centrifuge tube can be equipped with a tube cover, which is used to prevent the leakage of the sample, especially when it is used for radioactive or highly corrosive samples. It is very important to prevent the leakage of the sample; Evaporate 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 no leakage when inverted.
The advatanges of BKMAM centrifuge tube:
Clear Graduation
PP tube ,PE cap
Sterile, Dnase&Rnase free and pyrogen-free
Complete specifications to meet different experimental needs
