Centrifuges can be divided into high-speed centrifuges and low-speed centrifuges in accordance with the different speed ranges, the difference between these two kinds of centrifuges is mainly embodied in two aspects:
1, the speed is different
Low-speed centrifuges have a slower rotational speed, generally below 8000rpm, most of them are 3000~5000rpm; high-speed centrifuges are different, the speed of the centrifuge is slightly higher than the experimental demand. 5000rpm; high-speed centrifuge is a higher speed centrifuge, the general speed of 10,000rpm or more, and some even up to 30,000rpm.
2, the scope of application is different
High-speed centrifuges are routine laboratory centrifuges, is the medicine, pharmacy, biology, chemistry, agricultural sciences, food and environmental protection and other scientific research and production departments to use an important Instruments and equipment, widely used in a variety of drugs, biological products, such as blood, cells, proteins, enzymes, nucleic acids, viruses, hormones and so on.
Low-speed centrifuge is a laboratory for centrifugal precipitation of conventional instruments, mainly used in health care, food, environmental protection, scientific research, teaching and other fields.
Two, centrifuge speed the greater the better
Not necessarily.
High-speed centrifuge speed is faster, but relatively speaking, the price is also higher, generally mainly used in the field of centrifugal requirements are higher, if it is an ordinary experiment, teaching and other areas, with high-speed centrifuge is too much waste. Therefore, in the selection of centrifuges, not the higher the better, but to pay attention to the needs of the experiment to choose the appropriate speed of the product.
Three, centrifuge how to choose the right speed of the product
In the choice of centrifuge, centrifuge speed is an important reference factor, then the centrifuge to choose how much speed is good?
The selection of centrifuge speed is generally based on the experimental needs, such as room temperature, micro, fast centrifugation with ordinary low-speed centrifuge can be; if it is to do a small amount of plasmid DNA extraction, cDNA extraction experiments, protein extraction, and other experiments, the selection of high-speed centrifuge.
Additionally, it should be noted that the maximum speed of a centrifuge refers to the speed of the unloaded case, according to the different types of rotors, the size of the sample quality, the maximum speed will be different. When the maximum speed of a centrifuge is 10,000rpm, it means that its no-load speed is 10,000rpm, but after adding samples, the speed will definitely be lower than 10,000rpm; and for the maintenance of the equipment, using the maximum speed for a long period of time will cause more damage to the machine. Therefore, if the target speed is 10000rpm, it is recommended to purchase a centrifuge with a maximum speed higher than 10000rpm.
There is also, in the choice of low-speed centrifuge and high-speed centrifuge should pay attention to: high-speed should not do low-speed, if you want to have both high and low-speed centrifuges, you can choose the general-purpose centrifuge.