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Classification and characteristics of laboratory centrifuges
Author: BLLA Published: 2012-12-3 Visits: 2645

的为低速离心机,低于 2 6000r/min 的为高速离心机,超越30000r/min 的是超速离心机;依据温度控制不同,能够分为冷冻离心机和普通离心机,冷冻离心机带有制冷系统,能够控制温度最低至 -20℃ ,普通离心机不带制冷系统;依据用处不同,还能够将离心机分为剖析离心机和制备离心机。 There are many types of centrifuges . Depending on the speed, they can be divided into low-speed centrifuges, high-speed centrifuges, and ultra-centrifuges. Low-speed centrifuges are less than 6000 r / min , and high-speed centrifuges are less than 2 6000 r / min . 30000r / min is an ultracentrifuge; depending on the temperature control, it can be divided into a refrigerated centrifuge and an ordinary centrifuge. The refrigerated centrifuge has a refrigeration system that can control the temperature to a minimum of -20 ° C. Ordinary centrifuges do not have a refrigeration system; According to different uses, centrifuges can also be divided into analytical centrifuges and preparation centrifuges.
Laboratory commonly used centrifuges include low-speed, high-speed centrifuges and low-speed, high-speed refrigerated centrifuges, as well as ultra-speed analysis, preparation of dual-purpose refrigerated centrifuges and other models. Among them, low-speed (including large-capacity) centrifuges and high-speed refrigerated centrifuges are the most common applications. They are essential tools used in biochemical laboratories to prepare biological macromolecules.
Ordinary centrifuge (non-freezing)
This kind of centrifuge is simple in structure, can be divided into two types of small desktop and floor type, easy to operate. 台式高速离心机最大转速可达 18000rpm The speed of low-speed centrifuge generally does not exceed 4000rpm , and the maximum speed of desktop high-speed centrifuge can reach 18000rpm .
Low-speed refrigerated centrifuge
,最大容量为 2~4L ,在实验室中最常用于大量初级分别提取生物大分子、沉淀物等。 The rotation speed does not exceed 4000 rpm , and the maximum capacity is 2 ~ 4L . It is most commonly used in the laboratory to extract biological macromolecules, sediments, etc. Its rotating head is mostly made of aluminum alloy, flat and angle centrifugal tubes. There are various models of hard glass, polyethylene hard plastic and stainless steel tubes. -20~+40℃ ,可依据离心物质所需,改换不同容量和不同型号转速的转头。 The adjustable temperature range is -20 ~ + 40 ℃ , and the rotors with different capacities and different model speeds can be changed according to the centrifugal material requirements.
③ High-speed centrifuge, high-speed refrigerated centrifuge
以上,除具有低速冷冻离心机的性能和构造外, 高速离心机所用角式转头均用钛合金和铝合金制成。 The speed can reach more than 20,000 rpm . In addition to the performance and structure of low-speed refrigerated centrifuges, the angle rotors used in high-speed centrifuges are made of titanium alloy and aluminum alloy. The centrifuge tube is made of polyethylene hard plastic with a cover. Such centrifuges are mostly used to collect microorganisms, cell debris, cells, large organelles, sulfuric acid precipitates, and immunoprecipitates.
高速离心机 Ultra- high speed centrifuge
以上,能使亚细胞器分级分别,并用于蛋白质、核酸分子量的测定等。 The rotation speed can reach more than 30,000 rpm , which can classify the subcellular organelles separately, and is used to determine the molecular weight of proteins and nucleic acids. The rotor is made of high-strength titanium alloy, which can be replaced with different capacity and different types of speed rotors according to demand. There are two types of drive motors for ultracentrifuges. One is the direct speed increase of the variable frequency motor, and the other is the speed increase through the variable speed gear box. In order to prevent the drive motor from generating heat during high-speed operation, a cooling drive motor system (air-cooled, water-cooled) is installed. In addition, the ultracentrifuge is equipped with a vacuum system
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