Pipette and pipette are necessary glassware commonly used in laboratory. Now the name of pipette has gradually disappeared. It has been replaced by a multi-scale pipette. However, for the sake of difference, this paper is still called a pipette. Many people say that the pipette with scale is called ... read more
The measuring flask is mainly used to accurately prepare a certain concentration of solution.It is a long neck, pear-shaped flat bottom glass bottle with a grinding stopper.The bottleneck is marked, and when the liquid in the bottle reaches the mark at the specified temperature, its volume is the nu... read more
After the sample test, the sample tube needs to be cleaned in time, and it should be cleaned immediately after pouring out the waste liquid, because once the solvent volatilizes and the solid adheres, it is difficult to wash off, and the longer the time is, the harder it is to wash. The washing meth... read more
Maintenance precautions Calibration can be carried out by weighing distilled water several times in 20-25 degree environment. The liquid gun with liquid suction shall not be placed horizontally, and the liquid in the gun head is easy to contaminate the gun interior, which may cause the spring rust o... read more
There are many kinds of centrifuges, which are usually classified from the following aspects: (1) According to the speed, it can be divided into: low-speed centrifuge, high-speed centrifuge and ultra-high-speed centrifuge; (2) According to the requirements of temperature, it can be divided into: ord... read more
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