What is commonly used in the laboratory is the electric centrifuge. The electric centrifuge rotates at a fast speed. Pay attention to safety. In particular, prevent the centrifuge from moving while working due to imbalance or aging of the test tube pad during the operation of the centrifuge. When the centrifuge tube is broken due to vibration, or the centrifuge tube is broken due to the drop or the lid is not covered, the glass fragments rotate and fly out, causing an accident. Therefore, when using the centrifuge, you must pay attention to the following operations.
(1) Cotton or test tube pads should be placed at the bottom of the centrifuge casing.
(2) If the electric centrifuge is noisy or the body vibrates, the power supply should be cut off immediately, and the fault should be eliminated immediately.
(3) The centrifuge tube must be symmetrically placed in the casing to prevent the machine from vibrating. If there is only one sample tube, the other should be replaced with water of equal quality.
(4) When starting the centrifuge, cover the top cover of the centrifuge before starting slowly.
(5) After the separation, turn off the centrifuge first. After the centrifuge stops rotating, you can open the centrifuge cover and take out the sample. Do not use external force to force it to stop.
(6) The centrifugation time is generally 1 to 2 minutes. During this period, the experimenter is not allowed to leave to do other things.
In enterprises or academic research institutions, low-speed experimental centrifuges with a rotation speed of about 3000 rpm have been more commonly used, such as the 315 filter + sedimentation integrated experimental centrifuge, the 100 experimental centrifuge, and the 200 experimental centrifuge. These centrifuges have reasonable design, low center of gravity, safety and stability, and have been more widely used in the preliminary sample analysis in the chemical, food, medical and other fields.
