Pipettes are instruments that move small amounts of liquids in chemical laboratories and are widely used. Compared with glass pipettes, pipettes can greatly improve the efficiency of inspection and testing, and are favored by laboratory workers; however, pipettes have always been used and managed lightly. Most laboratory tests Adjustable pipettes are used directly by personnel without training, and most laboratory inspections are conducted on a one-year or six-monthly inspection cycle. The system error caused by the environment and operation of the pipette is extremely obvious, which may eventually lead to the deviation of the test results. So in the usual experiments, how to maintain the pipette to achieve a longer service life?
pipette
First, the maintenance of the pipette
(1) After the pipette is used, adjust the range of the pipette to the maximum value, relax the spring, and place the pipette vertically on the pipette rack;
(2) Before the pipette is sterilized at high temperature, make sure that the pipette is resistant to high temperature;
(3) Pipette calibration can be carried out by repeating the method of weighing distilled water several times in an environment of 20-25 degrees;
(4) If the liquid accidentally enters the piston chamber, the contaminants should be removed in time;
(5) Regularly clean the pipette of the pipette according to the frequency of use, it should be regularly washed with soapy water or sterilized with 60% isopropyl alcohol, then washed with double distilled water and dried;
(6) Avoid placing it at a high temperature to prevent deformation and leakage or inaccuracy;
(7) Find a professional to deal with the problem in time.
2. Matters needing attention
(1) When there is liquid in the pipette tip, do not place the pipette horizontally or upside down to prevent the liquid from flowing into the piston chamber and corroding the pipette piston;
(2) Correctly use the pipette to suction and discharge liquid to achieve high accuracy;
(3) The method of checking whether there is liquid leakage at ordinary times: after suction, stop in the liquid for 1-3 seconds to observe whether the liquid level in the tip drops; if the liquid level drops, first check whether there is any problem with the tip. If the liquid level still drops after replacing the suction head, it means that there is a problem with the piston assembly, and you should seek professional maintenance personnel for repair;
(4) Pipettes that need to be sterilized at high temperature should first check whether the pipette used is suitable for high-temperature sterilization before processing.
pipette
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