Pay attention to the following points in the daily work of the laboratory: 1. Before starting the work, the gas master valve, water valve and electric gate should be known. When leaving the laboratory, be sure to check the room once. The water, electricity, and gas switches should be closed and the doors and windows locked. 2. When opening the pressure cylinder, the operator must stand on the side of the gas outlet of the cylinder, the cylinder should stand upright, and then slowly open the valve. The gas must be decompressed via a pressure reducing valve and must not be deflated directly. When switching high-pressure gas cylinder valve, use hand or special wrench, do not use tools such as chisel and pliers to prevent damage to the valve. Use a gas cylinder with a flammable, explosive, and toxic gas to ensure good ventilation and ventilation. Special personnel are responsible for use and maintenance. The gas in the gas cylinder must not be used up, and the residual pressure must be left. The residual pressure should generally be about 2kg·cm-2, at least not less than 0.5kg·cm-2. 3. When using electrical equipment (for example, oven, constant temperature water bath, centrifuge, electric furnace, etc.), be sure to prevent electric shock; never switch the electric switch and electrical switch with wet hands or when looking at the eyes. Before using, first check the electrical equipment for leaks with the test pencil. If the instrument has leakage, it cannot be used. 4. Special care should be taken when using combustibles, especially flammable materials (eg acetone, ethanol, benzene, sodium metal, etc.). Don't put it on the table a lot, not near the flame. The flammable liquid can be dumped in large quantities only when it is kept away from the fire or after the flame has been extinguished. Low-boiling organic solvents are not allowed to be heated directly on fire, but can only be heated or distilled on a water bath using a reflux condenser. 5. Use concentrated acid and concentrated alkali, and must be operated with great care to prevent spillage. When using a pipette to measure these reagents, a rubber ball must be used and it must not be sucked by the mouth. If it is accidentally splashed on the test bench or on the ground, it must be cleaned with a damp cloth in time. If it touches the skin, it should be treated immediately. 6. If a considerable amount of flammable liquid is accidentally poured out, it should be treated as follows: (1) Immediately shut down all fire sources and electric heaters in the room. (2) Close the door and open the small window and window. (3) Wipe the spilled liquid with a towel or a rag and screw the liquid into a large container, then pour it into a stoppered glass bottle. 7. Residues of flammable and explosive substances (eg, sodium metal, white phosphorus, match heads) shall not be poured into a dirt bucket or sink and shall be collected in a designated container. 8. Waste liquid, especially strong acid and strong alkali, can not be poured directly into the Water Tank. It should be diluted first, then poured into the water tank, and then rinse the sink and sewer with a lot of tap water. 9. Toxic substances should be collected after the examination and approval procedures are carried out according to the regulations of the laboratory. They should be strictly operated during use and properly disposed of after use. 10. When operating in an oil bath, be careful to heat it and keep measuring it with a thermometer. Do not let the temperature exceed the burning temperature of the oil. summary The above is the precautions for the daily work of the laboratory! Xiao Liu could not help but remind again: pay attention to fire and electricity, acid and alkali. After all, ensuring laboratory safety is everyone's responsibility! Blow Up Mattress,Inflatable Air Mattress,Camper Air Mattress,Inflatable bed Danyang Doing Articles Co.,Ltd , https://www.dydoing.com
March 15, 2023