Laboratory operation precautions
1. It is forbidden to eat and drink in the laboratory. Someone once ate something while watching the microscope and drank the reagents nearby. Although it was urgent to wash the stomach, it was inevitably disabled. It is also forbidden to use the reagents in the laboratory as “foods and additives”, such as NaCl or distilled water because you do not know the purity and impurities in NaCl, the same is true for distilled water, remember!
2. Brush the bottle, be sure to brush both inside and outside, save you later and then take the time to find out if the dirty thing is inside or outside.
3. The lab can’t wear leather shoes with nails because it will rub against electricity.
4. When using more samples or samples that are used later, be sure to label them. Even if your memory is too good, you should post them. Otherwise, if you forget, you may spend time thinking about what it is. ….
5. After any experiment fails, don’t rush to dump the reaction. Maybe after a while, you will regret the impulse.
6. To do experiments, you must record the data in real time, and if you just write or even tamper with the data, it will bring you trouble.
7. It is best to wear a glass lens eye to prevent the solvent or corrosive substances from splashing into the eyes. The resin lens is more susceptible to corrosion.
8. Before the experiment, you must first think about what you should do. It is not an empty talk to do a good job of experiment preparation. Otherwise, it is easy to make mistakes and even accidents.
9. Pay attention to rest and avoid fatigue at work!
10. The heated test tube must not be heated centrally, and the test tube mouth must not be aimed at the person to prevent the liquid from overheating and ejecting.
11. It is strictly forbidden to heat all organic solvents in the flask, which is quite dangerous. If the solvent is exposed or the bottom of the bottle is broken, the operator next to it is very dangerous.
12. Vacuum distillation is a rather dangerous operation. Remember, when decompressing under reduced pressure, people should try not to get close to the reaction device, so be sure to wear protective equipment such as goggles. Because vacuum distillation depends on the quality of the equipment, the small crucible of the glass container will be subjected to external atmospheric pressure during decompression. If there is a crack, it will cause the entire glassware to burst and hurt the experimenter.
13. High-risk solvents such as chloroform, carbon tetrachloride, methanol, and benzene, or strong irritating gases such as hydrochloric acid, pay attention to exhaust ventilation when using.
14. It is forbidden to use alkaline substances in the acid burette. Otherwise, it will corrode the frosted glass and the wall to prevent leakage and volume inaccuracy. The alkaline burette is strictly prohibited to use strong oxidizing reagents such as potassium permanganate and potassium dichromate. If it is a neutral substance, try to use a basic burette (the basic burette is easy to handle).
15. Oxidizing acids such as sulfuric acid and nitric acid should be used safely. If you accidentally drip on your body, wash it with water and then wash it with sodium bicarbonate. Do not ignore it because of the low concentration. Because the concentration of sulfuric acid increases as the water evaporates, the original dilute sulfuric acid becomes concentrated sulfuric acid.
16. Keep your lab bench clean forever, not only for good results but also for your own mood.
All the operations of the experiment are actually a process of accumulation. A very simple operation, such as the end point titration of acid-base titration, the mastery of 1/2 drop or 1/4 drop, can often see the basic quality of a person’s chemistry. If you are involved in testing, your basic experimental skills are very important.
In case you require any information or have doubts, feel free to reach out to WUBOLAB, the laboratory glassware manufacturer.
