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Let’s learn about the method of drying glass instruments

[Drying of glassware]

Instruments that are often used in experiments should be cleaned and dried for later use after each experiment. The instruments used in different experiments have different requirements for drying. Generally, the beakers, conical flasks and other instruments in quantitative analysis can be used after washing, but many instruments used in organic chemistry experiments or organic analysis require drying, and some Require no traces of water, and some require no water. The instrument should be dried according to different requirements.Wholesale Glass Beakers,beaker bottle,800ml beaker,glass beaker low form,small beaker
1. Drying: It is not urgent to use, and requires general drying. After rinsing in pure water, it can be digged upside down in a dust-free place to remove the moisture, and then dried naturally. The instrument can be placed on a shelf with oblique wooden nails and a glass cabinet with ventilation holes.
2. Drying: The cleaned instrument is controlled to remove moisture and dried in an electric oven at a temperature of 105-120°C for about 1 hour. It can also be dried in an infrared lamp drying box. This method is applicable to general instruments. After drying, the weighing bottles used for weighing should be cooled and stored in a desiccator. When drying instruments with solid glass plugs and thick walls, pay attention to the temperature rise slowly and the temperature should not be too high to avoid cracking, and the measuring device should not be dried in the oven. The hard test tube can be dried with an alcohol lamp. The test tube should be dried from the bottom with the test tube mouth down to avoid backflow of water droplets and bursting the test tube.
3. Air drying: For instruments that are eager to dry or larger instruments that are not suitable for ovens, you can use the method of drying. Usually a small amount of ethanol and acetone are poured into the instrument that has been controlled to remove water. ), then blow with a hair dryer, and start blowing with cold air for 1-2 minutes. After most of the solvent has evaporated, blow in hot air until it is completely dry, and then use cold air to blow the remaining steam so that it no longer condenses in the container. This law requires good ventilation to prevent poisoning, and no exposure to open flames to prevent explosion of organic solvents.Wholesale Glass Beakers,beaker bottle,800ml beaker,glass beaker low form,small beaker