Drying and preservation of glass instruments

The instruments often used to do experiments should be washed and dried after each experiment. The instruments used in different experiments have different requirements for drying. In general, the beaker, conical bottle and other instruments in quantitative analysis can be washed off, while many of the instruments used in organic chemistry experiments or organic analysis require drying, some of which require no trace of water. Some require no water, should be based on different requirements to dry the instrument. Today Huibai Reagent introduces the drying and storage methods of glass instruments.

Drying method of Glass instrument（http://www.hnhbsj.com）

1, dry (control drying) is not urgent, generally dry, can be washed in pure water, in the dustless place upside down to remove moisture, and then natural drying. The equipment can be placed on shelves with skew wood nails and glass cabinets with breathable holes.
2. The instrument of drying and cleaning is controlled to remove moisture and be dried in the electric oven. The oven temperature is about 105-120 ℃ for 1 hour. Also can be placed in the infrared light drying box. This method is applicable to general instruments. The weighing bottle should be cooled and stored in the dryer after drying. With solid glass plugs and thick wall equipment drying should pay attention to slowly heating and temperature not too high, so as to avoid cracking, the measuring device should not be placed in the oven drying.

Hard test tube can be dried by alcohol lamp. Bake the test tube from the bottom and turn the test tube down so as not to blow up the test tube when the water droplets are backflow. When baking to no water, drive the test tube up to clean water vapor.

Hot (cold) air drying can be done by blowing dry instruments that are eager to dry or larger instruments that are not suitable to be placed in the oven, usually with a small amount of ethanol, The acetone (or finally ether) is poured into a controlled dewatered instrument to wash the clean solvent (solvent to be recovered), then blow with a hair dryer, start blowing with a cold air for 1 to 2 mins, and when most of the solvent volatilizes, blow in the hot air until completely dry, The residual steam is then blown with a cold wind so that it is no longer condensed in the container. This method requires good ventilation, prevent poisoning, not contact with open fire, to prevent organic solvents explosion. Of course, the glass instrument dryer is the best choice! Because of its speed and energy saving, No water stains, easy to use, simple maintenance and other advantages. Can blow cold and hot two kinds of wind.

Storage methods of glass instruments（http://www.hnhbsj.com）

The glass instruments in the storage room should be stored in different categories so that they can be used. Frequently used glass instruments are placed in experimental cabinets. Safe, high and large ones should be placed in them.

1. The pipette is washed and placed in a dustproof box.
2. After the tube is used, wash the inside solution, clean it with pure water, cover the glass short test tube or plastic casing, or clip it upside down on the tube rack.
3. After the dishes are washed, the paper is padded in a porcelain or plastic plate, and then dried upside down into a dish box or a clean vessel.
4. The instrument capacity bottle or colorimetric tube with abrasive plug should be bolted with rubber band or small cord before washing to avoid breaking plug or mixing with each other. For long-term storage, pad a piece of paper between plugs so as not to stick to it for long periods of time. Long-term use of the tube to remove Vaseline after the pad paper, with leather tendons good piston preservation.
5. The complete sets of instruments such as Soxhlet extractor and gas analyzer should be cleaned immediately and stored in special cartons.

In short, in the spirit of being responsible for our work, we should clean and keep all the glass instruments we use after we have used them, keep them in good working habits, and do not leave any grease or acid in the instrument. Corrosive substances (including concentrated lye) or toxic drugs to avoid future infirmities.

The material comes from the network.
For more information on biochemical reagents, check out Huibai Reagent's official website: http://www.hnhbsj.com
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