What do I need to do to return to the laboratory after returning to work?

- Mar 04, 2020-

What do I need to do to return to the laboratory after returning to work?

Understand the maintenance and maintenance of the instrument is a basic skill that the user should have. Because the maintenance and maintenance of the instrument is related to the integrity of the instrument, the utilization rate and the success rate of the experimental teaching, so the maintenance and maintenance of the instrument can be described as An important part of the use of the instrument in experiments and production. Once the instrument adsorbs dust and dirt, it not only affects the performance of the instrument, shortens the service life, directly affects the experimental results, but also affects the aesthetics and the physical and mental health of the experimenter. Therefore, dust removal and cleaning are the highlights of instrument maintenance.

First, dust removal

Cleaning equipment

The following describes several common instruments and cleaning methods for different material parts.

(A) cleaning of glassware

(Two) cleaning of rubber parts

1 Common electrical instrument maintenance

(1) Electronic balance

(2) Electric heating constant temperature drying box

(3) Constant temperature water bath

2 Use and maintenance of common glass instruments

(1) Beaker

(2) Test tube

(3) Volumetric flask

(4) Burette

3 Washing of common glass instruments

Laboratory glass instruments such as beakers, test tubes, burettes, pipettes, volumetric flasks, etc. The instrument will be stained with oil, scale, rust, etc. during use. If it is not completely cleaned in time after use, it will cause error in the results and even have an extremely adverse effect on the life and performance of the instrument. Therefore, glass instruments used in chemical experiments must be cleaned. Here are some methods for washing glass instruments.

Attached simple instruments such as test tubes for easy removal. Beakers, etc., first rinse with tap water, then dipped in synthetic detergent with a test tube brush, and then rinse with tap water. When the instrument is turned upside down, a uniform water film is formed on the wall of the device, and it is washed when it does not flow down.

Oily glassware should be washed with alkaline alcohol washing solution, then with detergent or soapy water, and then rinsed with tap water.

Containers with rust and scale are soaked with (1 + 3) hydrochloric acid washing solution, and then rinsed with water.

Vaseline oil-stained utensils, wipe away the vaseline, wash with boiling water or soapy water, cook, and rinse with tap water.

Some relatively sophisticated and complicated glass instruments, such as volumetric flasks, pipettes, etc.