The Essential Test Tube Cleaning Brush In The Laboratory
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Update time : 2021-11-12 12:00:12
The test tubes in the experiment must be cleaned. The purpose is to have a serious impact on the experiment caused by residual impurities. If the experiment is done with an unclean test tube, it will greatly affect the results of the experiment. If it is serious, the experimenter will see the wrong experiment. Will lead to wrong conclusions. Everyone knows that the accuracy of experimental results is also related to the cleanliness of the utensils used in scientific experiments. The embassy is used many times and the amount is large, and the test tube must be cleaned before the experiment can be carried out.
The correct process of cleaning test tubes:
First try the test tube cleaning brush dipped in a special detergent, soapy water, or a special detergent, and scrub it up and down, and rotate it from side to side several times. Do not use too much force to avoid damage to the test tube. Then rinse with tap water, and finally rinse with distilled water.
Standards for cleaning test tubes:
After cleaning the glass instrument, there is no accumulation of water droplets on the inner and outer walls of the test tube, and no stream of water droplets flows down, indicating that the washing is clean.
When to clean the test tube:
To clean the test tube in time, it is easier to choose a suitable cleaning agent, because it will be easier to distinguish the nature of the residue; for example, in some chemical experiments, even if the leftover leaves after the reaction are poured out in time, there will be no residues that are difficult to remove in the test tube. The inner wall, but after a period of time, the volatile solvent evaporates to dryness, there will be residues sticking to the inner wall of the test tube, and cleaning will become more difficult.
Choose the detergent for cleaning the test tube:
1. Use water to clean water-soluble residues;
2. Special residues: alkaline residues can be cleaned with dilute sulfuric acid or dilute hydrochloric acid, and can be dissolved when the residue reacts with it;
3. If it is the residue of an acidic substance, it can be washed with sodium hydroxide solution, and the residue can be dissolved when it reacts with it.
4. If it is not easily soluble in alkaline or acidic residues, but soluble in some organic solvents, then choose organic solvents as detergents to react or dissolve the residues.
In the laboratory, the test tube cleaning brush is mainly used to clean the test tube. The handle of the test tube cleaning brush is made of iron or other metals. There are flexible cylindrical bristles on the top, with a little protruding bristle on the top. In order to match the test tubes of different diameters and lengths, the test tube cleaning brushes are also large and small. In medicine and piping, the test tube cleaning brush has an indelible contribution. It can clean the top of the test tube and both sides of the pipe, even if the depth is very high. Because the test tube cleaning brush can be customized according to needs, various styles and specifications can be customized.
Laboratory Test Tube Cleaning Brushes
Aoqun Brush is a powerful manufacturer of laboratory test tube cleaning brushes. Trust comes from word-of-mouth, and word-of-mouth makes a brand. The test tube cleaning brush is made of a brand new pure material wire. The second-used wire is easy to break, shed hair and become embrittled. The impurities contained in it may react with the experimental agent, so it is not recommended to use it. It is very important to choose a regular brush manufacturer.
