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Buret

Burettes are divided into alkaline burettes and acid burettes. The former is used to measure liquid reagents that are corrosive to glass tubes; the latter is used to measure liquids that are corrosive to rubber. The lower end of the acid burette is a glass piston. The lower end of the alkaline buret is connected to a small glass tube with a pointed tip by a rubber tube. One type of burette is a universal burette with a polytetrafluoroethylene stopcock.
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Material

Glass

Specification

10ml-100ml

Color

WHITE/BROWN



Practical tips

1.There should be no air bubbles at the lower end of the burette. Quickly dispensing the liquid can drive away the bubbles in the acid burette; gently lift the pointed glass tube and squeeze the glass ball with your fingers to drive away the bubbles in the alkaline burette.

2. Alkaline burettes are not suitable for containing solutions that are corrosive (strongly oxidizing or acidic) to rubber tubes, such as iodine, potassium permanganate, silver nitrate and hydrochloric acid.

3. Acid burettes must not be used to hold alkaline solutions, because the ground part of the glass is easily corroded by the alkaline solution, making it impossible to rotate the stopper.

4.  A burette is different from a measuring cylinder in that its velocity changes from small to large from top to bottom.

5.The buret should be washed immediately after use.


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