IMAGE. Rinsing buret by rotating between fingers.
A buret should be cleaned and primed before use.
To clean a buret with distilled water, close the stopcock and place about 5 mL of distilled water in the buret. Carefully, hold the buret horizontally over a sink and rotate the buret so that the entire inner surface is coated with the distilled water. Repeat this procedure at least three times. A small amount of detergent could be used to clean burets that will not clean up with distilled water. In these cases, you should rinse with lots of water to remove the detergent.
A buret is primed by placing about 5 mL of the titrant in the
buret. Carefully, hold the buret horizontally over a sink and rotate it
so that the entire inner surface is coated with the titrant.
Place the primed buret in the buret clamp. Place a "waste"
beaker under the buret and allow the titrant to drain through the buret
stopcock to rinse the buret tip. Discard the waste rinse solution
Repeat priming procedure at least two more times to ensure that the solution in the buret is a homogeneous solution (that the concentration of the solution is the same throughout the buret). Discard the rinse solution.