Combined buret

The utility model discloses a combined buret, which comprises a buret body, wherein a medicine inlet of the buret body is communicated with an air outlet of a rubber pipette bulb through a hose, and an air exhaust pipe is arranged on the hose. The utility model has the advantages that the problem that liquid in the buret has air bubbles is solved, so the goal of improving the test precision is reached. When the combined buret is used, the air exhaust pipe is blocked, the rubber pipette bulb is squeezed by a hand for exhausting the air in the rubber pipette bulb from a titration opening of the buret, the titration opening is placed in titrant, then, the rubber pipette bulb is released, at the time, the titrant without air bubbles is fast absorbed into the buret under the effect of the negative pressure, and then, the exhaust pipe is opened so that an inner cavity of the exhaust pipe is communicated with the atmosphere, and the titration operation can be accurately carried out.