Burette

Abstract

The invention relates to a burette. The burette is composed of a ball holding body, a liquid charging cock, a titration graduated tube, a branch tube, a piston, a buffer ball, a titration cock and a dropper. The ball holding body is located at the top end of the titration graduated tube and is hemispherical, and the capacity of the ball holding body is within the range of 25-30ml; the liquid charging cock is located under the ball holding body and used for controlling the communication of the ball holding body and a titrant below; the titration cock is located under the titration graduated tube and used for controlling the flow rate and the speed of titration; the liquid charging cock and the titration cock both are made of a rigid polyvinyl chloride material; metering scale marks are formed on the surface of the titration graduated tube and the minimum scale is 0.1ml; the branch tube is located above the titration graduated tube; the piston is arranged in the middle of the branch tube and an air outlet is formed in the tail end of the branch tube; the buffer ball is located under the branch tube; the dropper is located at the bottom of the titration graduated tube and is capable of controlling the titer. The burette has the advantages of convenient filling, small length, easy discharge of air in the burette, universality in acids and basses, and realization of accurate metering titration.

Description

technical field [0001] The invention relates to a measuring instrument for chemical experiments, in particular to a burette, which belongs to the field of glass instruments. Background technique [0002] The burette is a commonly used and necessary container in the laboratory. When performing titration analysis experiments, it is inconvenient to operate when filling the titrant. The acid burette commonly used in the laboratory is prone to air bubbles during use, and the bubble solution stays in the bend of the glass tube body, blocking the glass tube, resulting in incorrect titration. Moreover, the drip opening is large and cannot be adjusted, resulting in errors when reading the scale. In addition, the commonly used acid burette and alkaline burette in the laboratory cannot be used together, resulting in a waste of energy. Therefore, it is extremely important to develop a burette that is easy to remove air and is suitable for acidic solutions and alkaline solutions. [...

AI Technical Summary

Problems solved by technology

In the titration analysis experiment, it is inconvenient to operate when filling the titrant

The acid burette commonly used in the laboratory is prone to air bubbles during use, and the bubble solution stays in the bend of the glass tube body, blocking the glass tube, resulting in incorrect titration

Moreover, the drip opening is too large and cannot be adjusted, resulting in errors when reading the scale

In addition, acid burettes and alkaline burettes commonly used in laboratories cannot be mixed, resulting in a waste of energy.

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