Laboratory Glass Burette Boro3.3 Glass Burette with PTFE Stopcock

The basic buret is used to hold alkaline solution. Its lower end is connected with a rubber tube. Glass beads are placed in the rubber tube to control the flow of solution. A pointed glass tube is connected to the lower end of the rubber tube. Any solution that can react with the rubber tube, such as potassium permanganate, iodine and other solutions, cannot be put into the basic buret.

The main part of the buret is made of glass tube with uniform inner diameter and accurate scale. The lower end is connected with a glass cock or latex tube containing glass beads to control the liquid flow rate, and the bottom end is connected with a sharp glass tube. The burette with the glass cock at the lower end is called an acid burette, which is often used to measure the volume of the non strong alkaline dilute solution dripped. It is not suitable to contain alkaline solution, because the alkaline solution can corrode the glass for a long time, causing the cock to be unable to rotate.