滴定管

滴定管

A burette, also known as a buret or a titration tube, is a laboratory instrument used in analytical chemistry for the dispensing and measurement of variable amounts of a chemical solution. It is typically made of glass and has a long, narrow, cylindrical shape. The burette is designed to hold a precise volume of liquid, which can be dispensed in small, controlled increments by opening and closing a stopcock at the bottom of the instrument. This makes it ideal for use in titrations, where small amounts of a solution are added to another solution until a chemical reaction is complete. Burettes are commonly used in analytical chemistry to determine the concentration of a solution by titration. In this process, a known volume of a solution of known concentration is added to a solution of unknown concentration until the reaction is complete. The volume of the known solution required to complete the reaction is used to calculate the concentration of the unknown solution. Burettes are also used in other types of chemical analysis, such as acid-base titrations, redox titrations, and complexometric titrations. Burettes are available in a range of sizes, typically from 10 mL to 100 mL, and can be calibrated to measure volumes with high accuracy. They are often used in combination with other laboratory instruments, such as pipettes, to accurately measure and dispense small volumes of liquid.

burette, titration, analytical chemistry, solution, stopcock

— Christopher Taylor