Glass or PTFE burettes (also buret) is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. It is a long, graduated glass tube, with a stopcock at its lower end & a tapered capillary tube at the stopcock’s outlet.
- Burettes are manufactured from precision bore Borosilicate 3.3 tubing for accuracy
- Burettes with Schellbach are offered for accurate reading of meniscus
- Calibrated on computer-controlled machines
- Quality Control rechecks the burettes for accuracy
- Burettes are offered in Grade A with Batch Certificate
- Printed in Blue, waiting time is 30 seconds
A burette is a volumetric measuring glassware which is used in analytical chemistry for the accurate dispensing of a liquid, especially of one of the reagents in a titration. The burette tube carries graduated marks from which the dispensed volume of the liquid can be determined. Compared to a volumetric pipette, a burette has similar precision if used to its full capacity, but as it is usually used to deliver less than its full capacity, a burette is slightly less precise than a pipette
A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. It is a long, graduated glass tube, with a stopcock at its lower end and a tapered capillary tube at the stopcock’s outlet. The flow of liquid from the tube to the burette tip is controlled by the stopcock valve. There are two main types of burette; the volumetric burette and the Piston burette or Digital burette.
A volumetric burette delivers measured volumes of liquid. Piston burettes are similar to syringes, but with a precision bore and a plunger. Piston burettes may be manually operated or may be motorized. A weight burette delivers measured weights of a liquid.
. In order to measure the amount of solution added in or drained out, the burette must be observed at eye level straight to the bottom of the meniscus. The liquid in the burette should be completely free of bubbles to ensure accurate measurements. The difference in volume can be calculated by taking the difference of the final and initial recorded volume. Using the burette with a colorless solution may make it difficult to observe the bottom of the meniscus, so the black strip technique can make it easier to accurately observe and record measurements.
Application
The burette is used to measure the volume of a dispensed substance in a titration process, but is different from a measuring cylinder as its graduations measure from top to bottom. Therefore, the difference between the starting and the final volume is equal to the amount dispensed. The precision and control of the burette over other means of adding solution is beneficial for use in titration.
