Delivery and Waiting Times

The delivery time is the time needed for the meniscus to pass from the upper mark to standstill wich is mostly the tip of the pipette or burette.

The waiting time starts after the delivery process finishes. During the waiting time remaining liquid continues to flow down from the glass wall. For the most accurate measure of volume with burettes and pipettes someone has to pay attention to the waiting time. Specially with pipettes you have to wipe off the pipette tip on the wall of the glassware that is used.