- HPLC Autosamplers (715, 717, Alliance, 2695, 2795)
- ACQUITY UPLC Sample Managers
- The syringe needle of an autosampler does not go all the way to the bottom of a vial, and therefore some sample will always remain. This is referred to as the residual volume of the vial. Some vials have a tapered bottom for example, which decreases the residual volume. This can be important if the sample is valuable and of limited amount.