The racks for the 24-port model of the Visiprep™ SPE Vacuum Manifold are designed for use with smaller collection vessels. The widest collection vessel recommended for the 24-port model is a small 22.75 mm outer diameter scintillation vial. Since 50 mL centrifuge tubes have a nominal outer diameter of 30 mm, they would not fit this model.
There is no containment system to separate collection vessels during sample processing. The disposable liner from each port can be inserted with slight depth into the respective collection vessel to reduce the likelihood of fine solvent particles being aspirated into the manifold.