Centrifuge tube with a built-in small tubing for separation following density gradients centrifugation

摘要

A new type of centrifuge tube convenient for separation after density gradients centrifugation is invented. The inner bottom of the centrifuge tube is in a funnel shape, and an orifice is located at the narrowest place of the funnel neck. The orifice connects to a small tube, which is built inside the centrifuge tube wall and spanning the entire length of the centrifuge tube. The centrifuge tube can be used either as a centrifuge tube or a separation funnel. Such a tube not only saves time but also improves the efficiency of separation after density gradients centrifugation, because the built-in small tube is capable of performing separation by means of siphonic effect.