Fig. 2.

Validation of the fluid in the disposable tube-in-tube reaction vessel: a) The experimental results confirming that the liquid in the inner tube does not flow out under capping and slight shaking, as well as under low-speed centrifugation. However, when the rotation speed exceeds 400 rpm, the solution in the inner tube flows out, and no observable solution residue remains in the inner tube when the rotation speed reaches 600 rpm and b) Volume of the red liquid remaining in the inner tube after centrifuging for sufficient time at different centrifugation speeds. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)