Patent ID: 8629264

Claim:
A process for extracting nucleic acid from a solution, the process comprising: providing a conduit comprising a binding channel having an inner surface, a first port, and a second port, wherein the first port and the second port are in fluid communication with the binding channel; introducing the solution containing nucleic acid into the binding channel such that the solution is in contact with the inner surface and at least a portion of the nucleic acid binds to the inner surface to produce a bound nucleic acid and a residual solution; positioning a siphon tube having a first end connected to the second port such that a second end of the siphon tube is open to ambient pressure, a portion of the siphon tube is disposed at an elevation above the binding channel and the second end is configured to be adjusted vertically to control a fluid flow and wash; and fluidly connecting a reservoir of first wash buffer disposed at an elevation above the binding channel to the first port such that gravity forces the first wash buffer to flow through the first port into the binding channel, the first wash buffer thereby displacing the residual solution from the binding channel and through the siphon tube, whereby the bound nucleic acid is washed.