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Device and method for making discrete volumes of a first fluid in contact with a second fluid, which are immiscible with each other

  • US 7,955,864 B2
  • Filed: 08/22/2006
  • Issued: 06/07/2011
  • Est. Priority Date: 08/22/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • providing a first fluid disposed in a container having a bottom;

    ejecting a volume of a second fluid from a through-hole in the container bottom, thereby forming a first droplet of the second fluid in the first fluid, which first droplet rises in the first fluid relative to an intake tip of a conduit such that the first droplet is disposed adjacent the intake tip, wherein the first fluid and the second fluid are immiscible with respect to one another and the second fluid is less dense than the first fluid;

    moving at least one of the first droplet and an intake tip of a conduit relative to one another such that the first droplet is disposed adjacent the intake tip when ejected; and

    drawing the first droplet and an amount of the first fluid through the intake tip and into the conduit.

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