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Method and apparatus for directly sampling a fluid for microfiltration

  • US 6,398,956 B1
  • Filed: 05/30/2000
  • Issued: 06/04/2002
  • Est. Priority Date: 05/28/1999
  • Status: Expired due to Fees
First Claim
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1. filtration cell capable of direct sampling of a fluid from a container, the filtration cell comprising:

  • (a) a reservoir to receive the fluid to be filtered, (b) a filter membrane capable of filtering the fluid to provide a filtrate, the membrane being operatively associated with an opening in the reservoir such that fluid is able to flow over the filter membrane, (c) a base to receive the filtrate after it passes through the membrane, the base including a path through which the filtrate is guided to an outlet from the filtration cell, (d) a piercing instrument supported in the filtration cell adapted to pierce a container holding the fluid to be filtered, the piercing instrument including a hollow interior in open communication with the reservoir and adapted to be in open communication with an interior of a pierced fluid container, and (e) a flow channel extending between the piercing instrument and the reservoir such that the hollow interior of the piercing instrument is in communication with the reservoir through the flow channel, wherein the flow channel is open to the filter membrane so that fluid to be filtered can be directly passed from a fluid container over the filter membrane as it is transferred from the hollow interior of the piercing instrument, through the flow channel and into the reservoir.

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