Composite membranes for solid phase extractions and reactions
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United States of America Patent
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Apr 14, 1998
Issued Date -
N/A
app pub date -
Mar 5, 1997
filing date -
Jul 15, 1994
priority date (Note) -
Expired
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Abstract
A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.
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