Liquid chromatographic method and apparatus with a packed tube membrane device for post-column derivatization/suppression reactions
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United States of America Patent
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Jun 14, 1988
Issued Date -
N/A
app pub date -
Apr 25, 1986
filing date -
Sep 18, 1981
priority date (Note) -
Expired
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Abstract
Packing tube membranes or membrane channels for Ion Chromatography with inert or charged ion exchange beads greatly increases overall suppressor efficiency. The length of membrane required is reduced, e.g. from 20 feet to 5 feet and bandspreading is reduced from 870 .mu.l to 200 .mu.l. This significant increase in efficiency is attributed to the mixing action of the packing on the flow stream which results in convective radial transport much more rapid than the diffusion controlled transport observed in unpacked membranes. The technique is also described for developing more efficient liquid chromatographic post-column reactors for adding reagent to the column effluent to increase detection sensitivity.
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