Apparatus for pre-concentration of a sample for spectroscopical reasons
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United States of America Patent
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Sep 3, 1991
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N/A
app pub date -
Nov 30, 1989
filing date -
Dec 16, 1988
priority date (Note) -
Expired
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Abstract
An apparatus for the pre-concentration of a sample substance for spectroscopical reasons in the flow injection analysis having an ion-exchanger column of conical shape filled with a granular ion-exchanger. For pre-concentration of the sample, the sample liquid flows through the ion-exchanger column from the smaller first end. Then the pre-concentrated elements are eluted by an eluting liquid from the wider second end. Therewith, a very low dispersion of the eluted sample slug results. Thus, a considerable increase in the degree of sensitivity can be achieved with high analysis frequency.
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