Isopotential available ion extractor
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United States of America Patent
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Mar 28, 1989
Grant Date -
N/A
app pub date -
Nov 27, 1987
filing date -
Nov 27, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reusable extractor for obtaining a representative sample of the exchangeable ions from a complex heterogeneously saturated ion exchange system such as soil or other complex and colloidal matrices at various oxidation-reduction potentials without the need for costly extraction and purification steps. The extractor comprises a microporous dialysis membrane tube filled with cation- or anion-exchange resin beads. Extraction is effected by equilibrating homoionically saturated ion-exchange resin beads with a sample of the complex matrix under study. The extractor enables simple, rapid, multiple-element assays and provides the new capability of extracting exchangeable ions from stream, lake, and marine sediments in situ.
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