Patent
Solid phase extraction method and apparatus
Donald F. Hagen,Craig G. Markell +1 more
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TLDR
In this paper, a method and apparatus for performing solid-phase extraction on a fluid that contains solubles and suspended solids is presented, which includes a conduit, an SPE medium located in the conduit, and a fluid flow direction altering mechanism or an SPE rotating mechanism.Abstract:
A method and apparatus for performing solid-phase extraction (SPE) on a fluid that contains solubles and suspended solids. The method includes: (a) providing a volume of fluid that contains solubles and suspended solids, (b) processing the volume of fluid to extract solubles therefrom by the steps comprising: (i) passing a first portion of the volume of fluid in a first direction through a solid phase extraction medium; and then (ii) passing a second portion of the volume of fluid through the solid phase extraction medium in a second direction opposite to the first direction; and (c) repeating step (b) a plurality of times such that no substantial amount of the suspended solids is removed from the processed volume of fluid. The apparatus includes a conduit, an SPE medium located in the conduit, and a fluid flow direction altering mechanism or an SPE rotating mechanism.read more
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Journal ArticleDOI
Membrane approach to solid-phase extractions
TL;DR: In this paper, a novel material for separations has been developed in which efficient chromatographic particles are enmeshed in a network of PTFE fibrils to form a strong, porous sheet or "membrane".
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