Sample pretreatment and extraction
AssigneeDionex Corporation
InventorsKannan Srinivasan, Bruce Richter, Christopher A. Pohl, Brett Murphy, Brian Dorich, S. M. Rahmat Ullah
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Abstract
A method for pretreating and extracting a liquid sample by sorbing an aqueous liquid sample, including an organic analyte and an acid or a base, in a solid sorbent material, and at least partially neutralizing the acid or base by reaction with neutralizing ions retained on a support surface, and contacting the liquid sample-sorbed sorbent material at elevated temperature and pressure with an organic solvent to extract the analyte into said solvent, preferably in a vessel having an extraction chamber with a zirconium metal interior surface.
Claims22
A method of separating an organic analyte from an acid in a sample comprising:
- a) sorbing a sample in a solid sorbent material having a surface comprising cationic moieties, wherein the sample includes an organic analyte and an acid and wherein the cationic moieties react with the acid to form a salt thereof;
- and
- b) contacting the sample-sorbed sorbent material with an organic solvent to extract the organic analyte;
- c) collecting the organic solvent with the extracted analyte, thereby separating the organic analyte from the acid in the sample.
Dependencies are inferred from the claim text.