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US 12,269,012 B2Granted
Columns and methods of use for analytical standards and compounds
OwnerThomas Jakschitz, Douglas T. Gjerde +1inventors
InventorsThomas Jakschitz, Douglas T. Gjerde, Guenther Bonn
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Abstract
This invention employs solid phase extraction media and column methods to apply external and internal standards and compounds. Analytical standard or compounds including PFAS are adsorbed to a solid phase extraction media and are stored indefinitely. The standards or compounds remain stable on the solid phase extraction media without decomposing. The standards or compounds may be removed from the solid phase extraction media with an elution solvent or reagent.
Claims6
A method of quantitating PFAS in a sample, comprising:
- adsorbing PFAS in the sample to solid phase extraction media and PFAS standard compounds,
- wherein the PFAS standard compounds are adsorbed to said solid phase media, and
- wherein the solid phase extraction media is free of elution reagent;
- eluting the PFAS and PFAS standard compounds from the solid phase extraction media with an elution solvent;
- and
- analyzing the eluted PFAS, wherein the PFAS standard compounds are used as internal standards.
3 more elements
Dependencies are inferred from the claim text.