A closed loop extraction process contains a filter assembly 20 for vacuum filtration of an extraction solvent 50 after it has extracted desired constituents from a plant material. High purity products formed from the process are also provided. A closed loop extraction system 10 contains a filter assembly 20 for filtering an extraction solvent 50 and extract prior to collection of desired products within a collection vessel 34. A filter assembly 20, used in the aforementioned process and system 10, provides a novel enhancement in the current strategies to extract active ingredients from plant materials 52.

A closed loop extraction process contains a filter assembly 20 for vacuum filtration of an extraction solvent 50 after it has extracted desired constituents from a plant material. High purity products formed from the process are also provided. A closed loop extraction system 10 contains a filter assembly 20 for filtering an extraction solvent 50 and extract prior to collection of desired products within a collection vessel 34. A filter assembly 20, used in the aforementioned process and system 10, provides a novel enhancement in the current strategies to extract active ingredients from plant materials 52.

Provided is a method for measuring the concentration of aliphatic hydroxy oxime and neodecanoic acid using gas chromatography. The method includes the steps of: (a) removing, from a reference material containing an extractant and a diluent, the diluent using a silica column; (b) generating a calibration curve by calculating each peak area of aliphatic hydroxy oxime and neodecanoic acid, which are extractants, by peak integration of gas chromatograms; and (c) calculating the peak area of the organic solvent used in DSX process through the steps (a) and (b) and comparing the peak area with the calibration curve of the step (b) to measure the concentration of aliphatic hydroxy oxime and neodecanoic acid.

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.

The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.

Disclosed herein is a method for obtaining compounds and compositions from plant and fungus materials by thermal treatment, affinity capture, filtration, and release through multi-phasic transitions between gas, solid, and liquid states. The compounds of interest are obtained by manipulating the temperature and pressure of the heating chamber. The compounds in gas phase are passed through an affinity medium which captures the compounds of interest in either solid or liquid phase by exposing the compound of interest to the localized micro-affinity environment of the medium. The compounds are separated from the medium using direct competition with solvent or buffers optimized for the specific chemical properties of compounds.

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.

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.

This invention employs columns and methods to apply external and internal standards and compounds. Analytical standard or compounds 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 a solvent.

The present disclosure provides a porous silica having an average pore diameter of at least 210 Å and a pore volume of at least 0.80 cm.sup.3g.sup.−1. The present disclosure also provides a method of producing the porous silica including gelling a liquid phase-dispersed nanoparticulate silica in the presence of either (i) a Brønsted acid and an amine group having two or more primary or secondary amine groups or (ii) an amino acid.