Abstract: The capabilities of a gas or liquid chromatography-molecular rotational resonance (GC/LC-MRR) instrument exceed those of high-resolution mass spectrometry and nuclear magnetic resonance in terms of selectivity, resolution, and compound identification. MRR detection provides high specificity for selective gas- or liquid-phase separations, including the ability to resolve co-eluting peaks and isomeric compounds without any loss of specificity or accuracy. MRR can perform both qualitative identification and absolute quantification of analyte components separated by GC or LC without a reference standard. GC-MRR is ideal for compound-specific isotope analysis (CSIA) and can identify enantiomers and enantiomeric excess. GC-MRR measurements are especially useful for studying biosynthetic/degradation and geochemical isotopic compounds.

Abstract: The present invention relates to a novel stationary phase support for liquid chromatographic chiral separations. The specific combination of the special underlying support material and certain classes of known chiral selectors according to the invention produces far superior chiral (enantiomeric) separations than those obtained on any conventionally known supports. These chiral (enantiomeric) separations are enhanced in terms of significantly higher efficiencies (theoretical plate numbers), higher resolutions (Rs), shorter retention times and either equivalent or slightly higher selectivities than those obtained on conventional supports.

Abstract: The present invention relates to superficially porous particles (SPPs), also called core-shell, porous shell or fused core particles, which are state-of-the-art support materials used in the production of HPLC columns. Hydrolytically stable, highly selective superficially porous particle (SPP) hydrophilic interaction liquid chromatographic (HILIC) stationary phases having higher efficiencies and shorter retention times than analogous stationary phases on fully porous particles (FPP) is provided.

Abstract: This disclosure provides methods and devices for quantitating, separating and/or detecting water in a liquid, gas or solid sample comprising one or more chemicals, the method comprising: providing the liquid, gas or solid sample comprising water and the one or more chemicals; and exposing said liquid, gas or solid sample to at least one solid support including at least one dicationic and/or tricationic species of Formula I or II adsorbed, absorbed or immobilized on the solid support.

Abstract: The present invention relates to superficially porous particles (SPPs), also called core-shell, porous shell or fused core particles, which are state-of-the-art support materials used in the production of HPLC columns. Hydrolytically stable, highly selective superficially porous particle (SPP) hydrophilic interaction liquid chromatographic (HILIC) stationary phases having higher efficiencies and shorter retention times than analogous stationary phases on fully porous particles (FPP) is provided.

Abstract: The present invention relates to a novel stationary phase support for liquid chromatographic chiral separations. The specific combination of the special underlying support material and certain classes of known chiral selectors according to the invention produces far superior chiral (enantiomeric) separations than those obtained on any conventionally known supports. These chiral (enantiomeric) separations are enhanced in terms of significantly higher efficiencies (theoretical plate numbers), higher resolutions (Rs), shorter retention times and either equivalent or slightly higher selectivities than those obtained on conventional supports.

Abstract: The chromatographic separation material is a cyclofructan or a derivative of cyclofructan covalently bonded to a cross-linked, organic polymer. The separation material works well in hydrophilic interaction liquid chromatography.

Abstract: This disclosure provides methods and devices for quantitating, separating and/or detecting water in a liquid, gas or solid sample comprising one or more chemicals, the method comprising: providing the liquid, gas or solid sample comprising water and the one or more chemicals; and exposing said liquid, gas or solid sample to at least one solid support including at least one dicationic and/or tricationic species of Formula I or II adsorbed, absorbed or immobilized on the solid support.

Abstract: The present invention relates to derivatized cyclofructan compounds, compositions comprising derivatized cyclofructan compounds, and methods of using compositions comprising derivatized cyclofructan compounds for chromatographic separations of chemical species, including enantiomers. Said compositions may comprise a solid support and/or polymers comprising derivatized cyclofructan compounds.

Abstract: This disclosure provides methods and devices for quantitating, separating and/or detecting water in a liquid, gas or solid sample comprising one or more chemicals, the method comprising: providing the liquid, gas or solid sample comprising water and the one or more chemicals; and exposing said liquid, gas or solid sample to at least one solid support including at least one dicationic and/or tricationic species of Formula I or II adsorbed, absorbed or immobilized on the solid support.

Abstract: An RC filter that is tunable in terms of its cut-off frequency comprising a drop placed on one or more dielectric layers, a conducting layer underneath the dielectric layer, a nonconducting layer underneath the conducting layer, and an external resistor attached to the drop via an electrode, wherein the cut-off frequency of the filter is tuned by changing the shape or composition of the drop and methods of using the filter as a detector.

Abstract: Dicationic liquid salts and methods of using such dicationic liquid salts in techniques such as ESI-MS are provided.

Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising such diionic liquids and the use of such diionic liquids as the stationary phase in a gas chromatographic column.

Abstract: Imidazolium-based dicationic liquid salts and methods of using such imidazolium-based dicationic liquid salts in techniques such as ESI-MS are provided.

Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising diionic liquids and the use of diionic liquids as the stationary phase in a gas chromatographic column.

Abstract: The chromatographic separation material is a cyclofructan or a derivative of cyclofructan covalently bonded to a cross-linked, organic polymer. The separation material works well in hydrophilic interaction liquid chromatography.

Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).

Abstract: An RC filter that is tunable in terms of its cut-off frequency comprising a drop placed on one or more dielectric layers, a conducting layer underneath the dielectric layer, a nonconducting layer underneath the conducting layer, and an external resistor attached to the drop via an electrode, wherein the cut-off frequency of the filter is tuned by changing the shape or composition of the drop and methods of using the filter as a detector.

Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising diionic liquids and the use of diionic liquids as the stationary phase in a gas chromatographic column.

Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising such diionic liquids and the use of such diionic liquids as the stationary phase in a gas chromatographic column.