Abstract: A system for providing standard mixtures of volatile and semi-volatile organic compounds for simultaneous GC and MS calibration in a calibration vial, wherein calibration mixtures are prepared by diluting calibration analytes in granular PDMS such that most of the analytes are in the PDMS phase and the sample can then be taken from the analytes in the headspace vapor in the calibration vial, wherein a reliable calibration sample can be taken from the calibration vial because the analytes in the PDMS phase and the headspace vapor are in thermodynamic equilibrium, and wherein the method provides solvent-less sampling, long-time stability, ease of use, is quantifiable, and related to temperature.

Abstract: The present disclosure relates generally to processes for separating chemical compounds via two-dimensional gas chromatography. Certain embodiments comprise rapid heating and cooling of the second dimension column by a unique arrangement of heating and cooling elements.

Abstract: The present disclosure relates generally to systems for separating chemical compounds via two-dimensional gas chromatography. Certain embodiments of the system are configured to rapidly heat and cool the second dimension column by a unique arrangement of heating and cooling elements.

Abstract: The invention relates to removing contaminants from jet fuel or kerosene using solid sorbents that are comprised primarily of carbon and preferably of coke particles. The coke particles have an affinity for contaminants in jet fuel and kerosene and are sized to be filtered from the liquid fuel without plugging. As the contaminants agglomerate onto the solid sorbent, the resulting particles form a filter cake on conventional filter materials in such a way as to allow the jet fuel or kerosene to pass on through without significant pressure drop or delay.

Abstract: The present disclosure relates generally to systems for separating chemical compounds via two-dimensional gas chromatography. Certain embodiments of the system are configured to rapidly heat and cool the second dimension column by a unique arrangement of heating and cooling elements.

Abstract: The present disclosure relates generally to processes for separating chemical compounds via two-dimensional gas chromatography. Certain embodiments comprise rapid heating and cooling of the second dimension column by a unique arrangement of heating and cooling elements.

Abstract: The invention relates to removing contaminants from jet fuel or kerosene using solid sorbents that are comprised primarily of carbon and preferably of coke particles. The coke particles have an affinity for contaminants in jet fuel and kerosene and are sized to be filtered from the liquid fuel without plugging. As the contaminants agglomerate onto the solid sorbent, the resulting particles form a filter cake on conventional filter materials in such a way as to allow the jet fuel or kerosene to pass on through without significant pressure drop or delay.

Abstract: A system for providing standard mixtures of volatile and semi-volatile organic compounds for simultaneous CC and MS calibration in a calibration vial, wherein calibration mixtures are prepared by diluting calibration analytes in granular PDMS such that most of the analytes are in the PDMS phase and the sample can then be taken from the analytes in the headspace vapor in the calibration vial, wherein a reliable calibration sample can be taken from the calibration vial because the analytes in the PDMS phase and the headspace vapor are in thermodynamic equilibrium, and wherein the method provides solvent-less sampling, long-time stability, ease of use, is quantifiable, and related to temperature.

Abstract: A compliant column sheath assembly for use in a gas chromatograph is provided which includes an open tubular column in the form of a helical coil having a coiled length of between about 5 and 15 cm. The sheath assembly further includes an insulating sheath which surrounds the open tubular column and a frame. When incorporated in a gas chromatograph, the compliant column sheath assembly allows samples to be analyzed in about 2 to 10 seconds.

Abstract: A compliant column sheath assembly for use in a gas chromatograph is provided which includes an open tubular column in the form of a helical coil having a coiled lengt of between about 5 and 15 cm. The sheath assembly further includes an insulating sheath which surrounds the open tubular column and a frame. When incorporated in a gas chromatograph, the compliant column sheath assembly allows samples to be analyzed in about 2 to 10 seconds.