Abstract: Interface (350) for the controlled transport of a flow of an inlet mixture (352), in solution or suspension, towards a target zone, preferably towards a deposition surface (610), characterized in that it comprises:—a perforated extraction barrier (402) comprising at least one laminar element perforated with a plurality of holes intended to be crossed by a flow of said mixture (352), said perforated extraction barrier (402) being positioned at the entrance of a compression region (560) configured to reduce the cross section of said flow (352),—said compression region (560) being fluidically connected with at least one opening for the inlet of a gas counterflow (606),—said compression region (560) being fluidically connected with an exhaust circuit (508) for at least one gas, said exhaust circuit (508) being positioned between the perforated extraction barrier (402) and the opening for the inlet of said gas counterflow (606).

Abstract: An apparatus chemical analysis of a sample includes: a chromatographic module configured to separate compounds that make up a mixture to be analyzed and which is configured to determine a linear retention index of the separated compounds; a module for mass spectrometry, configured to detect and/or determine mass spectra of the separated compounds, from the chromatographic module; a module for IR spectroscopy, configured to detect and/or determine the IR spectra of the separated compounds, from said chromatographic module; at least one processing unit configured to receive data, acquired by the chromatographic module; the module for mass spectrometry; and the module for IR spectroscopy; and at least one memory unit associated with the at least one processing unit, having at least one organized file containing the retention indices, the mass and IR spectra of a plurality of known and predefined compounds.

Abstract: Methods and apparatus for desolvating flowing liquid streams while retaining temporal resolution of dissolved substrates are disclosed. A novel small-scale self-regulating spray dryer preserves temporal resolution while desolvating a liquid chromatography eluent stream and depositing the solute onto an optical surface for infrared spectrographic analysis. The liquid eluent is pumped through a heated nebulizer to create a high-speed jet of solute containing liquid and solvent vapor. This jet is directed circumferentially inside a hot cylindrical cavity. Centrifugal force causes the larger liquid droplets to travel along the outer diameter of the cavity. The cavity surface is heated to cause the droplets to film boil. Film boiling reduces droplet contact with the cavity surface thereby retaining the solute in the droplets. The solute temperature is limited by controlling the pressure into which the solvent evaporates from the droplets.

Abstract: Methods and apparatus for desolvating flowing liquid streams while retaining temporal resolution of dissolved substrates are disclosed. A novel small-scale self-regulating spray dryer preserves temporal resolution while desolvating a liquid chromatography eluent stream and depositing the solute onto an optical surface for infrared spectrographic analysis. The liquid eluent is pumped through a heated nebulizer to create a high-speed jet of solute containing liquid and solvent vapor. This jet is directed circumferentially inside a hot cylindrical cavity. Centrifugal force causes the larger liquid droplets to travel along the outer diameter of the cavity. The cavity surface is heated to cause the droplets to film boil. Film boiling reduces droplet contact with the cavity surface thereby retaining the solute in the droplets. The solute temperature is limited by controlling the pressure into which the solvent evaporates from the droplets.