Abstract: The invention concerns a method for preparing a sample to be introduced in a chromatographic analysis system from the headspace of a vial, by introducing a pressurized inert gas in said headspace, controlling the pressure or flow, and subsequently by discharging said pressure from the headspace through a loop having constant volume and through a discharge duct provided with a valve, the discharge duct branching with respect to the feed duct. To eliminate the drawbacks of the known methods, during the step of discharging the pressure, the feed duct is kept open and the pressure in said loop is controlled by detecting the feed and/or discharge pressure.

Abstract: Process for sampling the headspace, comprising the steps of: (i) preparing a container (1) containing a substance in the liquid phase (2), a substance in the gaseous phase (3), a substance to be analyzed (4) initially at least partially contained in the substance in the liquid phase (2), wherein the substance in the liquid phase (2) has a contact surface (S) contacting the substance in the gaseous phase; (ii) constraining said container (1) to a supporting element (10) rotatable around a rotation axis (A1); (iii) rotating said supporting element (10) at such an angular velocity to tilt said contact surface (S) by an angle (a) of at least 20 degrees with respect to a plane (H) parallel to the bearing surface of the supporting element (10); (iv) stopping the rotation of said supporting element (10); (v) collecting a sample of the substance to be analyzed, in the gaseous phase.

Abstract: The invention concerns a method for preparing a sample to be introduced in a chromatographic analysis system from the headspace of a vial, by introducing a pressurized inert gas in said headspace, controlling the pressure or flow, and subsequently by discharging said pressure from the headspace through a loop having constant volume and through a discharge duct provided with a valve, the discharge duct branching with respect to the feed duct. To eliminate the drawbacks of the known methods, during the step of discharging the pressure, the feed duct is kept open and the pressure in said loop is controlled by detecting the feed and/or discharge pressure.

Abstract: The invention relates to a vaporization injector for a gas chromatograph, said injector comprising a structure (11) mounted in a detachable manner on the gas chromatograph body and including the sample introduction means, the vaporization chamber and pneumatic connections for feeding the carrier gas to the vaporization chamber and to the septum purge means, as well as pneumatic connections for evacuating the splitted sample and carrier gases.

Abstract: This invention is related to a gas chromatograph wherein more substitutable modules are foreseen, in particular injector modules and/or detector modules, as well as one embodiment in an oven module. Each module is insertable in a seat of the gas chromatograph mainframe with fast connections of its electronic and pneumatic means to corresponding outlets on said mainframe. Each module has its own heating element.

Abstract: The invention relates to a vaporization injector for a gas chromatograph, said injector comprising a structure (11) mounted in a detachable manner on the gas chromatograph body and including the sample introduction means, the vaporization chamber and pneumatic connections for feeding the carrier gas to the vaporization chamber and to the septum purge means, as well as pneumatic connections for evacuating the splitted sample and carrier gases.

Abstract: This invention is related to a gas chromatograph wherein more substitutable modules are foreseen, in particular injector modules and/or detector modules, as well as one embodiment in an oven module. Each module is insertable in a seat of the gas chromatograph mainframe with fast connections of its electronic and pneumatic means to corresponding outlets on said mainframe. Each module has its own heating element.

Abstract: The invention concerns a device for washing the injector in a liquid chromatography equipment, comprising a sealed passage for the injection needle and, upstream, a mobile valve for alternatively connecting said passage with the outside for introduction of the needle, or with at least one source of washing fluid.