Abstract: A tuning system may acquire, from a mass spectrometer during a batch of one or more analytical runs performed with the mass spectrometer, tune data associated with an operating characteristic of the mass spectrometer. The tuning system may determine, based on the tune data, a value of an operating parameter configured to adjust the operating characteristic of the mass spectrometer and set the operating parameter to the determined value.

Abstract: An autosampler for dispensing samples is provided. The autosampler comprises a sample tray for holding the samples to be dispensed. The sample tray is moveable between a plurality of dispensing positions. The autosampler also comprises a noncontact coupling configured to move the sample tray between the plurality of dispensing positions. An autosampler for dispensing samples is also provided, comprising: a sample tray for holding the samples to be dispensed, the sample tray being moveable between a plurality of dispensing positions, the sample tray and a body of the autosampler comprising respective contact surfaces that contact each other as the sample tray moves between the plurality of dispensing positions, wherein the contact surface of at least one of the sample tray and the body of the autosampler comprises a self-lubricating material.

Abstract: A tuning system may acquire, from a mass spectrometer during a batch of one or more analytical runs performed with the mass spectrometer, tune data associated with an operating characteristic of the mass spectrometer. The tuning system may determine, based on the tune data, a value of an operating parameter configured to adjust the operating characteristic of the mass spectrometer and set the operating parameter to the determined value.

Abstract: A tuning system may acquire, from a mass spectrometer during a batch of one or more analytical runs performed with the mass spectrometer, tune data associated with an operating characteristic of the mass spectrometer. The tuning system may determine, based on the tune data, a value of an operating parameter configured to adjust the operating characteristic of the mass spectrometer and set the operating parameter to the determined value.

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: 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: This invention concerns an automatic sampler (AS) associable with two or more chromatographic analysis instruments (GC1, GC2, GCn), such as gas chromatographs for example, which can be interfaced with two or more separate data systems (DS1, DS2, DSn), each operating in an independent manner.

Abstract: The invention relates to a CO2-absorption device within an elemental analysis instrument, comprising at least one combustion reactor and one detector, connected by a pneumatic line for the gasses undergoing analysis emerging from the combustion reactor, along which said CO2-absorption device is arranged downstream of the combustion reactor and upstream of the detector. In order to accelerate the operational cycle and improve efficiency without excessive bulk, two regenerable CO2 filters, valve means for feeding the gasses undergoing analysis to one of said filters, alternating between one another for each analysis, and for supplying a regenerating flow of wash gas to the second filter, in the opposite direction with respect to the direction of flow of the gas undergoing analysis in the same filter are envisaged, as well as means for temporarily heating the filter during the regeneration stage.

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.

Abstract: The invention relates to a device for positioning and holding one or more chromatographic column lengths being subjected to one or more jets of fluid to change the temperature, especially in a modulator for GC×GC. The device comprises one or more V-shaped seats in which the column is housed, and pushed within the groove.

Abstract: The present invention relates to a device for washing samples that are intended to be introduced in an analysis apparatus, particularly for elemental analysis, which has a chamber sized such as to house only one sample at a time, means for feeding the samples, from a condition in contact with the ambient atmosphere, one at a time to said chamber, means for closing said sample-containing chamber relative to the environment, means for feeding and releasing a washing gas to and from said chamber, and means for opening this chamber to the analysis apparatus in sealed conditions relative to the atmosphere.

Abstract: This invention concerns an automatic sampler (AS) associable with two or more chromatographic analysis instruments (GC1, GC2, GCn), such as gas chromatographs for example, which can be interfaced with two or more separate data systems (DS1, DS2, DSn), each operating in an independent manner.

Abstract: Chromatography column assembly of the direct heating type, comprising at least a capillary column, at least a tubular structure which envelops the capillary column and is coaxial with it, means to directly heat the column, means to detect the temperature of the column and one or more electrically insulating covering elements, wherein the tubular structure comprises a plurality of tubular meshes each formed of a plurality of filaments woven together (FIG. 3).

Abstract: A direct-heating column assembly for chromatography, includes at least one capillary column and at least one element made of electrically conductive material in contact with the capillary column. The element includes a plurality of filaments woven together to form a tubular mesh that uniformly envelops the outer surface of the capillary column both in radial and longitudinal directions.

Abstract: The invention relates to a device for positioning and holding one or more chromatographic column lengths being subjected to one or more jets of fluid to change the temperature, especially in a modulator for GC×GC. The device comprises one or more V-shaped seats in which the column is housed, and pushed within the groove.

Abstract: A method for detecting substances or mixtures of substances within a sample in an apparatus for comprehensive two-dimensional gas-chromatographic analysis according to the present invention, comprising the steps of: subjecting the sample to a first separation within a first capillary column; modulating in time the effluents from the first column by means of the subdivision into adjacent fractions of the effluents from the first column and subsequently sending each fraction into a second capillary column, the modulation of the effluents being periodic with a first modulation frequency f1 of the sample; separating each of the fractions in the aforesaid second capillary column; and detecting, at the end of the second capillary column, the effluents by means of periodic sampling by discrete time points at a second frequency f2.

Abstract: Chromatography column assembly of the direct heating type, comprising at least a capillary column, at least a tubular structure which envelops the capillary column and is coaxial with it, means to directly heat the column, means to detect the temperature of the column and one or more electrically insulating covering elements, wherein the tubular structure comprises a plurality of tubular meshes each formed of a plurality of filaments woven together (FIG. 3).

Abstract: This invention relates to a modulator for use in gas chromatographic analyses, in particular for comprehensive two-dimensional gas chromatography, adapted to alternatively trap and release fractions of solutes in a length of a capillary column within a chromatographic oven, of the type comprising one nozzle placed to spray one jet in one corresponding capillary column section along said capillary column length, said nozzle being connected to a source of liquid CO2 and means for alternatively causing a jet of gaseous CO2 to impinge during a predetermined time on said capillary column section and to leave the oven atmosphere to heal said capillary column section after said predetermined time. By controlling said capillary column section cooling time by the single jet and said column section heating time by the oven atmosphere in each modulation cycle comprising a heating time and a cooling time a perfect modulation of the sample fractions can be ontained.

Abstract: A method for detecting substances or mixtures of substances within a sample in an apparatus for comprehensive two-dimensional gas-chromatographic analysis according to the present invention, comprising the steps of:

Abstract: Elemental analysis of a sample is carried out in an oxygen atmosphere in a combustion reactor and the volume of oxygen required for analysis is determined by means of the algorithm Qo=&Dgr;(Qc)  [1] where Qo is the volume of oxygen required and Qc is the weight of the sample to be analyzed and &Dgr;=Qo1/Qc1 where Qo1 is the volume of oxygen necessary for the combustion of a predetermined quantity Qc1 of the sample to be analyzed, the volume of oxygen Qo is then fed in pulsed mode to the combustion reactor, by means of a flow detector.