Abstract: An instrument including a chromatographic column with a final detector and a mass spectrometer. A temperature of an interface including an output tube and a capillary tube adjusting the flow to the spectrometer is adjusted using a leakage flow or pressure sensor outputting data to a control module that adjusts the interface temperature to equalize flows in the tubes.

Abstract: An instrument including a chromatographic column with a final detector and a mass spectrometer. A temperature of an interface including an output tube and a capillary tube adjusting the flow to the spectrometer is adjusted using a leakage flow or pressure sensor outputting data to a control module that adjusts the interface temperature to equalize flows in the tubes.

Abstract: A coupling device connecting the output of a microchromatograph (?CG) to the input of a mass spectrometer (MS), said coupling device comprising a capillary tube with one end connected in sealed fashion to the source under vacuum of the mass spectrometer through the intermediary of an interface device, and with the other end connected to the output of the microchromatograph, in slack fashion, open to the atmosphere; the length and the diameter of the capillary tube being chosen such that the flow rate inside the capillary tube is very close to the flow rate at the output from the microchromatograph; the interface device being, furthermore, provided with heating means for very precise adjustment of the flow rate registered by the capillary.

Abstract: Said device comprises a substantially tubular mixing chamber (1), a first inlet orifice for a stream (4) of the first gas at one end (2) of said chamber, a second inlet orifice (6) for a stream of the second gas, located downstream of said first orifice in the direction of flow of the stream of the first gas, means (10) for homogeneously mixing said streams of the first and second gases, said means being located downstream of said second inlet orifice, an outlet orifice (3) for the mixture, located downstream of said mixing means (10), at the other end of said chamber, and an orifice (11) for sampling said mixture of the first and second gases, said orifice being located between said mixing means (10) and said outlet means (3) for the mixture, said device furthermore including means (5, 8, 9) for sending the stream of the first gas into said chamber with a controlled flow rate and for sending the stream of the second gas into said chamber with a controlled flow rate.

Abstract: A coupling device connecting the output of a microchromatograph (&mgr;CG) to the input of a mass spectrometer (SM), said coupling device comprising a capillary tube with one end connected in sealed fashion to the source under vacuum of the mass spectrometer through the intermediary of an interface device, and with the other end connected to the output of the microchromatograph, in slack fashion, open to the atmosphere; the length and the diameter of the capillary tube being chosen such that the flow rate inside the capillary tube is very close to the flow rate at the output from the microchromatograph; the interface device being, furthermore, provided with heating means for very precise adjustment of the flow rate registered by the capillary.