A sampling unit includes a needle for aspirating a sample fluid, a housing, and a fitting. The needle includes a needle tip and a needle channel through the needle for guiding the aspirated sample fluid. The needle channel opens at the needle tip. The housing includes a housing cavity and a housing channel opening into the housing cavity. The fitting includes a fitting cavity and a fitting channel. The fitting is configured for sealingly receiving the needle tip into the fitting cavity and for being inserted into the housing cavity, so that the fitting channel on one side fluidically couples to the needle channel and on another side couples to the housing channel.

A sample injector for a chromatography system is configured for injecting a sample fluid into a mobile phase, and includes a needle and a conduit. The needle is configured for aspirating the sample fluid and includes a needle tip, a needle channel through the needle for guiding the aspirated sample fluid, and a needle opening at the needle tip into which the needle channel opens. The conduit is configured for fluidically coupling with the needle and includes a conduit tip, and a conduit channel through the conduit for guiding fluid and having a conduit opening at the conduit tip. The conduit tip and the needle tip are configured to be pressed against each other for fluidically coupling the conduit channel with the needle channel, with at least a portion of the conduit tip penetrating into the needle opening for providing the fluidic coupling between the conduit and needle channels.

The present invention addresses to an automated gas injection system in vials with rubber septa, for simultaneous injection of gas in 24 or more positions, with injection pressure control and/or overpressure detection, applied to mass spectrometry analyses and/or gas chromatography. The present invention can be used, for example, in isotopic analyses of geological materials in equipment with carbonate extraction units, in the cleaning and decontamination of tubes to be used in isotopic or chromatographic analyses, and in the removal of contaminants from steam drag or by continuous flow, or coming from the free space of vials or tubes in the analyses of organic and inorganic materials.

The application of this invention allows reducing the current times of routine purge (flush) of at very least 3 minutes for every 2 positions (72 positions in total and final time of 108 minutes, in a batch of samples) to a total of 96 positions in 3 minutes, with a reduction of 12 times or more in the flush time, which implies greater analytical capacity to the laboratory, lower external costs of sending samples, less time to obtain results, with technology that is easy to implement in universities and research centers in general, in addition to increasing the lifespan of rubber septa.

A sample injection device (100) includes a tubular suction and discharge unit (23) configured to suction a liquid sample (S), contain the sample therein, and discharge the suctioned sample, and at least a portion of an inner wall (23a) of the suction and discharge unit, the portion having the sample contained therewithin, is subjected to a surface treatment (V) to increase an interfacial tension (F) that acts between the inner wall and the sample.

A sample injection device (100) includes a tubular suction and discharge unit (23) configured to suction a liquid sample (S), contain the sample therein, and discharge the suctioned sample, and at least a portion of an inner wall (23a) of the suction and discharge unit, the portion having the sample contained therewithin, is subjected to a surface treatment (V) to increase an interfacial tension (F) that acts between the inner wall and the sample.

A particle detection device is provided. The particle detection device may include a substrate and at least one detection unit setting on the substrate. The at least one detection unit may include: a detection pool, configured to accommodate a sample liquid; a sample injection part communicating the detection pool, the sample injection part being sealable with a liquid driving device, wherein the liquid driving device and the sample injection part cooperate to enable the sample liquid to get in and out of the detection pool

A particle detection device is provided. The particle detection device may include a substrate and at least one detection unit setting on the substrate. The at least one detection unit may include: a detection pool, configured to accommodate a sample liquid; a sample injection part communicating the detection pool, the sample injection part being sealable with a liquid driving device, wherein the liquid driving device and the sample injection part cooperate to enable the sample liquid to get in and out of the detection pool

A septum contains at least one internal chamber along the central axis of the septum. The chamber provides relief space into which the sealing sections of the septum can deform as a needle passes through the septum. Incorporation of the chamber reduces surface area contact and friction between the septum and needle, which results in reduced septum tearing and reduced production of particulate matter from abrasion.

A septum contains at least one internal chamber along the central axis of the septum. The chamber provides relief space into which the sealing sections of the septum can deform as a needle passes through the septum. Incorporation of the chamber reduces surface area contact and friction between the septum and needle, which results in reduced septum tearing and reduced production of particulate matter from abrasion.

There are provided a sample cooling device capable of preventing air containing moisture from flowing into an accommodating chamber from outside the accommodating chamber, and of desirably dehumidifying air inside the accommodating chamber, and an autosampler provided with the same. Air is sent into an accommodating chamber 11 by a blower section 100 from outside the accommodating chamber 11 and the air is cooled by a dehumidifier section 13 to thereby cause dehumidified air to be supplied into the accommodating chamber 11. With the air sent into the accommodating chamber 11 by the blower section 100 from outside the accommodating chamber 11, the inside of the accommodating chamber 11 may be placed in a pressurized state. Since dehumidified air is supplied into the accommodating chamber 11 by air sent into the accommodating chamber 11 by the blower section 100 from outside the accommodating chamber 11 being cooled by the dehumidifier section 13, the humidity inside the accommodating chamber 11 may be prevented from rising due to the air that is sent from the blower section 100.