A fluid modulator includes a fluid manifold, fluid valve, and pressure/flow controller. The manifold may include a primary tee, exhaust tee, secondary tee, loop conduit, and joining tube. The valve may include a common port, normally-open output port connected to the secondary tee, and normally-closed output port connected to the primary tee. The controller may be configured to provide auxiliary fluid to the common port. In embodiments, the primary tee, exhaust tee, and secondary tee are configured with the primary tee and secondary tee situated at ends of the fluid manifold and the exhaust tee disposed therebetween. In other embodiments, the exhaust tee, the primary tee, and the secondary tee are distributed in a linear fashion with the exhaust tee and secondary tee situated at ends of the fluid manifold and the primary tee disposed therebetween. An embodiment with a single, unitary 5-port fluid manifold is also disclosed.

A fluid modulator includes a fluid manifold, fluid valve, and pressure/flow controller. The manifold may include a primary tee, exhaust tee, secondary tee, loop conduit, and joining tube. The valve may include a common port, normally-open output port connected to the secondary tee, and normally-closed output port connected to the primary tee. The controller may be configured to provide auxiliary fluid to the common port. In embodiments, the primary tee, exhaust tee, and secondary tee are configured with the primary tee and secondary tee situated at ends of the fluid manifold and the exhaust tee disposed therebetween. In other embodiments, the exhaust tee, the primary tee, and the secondary tee are distributed in a linear fashion with the exhaust tee and secondary tee situated at ends of the fluid manifold and the primary tee disposed therebetween. An embodiment with a single, unitary 5-port fluid manifold is also disclosed.

A gas chromatograph that includes a metering chamber, two separating devices and a multiport valve unit having switching functions for metering, straight separation, cutting and backflush, where the multiport valve unit is formed as a multiport diaphragm valve.

A gas chromatograph that includes a metering chamber, two separating devices and a multiport valve unit having switching functions for metering, straight separation, cutting and backflush, where the multiport valve unit is formed as a multiport diaphragm valve.

A trace detection device including: an ion mobility tube ; a sampling gas path module ; a sample injection gas path module configured to introduce a sample carrier gas containing a sample collected by the sampling gas path module toward the ion mobility tube; and a gas chromatography apparatus capable of pre-separating the sample carrier gas, so as to form a pre-separated sample carrier gas; wherein the sample injection gas path module is further configured to be capable of switching between a first mode and a second mode, in the first mode, the sample injection gas path module introduces the sample carrier gas into the ion mobility tube; and in the second mode, the sample injection gas path module introduces the sample carrier gas into the gas chromatography apparatus to pre-separate the sample carrier gas, and the pre-separated sample carrier gas is introduced into the ion mobility tube.

A trace detection device including: an ion mobility tube ; a sampling gas path module ; a sample injection gas path module configured to introduce a sample carrier gas containing a sample collected by the sampling gas path module toward the ion mobility tube; and a gas chromatography apparatus capable of pre-separating the sample carrier gas, so as to form a pre-separated sample carrier gas; wherein the sample injection gas path module is further configured to be capable of switching between a first mode and a second mode, in the first mode, the sample injection gas path module introduces the sample carrier gas into the ion mobility tube; and in the second mode, the sample injection gas path module introduces the sample carrier gas into the gas chromatography apparatus to pre-separate the sample carrier gas, and the pre-separated sample carrier gas is introduced into the ion mobility tube.

Provided are an odor sniffing device (11) and a vehicle-mounted security inspection apparatus for a container (1). The odor sniffing device (11) includes a primary sampling front end (116), which has a vent adapter (116-1) having a shape matching with a vent of the ventilator of the container, so that when the primary sampling front end (116) fits with the ventilator, the vent adapter (116-1) and the vent generally cooperate to achieve fluid communication. The vehicle-mounted security inspection apparatus (1) may perform imaging inspection and chemical inspection simultaneously.

Provided are an odor sniffing device (11) and a vehicle-mounted security inspection apparatus for a container (1). The odor sniffing device (11) includes a primary sampling front end (116), which has a vent adapter (116-1) having a shape matching with a vent of the ventilator of the container, so that when the primary sampling front end (116) fits with the ventilator, the vent adapter (116-1) and the vent generally cooperate to achieve fluid communication. The vehicle-mounted security inspection apparatus (1) may perform imaging inspection and chemical inspection simultaneously.

A chromatography system comprising at least two pumps, a first pump which is connectable or connected with a liquid reservoir for a first fluid, and a second pump which is connectable or connected with a liquid reservoir for a second fluid, wherein the pump outlet lines from the first pump and the second pump are connected with a connection piece and, viewed in the direction of flow, a chromatography column is provided downstream of this connection piece, wherein, viewed in the direction of flow, an addition unit is provided upstream of the connection piece and a mixer switching valve and a mixer switchable by way of the mixer switching valve are provided between the connection piece and chromatography column, wherein the mixer switching valve has at least two switching positions, wherein the mixer is connectable in a first position and the mixer is bypassable in a second position.

A chromatography method in which the system is used and a conversion kit for converting a high-performance liquid chromatography system into a chromatography system for supercritical fluid chromatography are also disclosed.

A chromatography system comprising at least two pumps, a first pump which is connectable or connected with a liquid reservoir for a first fluid, and a second pump which is connectable or connected with a liquid reservoir for a second fluid, wherein the pump outlet lines from the first pump and the second pump are connected with a connection piece and, viewed in the direction of flow, a chromatography column is provided downstream of this connection piece, wherein, viewed in the direction of flow, an addition unit is provided upstream of the connection piece and a mixer switching valve and a mixer switchable by way of the mixer switching valve are provided between the connection piece and chromatography column, wherein the mixer switching valve has at least two switching positions, wherein the mixer is connectable in a first position and the mixer is bypassable in a second position.

A chromatography method in which the system is used and a conversion kit for converting a high-performance liquid chromatography system into a chromatography system for supercritical fluid chromatography are also disclosed.