A preparative closed cycle supercritical fluid column chromatography system, device, and method of isolating high volumes of pure components from mixtures using a supercritical solvent. Bulk fractions of desirable material from plants can be obtained using supercritical fluid column chromatography with a chromatography column. A chemical sensor downstream the chromatography column detects chemical species eluted from the column and a plurality of collection columns collects the bulk fractions of product with a control system controlling the collection valves based on detection of chemical species at the chemical sensor.

A method for fraction collection and a fraction collection system (100) comprising: —a dispensing device (23) including an outlet (24) configured for dispensing fractions of a liquid received from a connected system; —plural receptacles (25) configured for receiving one or more of said fractions, wherein the receptacles (25) and the dispensing device (23) are movable in relation to each other into a number of different positions such that the dispensing device (23) is capable of dispensing a respective fraction of said liquid into one or more of the receptacles (25); —a waste collection device (27), which is arranged in the fraction collection system (100) such that it is movable into at least a first and a second position wherein, in said first position, an inlet (29) of the waste collection device (27) is positioned below the outlet (24) of the dispensing device (23) such that liquid being dispensed from the outlet (24) of the dispensing device (23) is received in the waste collection device (27) and wherein, in the second position, the inlet (29) of the waste collection device (27) is not positioned below the outlet (24) of the dispensing device (23) such that fractions being dispensed from the dispensing device (23) can be received in one or more of the receptacles (25).

A method for fraction collection and a fraction collection system (100) comprising: —a dispensing device (23) including an outlet (24) configured for dispensing fractions of a liquid received from a connected system; —plural receptacles (25) configured for receiving one or more of said fractions, wherein the receptacles (25) and the dispensing device (23) are movable in relation to each other into a number of different positions such that the dispensing device (23) is capable of dispensing a respective fraction of said liquid into one or more of the receptacles (25); —a waste collection device (27), which is arranged in the fraction collection system (100) such that it is movable into at least a first and a second position wherein, in said first position, an inlet (29) of the waste collection device (27) is positioned below the outlet (24) of the dispensing device (23) such that liquid being dispensed from the outlet (24) of the dispensing device (23) is received in the waste collection device (27) and wherein, in the second position, the inlet (29) of the waste collection device (27) is not positioned below the outlet (24) of the dispensing device (23) such that fractions being dispensed from the dispensing device (23) can be received in one or more of the receptacles (25).

Described are a fraction collector and a method of fraction collection for a liquid chromatography system. The method includes diverting a liquid chromatography system flow from a waste channel to a collection tube at a start of a fraction collection window and collecting the system flow dispensed from the collection tube during the fraction collection window. At the end of the window, the system flow is diverted to the waste channel and a flow of a wash solvent is provided to the collection tube to dispense liquid remaining in the collection tube at the end of the window from the collection tube. The method can increase the amount of the collected fraction and can reduce or eliminate cross-contamination of a subsequently collected fraction. The method is useful for analytical scale applications where the collected fractions may have volumes defined by a limited number of drops dispensed from the collection tube.

A preparative liquid chromatograph includes a liquid chromatograph section, a trap section, an eluent supply section, a collector, and a flow path switching section. The flow path switching section is configured to be selectively switched to a component trap mode that connects the liquid chromatograph section and the trap section in such a way that a sample component separated in a separation column is trapped by a trap column of the trap section; and a collection mode that connects the eluent supply section and the trap section and connects the trap section and the collector in such a way that the components trapped in the trap column are eluted by an eluent from the eluent supply section and are guided to the collector.

The invention relates to a fraction collector apparatus (100) comprising: a support system (1, 2), a carrier (42) moveably supported by the support system (1, 2), an extension arm (3) connected to the carrier (42), at least one dispensing head (31) for dispensing droplets and moveably connected to the extension arm (3), wherein the dispensing head (31) and (carrier 42) are configured to move relative to the support system in a first plane, a tray area (11) designed to support at least one rack (6, 7), wherein the at least one rack (6, 7) is designed to hold at least one collection vessel (12, 14), wherein motion of said carrier (42) is achieved by a linear bearing Y-slide unit (41) wherein the linear bearing Y-slide unit (41) is arranged underneath a linear bearing Y-rail (40) and wherein the carrier (42) is attached to the linear bearing Y-slide unit (41).

Example implementations relate to techniques for thermal fluid conditioning and delivery. A technique may involve coupling a container of heat transfer fluid to an input and removing moisture from the heat transfer fluid via a molecular sieve. A pressure source is configured to push the heat transfer fluid out of the container and through the molecular sieve. Subsequent to removing the moisture from the heat transfer fluid, the technique involves separating, via an orifice coupled to a tank, the heat transfer fluid into liquid and gas particles within the tank and removing, via a vacuum coupled to the tank, the gas particles from the tank. The liquid can then be supplied into a fluid system via additional pressure by the pressure source. The technique may be performed by a portable device that houses the various components used to condition and delivery the thermal fluid.

Example implementations relate to techniques for thermal fluid conditioning and delivery. A technique may involve coupling a container of heat transfer fluid to an input and removing moisture from the heat transfer fluid via a molecular sieve. A pressure source is configured to push the heat transfer fluid out of the container and through the molecular sieve. Subsequent to removing the moisture from the heat transfer fluid, the technique involves separating, via an orifice coupled to a tank, the heat transfer fluid into liquid and gas particles within the tank and removing, via a vacuum coupled to the tank, the gas particles from the tank. The liquid can then be supplied into a fluid system via additional pressure by the pressure source. The technique may be performed by a portable device that houses the various components used to condition and delivery the thermal fluid.

Detection and identification of microbial species uses liquid chromatography as a bulk filtration process for rapid isolation and collection of microbial RNA from a biological specimen. In various embodiments, gene sequencing of microbial RNA molecules from a biological specimen is enhanced by obtaining and then preparing the biological specimen as a test sample for liquid chromatography that is used to bulk filter microbial RNA molecules from a mixture of RNA molecules in the test sample to isolate and collect the microbial RNA molecules in two or more fraction outputs, wherein at least one of the two or more fraction outputs is a fraction within a void volume of the liquid chromatography, preparing one or more fraction outputs for gene sequencing, including the fraction output that is within the void volume, and conducting gene sequencing on the one or more prepared outputs to detect microbial RNA from the biological specimen.

Detection and identification of microbial species uses liquid chromatography as a bulk filtration process for rapid isolation and collection of microbial RNA from a biological specimen. In various embodiments, gene sequencing of microbial RNA molecules from a biological specimen is enhanced by obtaining and then preparing the biological specimen as a test sample for liquid chromatography that is used to bulk filter microbial RNA molecules from a mixture of RNA molecules in the test sample to isolate and collect the microbial RNA molecules in two or more fraction outputs, wherein at least one of the two or more fraction outputs is a fraction within a void volume of the liquid chromatography, preparing one or more fraction outputs for gene sequencing, including the fraction output that is within the void volume, and conducting gene sequencing on the one or more prepared outputs to detect microbial RNA from the biological specimen.