In a preparative liquid chromatograph, a control device for controlling at least operation of a sample injection part includes a holding part for holding a chromatogram-for-setting created in advance for a sample to be analyzed, and an injection program creating part configured to create an injection program that defines timings at which injection operations are executed based on the chromatogram-for-setting, so that, in the case where the number of injections in a multiple injection mode is set, a peak of a chromatogram of the sample to be analyzed injected in each injection operation does not overlap a peak of a chromatogram of the sample to be analyzed injected in another injection operation.

An odor evaluation device, including: a gas chromatograph including a separation column configured to temporally separate a plurality of components contained in an odoriferous analysis-target gas; a timing detector configured to detect, for each of the plurality of components, a timing at which the component exits from the separation column; a gas collector configured to collect, into a sample bag, a gas containing all or some of the components exiting from the separation column when the analysis-target gas is passed through the separation column; a timing setter configured to allow a setting of a timing at which a component contained in the gas to be collected into the sample bag exits from the separation column; and a gas introducer configured to introduce a dilution gas into a passage connecting the separation column and the sample bag.

A fraction collector (14) that is provided downstream of a detector (10) and for separating an eluate eluted from a separation column (8) into a plurality of parts and collecting each of the parts into a plurality of containers respectively, and a controller (16) configured to execute fractionation operation for each sample injected at one time into the mobile phase are provided. In the fractionation operation, the controller detects components separated from each other in the separation column (8) as peaks individually based on a signal output from the detector (10), and controls operation of the fraction collector (14) such that the components detected as the peaks are collected in different containers. The controller (16) is configured to set a reference number of the number of components in a sample injected into the mobile phase, to count the number of components detected as the peaks for each sample injected into the mobile phase at a time by the injector (6), and to determine that the fractionation operation of the sample is completed when the number of components counted reaches the reference number and all components as many as the reference number are collected in the container.

A preparative chromatograph system includes a sample injector (10) that injects a sample into a separation flow path (8) through which a mobile phase flows, a separation column (12) that is provided on the separation flow path (8) and is to separate a sample injected into the separation flow path (8) into components, a detector (14) that is provided at a position farther downstream than the separation column (12) on the separation flow path (8) and is to detect sample components obtained by separation in the separation column (12), a collector (18, 18′) having a plurality of collection containers (22) for collecting part of an eluate eluted from the separation column (12) and a switch mechanism (20, 30, 32) configured to be capable of selectively connecting a downstream end of the separation flow path (8) to any one of the collection containers (22), a collection setter (26) configured to set a portion, to be collected in each of the collection containers (22), of an eluate eluted from the separation column (12) using a pre-acquired chromatogram of a sample, and a collection setter (26) configured to be capable of setting a portion, including a sample component, of an eluate eluted from the separation column (12), and a portion, between two sample components that are adjacent to each other on the chromatogram, of an eluate eluted from the separation column (12), as the portion to be collected, and a controller (28) configured to control an operation of the switch mechanism (20, 30, 32) of the collector (18, 18′) and collect the portion, which is to be collected and is set by the connection setter (26), in the predetermined collection container (22).

A liquid chromatography separation system includes a separator, a collector, a switch valve and a collection controller. The collector has at least one sample loop and connects the sample loop to a position farther downstream than the separator and collect an eluate including a desired sample component among sample components obtained by separation in the separator in the sample loop. The switch valve switches between a state in which the separator is connected the sample loop and a state in which the separator is not connected to the sample loop. The collection controller is configured to control an operation of switching the switch valve and collect a predetermined amount, which is equal to or smaller than a volume of the sample loop, of an eluate including a desired sample component obtained by separation in the separator in the sample loop from a peak-beginning point of the sample component.

A liquid chromatography separation system includes a separator, a collector, a switch valve and a collection controller. The collector has at least one sample loop and connects the sample loop to a position farther downstream than the separator and collect an eluate including a desired sample component among sample components obtained by separation in the separator in the sample loop. The switch valve switches between a state in which the separator is connected the sample loop and a state in which the separator is not connected to the sample loop. The collection controller is configured to control an operation of switching the switch valve and collect a predetermined amount, which is equal to or smaller than a volume of the sample loop, of an eluate including a desired sample component obtained by separation in the separator in the sample loop from a peak-beginning point of the sample component.

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).

In a chromatograph, a mobile phase is supplied to any of a plurality of columns by a mobile phase supplier, and a sample is supplied to the column by a sample supplier. The sample that has passed through the column is detected by a detector. In a chromatographic control device, a flow rate of the mobile phase for the analysis with use of the column is registered by a flow rate registrar in association with column specifying information for specifying each column. The flow rate of the mobile phase registered in association with a selected column is acquired from registered content of the flow rate registrar. The chromatograph is controlled such that the analysis is performed by an analysis controller while the mobile phase is supplied to the selected column with use of the selected column and the flow rate of the mobile phase acquired by a flow rate acquirer.

In a chromatograph, a mobile phase is supplied to any of a plurality of columns by a mobile phase supplier, and a sample is supplied to the column by a sample supplier. The sample that has passed through the column is detected by a detector. In a chromatographic control device, a flow rate of the mobile phase for the analysis with use of the column is registered by a flow rate registrar in association with column specifying information for specifying each column. The flow rate of the mobile phase registered in association with a selected column is acquired from registered content of the flow rate registrar. The chromatograph is controlled such that the analysis is performed by an analysis controller while the mobile phase is supplied to the selected column with use of the selected column and the flow rate of the mobile phase acquired by a flow rate acquirer.

A fraction collector control device includes a peak designation part that displays a chromatogram for setting and requires a user to select at least one peak in the chromatogram for setting, a parameter extraction part that extracts, as a parameter, a signal level and/or a slope at a start point and an end point of each peak designated by a user, and a threshold candidate generation part that generates, based on the parameter extracted by the parameter extraction part, a threshold candidate usable as a common threshold for detecting start points of all peaks designated by a user and a common threshold for detecting end points of all peaks designated by a user.