Gas analysis system
A gas analysis system includes a first column, a second column, a merge portion connected to an outlet of the first column and an outlet of the second column, a detector that detects a gas component introduced from the merge portion, a switching valve arranged between the first column and the merge portion, and a controller. The controller performs delay processing of switching the switching valve between open and closed states so that timing of start of introduction of the gas component separated in the first column into the detector is delayed to be later than timing of completion of introduction of the gas component separated in the second column into the detector.
1 . A gas analysis system comprising:
a first column that separates a gas component contained in sample gas;
a second column that separates a gas component contained in the sample gas;
a detector that detects the gas components introduced from the first column and the second column;
a valve that switches gas introduction from the first column into the detector;
a controller that performs delay processing of switching the valve between open and closed states so that timing of start of introduction of the gas component separated in the first column into the detector is delayed to be later than timing of completion of introduction of the gas component separated in the second column into the detector, and
a switching module arranged between the first column and the second column, the switching module being configured to switch between a serial state in which the first column and the second column are connected in series in this order to the detector and a parallel state in which the first column and the second column are connected in parallel to the detector,
wherein the first column is a column for primary separation,
wherein the second column is a column for secondary separation for further separation of the gas component primarily separated in the first column, and
wherein the controller performs the delay processing when the switching module is in the parallel state.
2 . The gas analysis system according to claim 1 , wherein
in the delay processing, the controller controls the valve to close to enclose in the first column, the gas component separated in the first column while the gas component separated in the second column is being introduced into the detector.
3 . The gas analysis system according to claim 2 , wherein
the controller controls the valve to open to introduce the gas component separated in the first column into the detector after the controller performs the delay processing.
4 . The gas analysis system according to claim 1 , wherein the valve includes
a base portion provided with a flow inlet for introduction of gas into inside and a flow outlet for flow of gas introduced from the flow inlet to outside, and
a diaphragm portion arranged as being opposed to the base portion, the diaphragm portion elastically deforming to switch between flow and cut-off of gas from the flow inlet to the flow outlet.
5 . The gas analysis system according to claim 4 , wherein
the first column is a capillary column.
6 . The gas analysis system according to claim 1 , further comprising:
a merge portion connected to an outlet of the first column and an outlet of the second column,
wherein the detector detects any one of the gas components introduced from the merge portion.