Analysis system

Abstract

An analysis system (100) comprises: a spectrophotometer (1) that exposes a sample gas to light and acquires a spectrum derived from the components of the sample gas; a chromatograph (3) that separates the components of the sample gas in a column (31) and performs quantitative analysis of a target component to be analyzed; a first flow path (61) that connects the spectrophotometer (1) and the chromatograph (3); a second flow path (62) that has one end connected to the spectrophotometer (1) and the other end opened to the outside; a switching valve (5) that switches between whether the spectrophotometer (1) is connected to the first flow path (61) or the second flow path (62); and a control device (9) that controls the switching valve (5). The control device (9) determines based on the spectrum whether or not to perform quantitative analysis in the chromatograph.

Description

Analysis System

[0001] The present disclosure relates to an analysis system.

[0002] In recent years, in order to create clean energy to achieve carbon neutrality, greenhouse gases such as CO2 have been used. ２ Development is underway to produce synthetic fuels using these materials and to develop technologies for converting bio-based raw materials into fuel.

[0003] In this development, either an infrared spectrophotometer or a gas chromatograph is often used to measure sample gases such as biomaterials and synthetic fuels.

[0004] For example, US Pat. No. 1,122,5611 (Patent Document 1) discloses a technique for using a spectrophotometer to monitor the conversion of bio-feedstocks for the production of hydrocarbon fuels.

[0005] U.S. Patent No. 1,122,5611

[0006] However, while spectrophotometers allow for rapid measurements, they are susceptible to interference from contaminants and atmospheric conditions, making them unsuitable for detailed quantitative analysis.

[0007] On the other hand, while gas chromatography offers high quantitative accuracy, its long measurement time makes it unsuitable for continuous monitoring of sample gases.

[0008] Therefore, users had to choose between quantitative accuracy and continuous monitoring, and give up the other.

[0009] The present disclosure has been made to solve such problems, and its purpose is to provide an analytical system that can continuously monitor sample gas and perform highly accurate quantification as needed.

[0010] A first aspect of the present invention is an analytical system comprising: a spectrophotometer that irradiates a sample gas with light to obtain a spectrum derived from the components of the sample gas; a chromatograph that separates the components of the sample gas using a column to perform quantitative analysis of the target component to be analyzed; a first channel connecting the spectrophotometer and the chromatograph; a second channel connected at one end to the spectrophotometer and open to the outside at the other end; a switching valve that switches whether the spectrophotometer is connected to the first channel or the second channel; and a control device that controls the switching valve. The control device determines whether or not to perform quantitative analysis in the chromatograph based on the spectrum.

[0011] According to the present disclosure, an analytical system can be provided that can continuously monitor sample gas and perform highly accurate quantification as needed.

[0012] This is a schematic diagram of the analysis system according to Embodiment 1. This is a diagram showing an example of the analysis results from a spectrophotometer. This is a diagram showing an example of the analysis results from a gas chromatograph. This is a schematic diagram of the analysis system according to Embodiment 2.

[0013] Embodiments of the present invention will be described in detail below with reference to the drawings. Note that identical or corresponding parts in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated.

[0014] 1. Configuration of Analysis System According to First Embodiment FIG. 1 is a schematic configuration diagram of an analysis system 100 according to the first embodiment.

[0015] The analysis system 100 monitors the components of the sample gas by performing online analysis, which analyzes the components of the sample gas as it is continuously introduced. In this specification, continuous analysis includes, for example, cases where the analysis is repeatedly performed at relatively short time intervals of about one minute or less.

[0016] The analysis system 100 is used, for example, to evaluate catalytic reaction efficiency, to evaluate the decomposition efficiency and / or performance of harmful gases, and to monitor and / or evaluate hydrogen reactions of gas components. In one embodiment, the analysis system 100 is used for developing efficient chemical reactions using catalysts for the efficient production of synthetic fuels.

[0017] The analysis system 100 includes a spectrophotometer 1, a gas chromatograph 3, a switching valve 5, first to third flow channels 61 to 63, and a gas supply unit 7. The spectrophotometer 1 and the gas chromatograph 3 are connected in series via the first flow channel 61.

[0018] A sample gas is continuously supplied to the spectrophotometer 1. The sample gas contains the target component to be analyzed and components that are not to be analyzed (impurities). In one embodiment, the spectrophotometer 1 is connected to the sample gas supply source by piping.

[0019] The spectrophotometer 1 irradiates the sample gas with light and acquires a spectrum derived from the components of the sample gas.

[0020] In one embodiment, the spectrophotometer 1 is an FT-IR spectrometer and includes, in addition to the gas cell 11, an infrared light source, an interferometer, a detector, and a first control unit (all not shown). The interferometer generates interfering infrared light from infrared light generated by the infrared light source. The interfering infrared light emitted from the interferometer is irradiated onto the sample gas in the gas cell. Light emitted from the sample gas as a result of this irradiation is incident on the detector, and a spectrum is generated in the first control unit based on the light detection signal from the detector. The first control unit is also a unit that controls the entire spectrophotometer 1 and is, for example, a computer. Note that instead of providing the first control unit, the functions of the first control unit may be performed by the control device 9.

[0021] Fig. 2 shows an example of the analysis results (spectrum) of the spectrophotometer 1. In the graph of Fig. 2, the horizontal axis represents the wave number of the emission line, and the vertical axis represents the absorbance. The wave number is the number of waves contained per unit length (1 cm), and is the reciprocal of the wavelength. By using the spectrophotometer 1, a spectrum like that shown in Fig. 2 can be obtained in one minute or less.

[0022] Spectrophotometer 1 performs non-separation analysis, where multiple components are analyzed together without necessarily separating them from each other. Specifically, the absorbance from a sample gas containing multiple components is obtained as a single spectrum. In the spectrum, one component (for example, CO) is analyzed together. ２) one or more peaks are detected. Relatedly, multiple peaks resulting from multiple components may overlap with each other. This is one reason why the quantitative capability of spectrophotometer 1 is lower than that of a chromatograph (e.g., gas chromatograph 3 or liquid chromatograph 3A) that separates and analyzes multiple components. As described above, spectrophotometer 1 is capable of qualitative analysis to confirm the presence or absence of a specific component. More specifically, spectrophotometer 1 may sometimes be capable of roughly quantitative analysis of a specific component, but with lower accuracy than a chromatograph.

[0023] The first flow path 61 is a flow path that connects the spectrophotometer 1 and the gas chromatograph 3. One end of the second flow path 62 is connected to the spectrophotometer 1, and the other end is open to the outside.

[0024] The switching valve 5 switches whether the spectrophotometer 1 is connected to the first flow path 61 or the second flow path 62 .

[0025] In one embodiment, the switching valve 5 is connected to one end of a third flow path 63, the other end of which is connected to the sample gas outlet of the spectrophotometer 1, and is also connected to one end of the first flow path 61 and one end of the second flow path 62. The switching valve 5 is controlled by the control device 9 to switch whether the third flow path 63 is connected to the first flow path 61 or the second flow path 62.

[0026] The gas chromatograph 3 separates the components of the sample gas in a column 31 and performs quantitative analysis of the target components to be analyzed.

[0027] More specifically, the gas chromatograph 3 includes a sample injection section 32, a column 31, a detection section 33, and a second control unit (not shown). Components of the sample gas injected from the sample injection section 32 are separated in the column 31, and the separated components are detected by the detection section 33, thereby generating a gas chromatogram in the second control unit. The second control unit is also a unit that controls the entire gas chromatograph 3, and is, for example, a computer. Note that instead of providing a second control unit, the functions of the second control unit may be performed by the control device 9.

[0028] Figure 3 shows an example of the analysis results (chromatogram) from gas chromatograph 3. In the graph in Figure 3, the horizontal axis represents the time (minutes) it took for the components to elute from the column, and the vertical axis represents the signal intensity. The horizontal axis correlates with the rate at which each component passes through the column.

[0029] In gas chromatograph 3, separation analysis is performed, in which multiple components are separated from each other before analysis. Specifically, multiple components in the sample gas are separated by the difference in the speed at which they pass through column 31, and a chromatogram is obtained that contains peaks that correspond one-to-one with each separated component. In other words, in the chromatogram, the signal intensity of a given peak reflects the amount of the corresponding given component. Therefore, quantitative analysis is possible with gas chromatograph 3, and more specifically, quantitative analysis with higher accuracy than spectrophotometer 1 is possible. On the other hand, in gas chromatograph 3, the analysis time is longer than with spectrophotometer 1 because it takes time to separate the components in column 31. For example, while a spectrum can be obtained in less than one minute with a spectrophotometer, it takes about 5 to 10 minutes to obtain a chromatogram with gas chromatograph 3.

[0030] The gas supply unit 7 supplies gas to the gas chromatograph 3. The gas supply unit 7 adds gas when the amount of sample gas discharged from the spectrophotometer 1 is insufficient for stable analysis in the gas chromatograph 3. This ensures that stable analysis in the gas chromatograph 3 is possible even when only a small amount of sample gas is supplied to the analysis system 100.

[0031] In one embodiment, the gas supply unit 7 is a gas cylinder or piping to which gas is supplied. The inflow of gas from the gas supply unit 7 to the gas chromatograph 3 is controlled by an on / off valve 71.

[0032] The control device 9 acquires the analysis results from the spectrophotometer 1 and the gas chromatograph 3, and controls the spectrophotometer 1, the gas chromatograph 3, the switching valve 5, and the on / off valve 71 based on these analysis results. The control device 9 includes a processor 90, a memory 91, a display device 92, and an input device 93.

[0033] The processor 90 is, for example, a central processing unit (CPU) and is a processing circuitry that executes predetermined arithmetic processing described in a program. The processor 90 reads out the programs and data stored in the memory 91 and executes various processes.

[0034] The memory 91 includes non-volatile or volatile memory such as a read only memory (ROM) or a random access memory (RAM), and / or a large-capacity storage device such as a hard disc drive (HDD) or a solid state drive (SSD).

[0035] The display device 92 is, for example, a liquid crystal display (LCD) or an organic electroluminescence (EL) display, and displays various information stored in the memory 91 .

[0036] The input device 93 is, for example, a keyboard, a mouse, a pointing device, a touch panel, etc., and accepts user operations. In one embodiment, the input device 93 can be used to input the type of target component and / or the type of impurities.

[0037] The control device 9 determines whether or not to perform quantitative analysis in the gas chromatograph 3 based on the analysis results (spectrum) received from the spectrophotometer 1 .

[0038] Specifically, the control device 9 continuously measures the components in the sample gas and continuously acquires spectra using the spectrophotometer 1. Normally, the control device 9 controls the switching valve 5 so that the sample gas discharged from the spectrophotometer 1 is discharged from the second flow path 62, and does not perform quantitative analysis using the gas chromatograph 3.

[0039] On the other hand, if the spectrum satisfies the preset conditions, the control device 9 controls the switching valve 5 so that the sample gas discharged from the spectrophotometer 1 flows into the first channel 61 instead of the second channel 62, and performs quantitative analysis with the gas chromatograph 3. These preset conditions are, for example, conditions set by the user using the input device 93 when they consider it preferable to perform quantitative analysis with the gas chromatograph 3.

[0040] In one embodiment, the control device 9 performs quantitative analysis using the gas chromatograph 3 when an abnormal condition is detected in the spectrum. An abnormal condition is a state in which the value of a predetermined peak (e.g., absorbance or signal intensity) is significantly different from normal, and more specifically, a state in which the value on the vertical axis corresponding to a predetermined value on the horizontal axis falls outside a predetermined reference range. More specifically, a first example of an abnormal condition is a state in which a peak that is not normally detected is detected in the spectrum. A second example is a state in which a peak that is normally detected in the spectrum is not detected. As described above, in this specification, an abnormal condition refers to a state that is different from normal, and may be a desirable or undesirable state for the user.

[0041] In the first example, the generated gas (sample gas) generated from the catalyst contains CH ４ In this case, it is desired to include CH ４ When a peak corresponding to CH is detected, the switching valve 5 is controlled so that the sample gas is introduced into the gas chromatograph 3. The gas chromatograph 3 separates and analyzes the introduced sample gas, and performs precise quantification. ４ You can check the amount of synthesis.

[0042] As a second example, the control device 9 controls the switching valve 5 so that the sample gas is introduced into the gas chromatograph 3 when a predetermined peak that is thought to correspond to the harmful gas suddenly disappears from the spectrum of a sample gas containing a predetermined amount of the harmful gas. The gas chromatograph 3 can then be used to verify whether the harmful gas has actually decreased and / or to what extent it has decreased.

[0043] With the control device 9 as shown in the first and second examples, it is possible to continuously monitor the target component with the spectrophotometer 1 under normal circumstances, and to perform detailed quantitative analysis with a gas chromatograph when a change occurs in the target component.

[0044] In other embodiments, the control device 9 performs quantitative analysis using the gas chromatograph 3 if the spectrum indicates insufficient sensitivity of the spectrophotometer 1. Specifically, if the peaks in the spectrum are generally low, the control device 9 may determine that the spectrophotometer 1 is insufficiently sensitive and perform analysis using the gas chromatograph 3, which has higher sensitivity. This makes it possible to continuously monitor the spectrum using the spectrophotometer 1 under normal circumstances, while performing detailed quantitative analysis using the gas chromatograph 3 when the spectrum is insufficiently sensitive.

[0045] In other embodiments, the control device 9 may perform analysis using the spectrophotometer 1 if the target component is one that is suitable for analysis using the spectrophotometer 1, or perform analysis using the gas chromatograph 3 if the target component is one that is suitable for analysis using the gas chromatograph 3.

[0046] In further embodiments, the control device 9 may be configured to monitor the first type of target component in the gas chromatograph 3 when the sample gas contains a first type of target component and a second type of target component, and the two target components are correlated. When a significant fluctuation is detected, the control device 9 may analyze the second type of target component in the gas chromatograph 3.

[0047] Preferably, when quantitative analysis is performed in the gas chromatograph 3, the control device 9 supplies the gas necessary for quantitative analysis from the gas supply unit to the gas chromatograph. In one embodiment, the control device 9 monitors the amount of sample gas flowing into the gas chromatograph 3 using a flow meter (not shown) that measures the flow rate of the sample gas discharged from the spectrophotometer 1. If the amount of sample gas does not reach an amount that can be stably analyzed in the gas chromatograph 3, the control device 9 adds gas from the gas supply unit 7 until an amount that can be stably analyzed is reached. The additional gas may be introduced into the gas chromatograph 3 via a gas injection unit (gas sampler), or it may be introduced directly into the inlet of the gas chromatograph 3.

[0048] The analysis conditions for both the spectrophotometer 1 and the gas chromatograph 3 are set based on the type of target component. The analysis conditions for both the spectrophotometer 1 and the gas chromatograph 3 may be set in consideration of not only the type of target component but also the type of impurities.

[0049] For example, the user or the control device 9 sets the type of gas cell 11 (e.g., the optical path length of the gas cell 11) to be used in the spectrophotometer 1 and the wavelength at which the spectrum is acquired depending on the type of target component and / or the type of impurity.

[0050] Furthermore, for example, the user or the control device 9 sets the type of column 31 used in the gas chromatograph 3 and the column temperature according to the type of target component and / or the type of impurities.

[0051] In one example, a user inputs the type of target component and / or the type of impurities using the input device 93. The control device 9 sets analysis conditions for both the spectrophotometer 1 and the gas chromatograph 3 based on the information (type of target component and / or type of impurities) input to the input device 93. Specifically, for example, the memory 91 stores a list containing analysis conditions for both the spectrophotometer 1 and the gas chromatograph 3 corresponding to the type of target component and / or the type of impurities, and the analysis conditions for both the spectrophotometer 1 and the gas chromatograph 3 corresponding to the type of target component and / or the type of impurities input to the input device 93 are set in the spectrophotometer 1 and the gas chromatograph 3. With this configuration, the user can set analysis conditions that allow appropriate analysis to be performed in both the spectrophotometer 1 and the gas chromatograph 3 at the same time.

[0052] The analytical system 100 according to the embodiment may have multiple columns 31 and may be configured to use columns 31 corresponding to the type of target component and / or the type of impurity. In one example, the control device 9 selects a column suitable for the type of target component and / or the type of impurity based on the type of target component and / or the type of impurity input to the input device 93. For example, the control device 9 may selectively use a normal column or a column suitable for analysis when there is a high level of moisture in the sample gas, depending on the amount of moisture contained in the sample gas. Furthermore, for example, when monitoring multiple types of target components, the control device 9 may selectively use a column suitable for analyzing a first type of target component and a column suitable for analyzing a second type of target component.

[0053] [2. Comparison with conventional analytical systems] In recent years, in the development of efficient chemical reactions using catalysts for the efficient production of synthetic fuels, infrared spectrometers have been used for simple and rapid measurements, while gas chromatographs have been used to monitor detailed reaction processes and minute product stages.

[0054] For example, in the analysis of sample gases (evolved gases) generated during catalytic reaction performance evaluation, infrared spectroscopy is a rapid method that can be completed in a few minutes, and it is possible to qualitatively identify unknown generated components from spectral information. On the other hand, infrared spectroscopy is susceptible to interference from contaminants and the atmosphere, and it is difficult to achieve a wide quantitative measurement range, making it unsuitable for detailed quantitative analysis. Gas chromatography can separate and detect gas components, resulting in extremely high quantitative accuracy, and by using detectors with various detection principles, a very wide range of measurable concentrations can be achieved. On the other hand, gas chromatography generally takes more than five minutes to measure, and it is necessary to limit the gas components to be generated in advance and prepare an appropriate setup, so it is not as fast or easy to use.

[0055] To evaluate sample gases, it is considered effective to use infrared spectrophotometers and gas chromatographs appropriately, taking into account the advantages described above. However, until now, there has been no system that can combine these instruments and switch between them appropriately for analysis. Therefore, users have had to choose one of the instruments to build their analysis system. Furthermore, when using each instrument, it is necessary to redesign the sample gas introduction system in front of each instrument, resulting in complicated work and making it difficult to compare acquired data between different analysis systems and / or between different instruments.

[0056] Therefore, in the analysis system 100 according to Embodiment 1, in view of the above problems, a spectrophotometer and a chromatograph are connected in series to perform rapid and simple measurements with the spectrophotometer 1, and, if necessary, perform detailed analysis such as quantitative analysis of predetermined components with the gas chromatograph 3. This makes it possible to continuously monitor the sample gas (real-time monitoring) within the same system and switch to detailed quantitative analysis as needed. For example, a fraction of a sample gas in which an abnormal state is detected in the spectrum can be measured directly with the gas chromatograph 3. Furthermore, it is easy to compare analysis results among multiple users using multiple analysis systems 100 with the same configuration.

[0057] 4 is a schematic diagram of an analysis system 100A according to embodiment 2. The analysis system 100A includes a liquid supply unit 7A, a dissolving unit 8, and a liquid chromatograph 3A instead of the gas supply unit 7 and gas chromatograph 3 of the analysis system 100.

[0058] The liquid supply unit 7A supplies solvent to the liquid chromatograph 3A. This solvent is a liquid capable of dissolving the target component of the sample gas. The liquid supply unit 7A supplies an amount of solvent to the dissolution unit 8 that allows for stable analysis in the liquid chromatograph 3A.

[0059] In one embodiment, the liquid supply unit 7A is a container that holds the solvent or a pipe through which the solvent is supplied. The inflow of the solvent from the liquid supply unit 7A to the liquid chromatograph 3A is controlled by an on / off valve 71.

[0060] The dissolving unit 8 dissolves the target component of the sample gas discharged from the spectrophotometer 1 into the solvent. Specifically, the sample gas discharged from the spectrophotometer 1 also flows into the dissolving unit 8 via the switching valve 5. Then, in the dissolving unit 8, the target component of the sample gas is dissolved in the solvent, for example, by bubbling the sample gas through the solvent. Preferably, a check valve (not shown) is provided between the switching valve 5 and the dissolving unit 8 to prevent backflow of the sample gas.

[0061] The solvent in which the target component has been dissolved and discharged from the dissolving section 8 flows into the liquid chromatograph 3A.

[0062] The liquid chromatograph 3A separates the components of the sample gas dissolved in the solvent in the column 31A and performs quantitative analysis of the target components.

[0063] More specifically, the liquid chromatograph 3A includes a sample injection section 32A, a column 31A, and a detection section 33A. Components dissolved in a solvent injected from the sample injection section 32A are separated in the column 31A, and the separated components are detected by the detection section 33A, thereby performing quantitative analysis of the target component.

[0064] When the control device 9 performs quantitative analysis of the solvent in which the target component is dissolved in the liquid chromatograph 3A, it supplies the necessary flow rate of solvent for quantitative analysis from the liquid supply unit 7A to the dissolution unit 8.

[0065] According to the second embodiment, it is possible to stably analyze gas components (e.g., formic acid) that are often generated in catalytic reactions and that are easier to measure when dissolved in a liquid, using an appropriate method. Therefore, it is possible to provide an analytical system that can continuously monitor these gas components that are easier to measure when dissolved in a liquid, and can quantify them with high accuracy as needed.

[0066] Aspects It will be understood by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0067] (Item 1) An analytical system according to one aspect includes a spectrophotometer that irradiates a sample gas with light to obtain a spectrum derived from the components of the sample gas, a chromatograph that separates the components of the sample gas using a column and performs quantitative analysis of a target component that is an analysis target, a first flow path connecting the spectrophotometer and the chromatograph, a second flow path having one end connected to the spectrophotometer and the other end open to the outside, a switching valve that switches whether the spectrophotometer is connected to the first flow path or the second flow path, and a control device that controls the switching valve. The control device determines whether to perform quantitative analysis in the chromatograph based on the spectrum.

[0068] According to the analytical system described in paragraph 1, a quick and simple measurement can be performed using a spectrophotometer, and if necessary, a detailed analysis such as the quantification of a predetermined component can be performed using a gas chromatograph. Therefore, an analytical system can be provided that can continuously monitor the sample gas and, if necessary, perform highly accurate quantification.

[0069] (2) In the analysis system according to the first aspect, the chromatograph is a gas chromatograph. The analysis system further includes a gas supply unit that supplies gas to the gas chromatograph. When quantitative analysis is performed in the gas chromatograph, the control device controls the gas supply unit to supply gas to the gas chromatograph at a flow rate required for the quantitative analysis.

[0070] According to the analysis system described in paragraph 2, if the amount of sample gas discharged from the spectrophotometer does not reach an amount that can be stably analyzed in the gas chromatograph, gas can be added from the gas supply unit until an amount that can be stably analyzed is reached.

[0071] (Item 3) In the analysis system described in item 1, the chromatograph is a liquid chromatograph. The analysis system further includes a liquid supply unit that supplies a solvent to the liquid chromatograph and a dissolving unit that dissolves a target component of the sample gas discharged from the spectrophotometer in the solvent. When quantitative analysis of the solvent in which the target component has been dissolved is performed in the liquid chromatograph, the control device controls the liquid supply unit to supply the solvent to the dissolving unit at a flow rate required for quantitative analysis.

[0072] According to the analysis system described in paragraph 3, it is possible to provide an analysis system that enables continuous monitoring and, when necessary, highly accurate quantitative analysis of gaseous components that are easier to measure when dissolved in liquid.

[0073] (Article 4) In the analysis system described in any one of paragraphs 1 to 3, the control device shall perform quantitative analysis in the chromatograph if an abnormal condition is detected in the spectrum.

[0074] According to the analysis system described in Section 4, it is possible to continuously monitor the target component using a spectrophotometer and perform detailed quantitative analysis using a chromatograph when changes occur in the target component.

[0075] (Item 5) In the analytical system described in any one of items 1 to 4, the control device shall perform quantitative analysis using a chromatograph if the spectrum indicates insufficient sensitivity of the spectrophotometer.

[0076] According to the analysis system described in Section 5, it is possible to continuously monitor the data using a spectrophotometer under normal circumstances, and to perform detailed quantitative analysis using a chromatograph when the sensitivity is insufficient.

[0077] (Item 6) In the analytical system according to any one of Items 1 to 5, the control device further includes an input device for inputting the type of target component and / or the type of impurities. The control device sets analytical conditions for both the spectrophotometer and the chromatograph based on the information input to the input device.

[0078] According to the analysis system described in paragraph 6, analysis conditions that enable appropriate analysis to be performed in both the spectrophotometer and the gas chromatograph can be set at once.

[0079] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0080] 1 Spectrophotometer, 3 Gas chromatograph, 3A Liquid chromatograph, 5 Switching valve, 7 Gas supply unit, 7A Liquid supply unit, 8 Dissolving unit, 9 Control device, 11 Gas cell, 31, 31A Column, 32, 32A Sample injection unit, 33, 33A Detection unit, 61 First flow path, 62 Second flow path, 63 Third flow path, 71 Opening and closing valve, 90 Processor, 91 Memory, 92 Display device, 93 Input device, 100, 100A Analysis system.

Claims

1. An analytical system comprising: a spectrophotometer that irradiates a sample gas with light to obtain a spectrum derived from the components of the sample gas; a chromatograph that separates the components of the sample gas using a column and performs quantitative analysis of the target components that are the subject of analysis; a first flow path that connects the spectrophotometer and the chromatograph; a second flow path that has one end connected to the spectrophotometer and the other end open to the outside; a switching valve that switches whether the spectrophotometer is connected to the first flow path or the second flow path; and a control device that controls the switching valve, wherein the control device determines whether the quantitative analysis will be performed in the chromatograph based on the spectrum.

2. The analytical system according to claim 1, wherein the chromatograph is a gas chromatograph, the analytical system further comprises a gas supply unit that supplies gas to the gas chromatograph, and when the quantitative analysis is performed in the gas chromatograph, the control device causes the gas supply unit to supply gas to the gas chromatograph at a flow rate required for the quantitative analysis.

3. The analytical system of claim 1, wherein the chromatograph is a liquid chromatograph, and the analytical system further comprises a liquid supply unit that supplies a solvent to the liquid chromatograph, and a dissolving unit that dissolves the target component of the sample gas discharged from the spectrophotometer in the solvent, and when performing quantitative analysis of the solvent in which the target component has been dissolved in the liquid chromatograph, the control device controls the liquid supply unit to supply the solvent at a flow rate required for the quantitative analysis to the dissolving unit.

4. The analytical system according to claim 1 or 2, wherein the control device performs the quantitative analysis in the chromatograph when an abnormal state is detected in the spectrum.

5. The analytical system of claim 1 or 2, wherein the control device performs the quantitative analysis in the chromatograph if the spectrum indicates insufficient sensitivity of the spectrophotometer.

6. An analytical system according to claim 1 or 2, wherein the control device further comprises an input device for inputting the type of the target component and / or the type of impurities, and the control device sets the analytical conditions for both the spectrophotometer and the chromatograph based on the information input to the input device.

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