JP6089445B2 - Component analysis apparatus and component analysis method - Google Patents

Description

  The present invention relates to a component analysis apparatus and a component analysis method, and more particularly to a component analysis apparatus and a component analysis method for detecting light emission of an oxide of an analysis target component.

  2. Description of the Related Art Conventionally, a component analyzer that detects light emission of an oxide as an analysis target component is known (for example, see Patent Document 1).

Patent Document 1 discloses a sulfur chemiluminescence detector (SCD), which is a component analyzer for quantitatively detecting the sulfur content in a sample mixture. SCD is a component analyzer specialized for sulfur components, and consists of the following. A combustion device that oxidizes and reduces sulfur compounds, a reaction cell that generates sulfur dioxide chemiluminescence by reacting sulfur monoxide generated in the combustion device with ozone to produce sulfur dioxide in an excited state; and a reaction cell And a detector for detecting light emission of sulfur dioxide generated in step (b). The combustion apparatus includes a combustion tube made of ceramic (alumina). A sample mixture and oxygen (oxidant) are supplied into the combustion tube, and by burning these, a sulfur compound is oxidized to generate sulfur dioxide. . Further, hydrogen (reducing agent) is separately supplied to the combustion pipe, and the combustion device reduces sulfur compound (sulfur dioxide) that has been oxidized by a hydrogen reducing flame to generate sulfur monoxide. With the above configuration, the reaction accompanying sulfur detection by SCD is explained as follows.
Combustion device: sulfur compound + O ₂ → SO ₂ + CO ₂ + H ₂ O + (oxidation)
SO ₂ + H ₂ → SO + H ₂ O (reduction)
Reaction cell: SO + O ₃ → SO ₂ ^* + O ₂ (excitation)
SO ₂ ^* → SO ₂ + hν (light emission)
Note that “ ^* ” represents a molecule in an excited state. hν is a photon generated when the molecule transitions from the excited state to the ground state.

US Patent No. 6130095

  However, in the SCD (component analysis apparatus) disclosed in Patent Document 1, the catalytic action of ceramic (alumina) used in the combustion tube affects both oxidation and reduction reactions occurring in the combustion tube. As a result, the detection sensitivity becomes unstable. That is, it is considered that the surface state of alumina easily changes on the inner wall of the combustion tube used at high temperature, and as a result, the influence of the catalytic action of alumina on the oxidation and reduction reactions also changes according to the surface state of alumina. . For this reason, even if the reaction conditions (pressure, gas flow rate, reaction temperature, etc.) in the combustion tube are kept constant, the detection sensitivity is considered to be unstable due to the surface state of the combustion tube.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a component analysis apparatus and a component analysis method capable of suppressing instability of detection sensitivity. It is to be.

In order to achieve the above object, the component analyzer according to the first aspect of the present invention affects both oxidation and reduction reactions by a chromatograph that separates predetermined components in a sample mixture and catalytic action. The catalytic action of the ceramic on the reduction reaction by oxidizing at least a portion of the sample mixture containing the predetermined components separated by the chromatograph and not performing reduction, having a combustion tube formed of a ceramic material The oxide of the predetermined component is generated by using the oxidation part that generates the oxide of the predetermined component, the excited species generation part that generates the excited species, and the excited species generated by the excited species generation part. An excitation unit that excites and emits light, and a light emission detection unit that detects light emission of an oxide of a predetermined component.

In the component analyzer according to the first aspect of the present invention, as described above, the oxide of the predetermined component is obtained by oxidizing at least part of the sample mixture containing the predetermined component and not performing active reduction. By providing an oxidation part that generates oxidant, the reduction reaction can be omitted in the oxidation part. As a result, even when a ceramic combustion tube is used for the oxidation portion, it is possible to eliminate the influence on the reduction reaction among the catalytic action of the ceramic involved in both the oxidation and the reduction reaction. As a result, the influence of the catalytic action of the ceramic can be reduced, so that destabilization of detection sensitivity can be suppressed. In addition, since the structure for introducing the conventional reducing agent in the oxidation unit can be omitted, the apparatus configuration can be simplified and the apparatus can be downsized. In the present invention, since the reduction reaction is not performed, the excited species generated by the excited species generation unit is used, unlike the case of providing a reaction cell that excites the oxide after reduction and ozone by chemical reaction. By providing an excitation part that excites a predetermined component oxide to emit light, an unreduced oxide can be excited by excited species to emit light (fluorescence) without using a chemical reaction. As a result, even when the reduction reaction is omitted, it is possible to detect the luminescence of the analysis target component in the same manner as in the conventional analyzer using chemiluminescence.
A component analyzer according to a second aspect of the present invention includes an oxidation unit that generates an oxide of a predetermined component by oxidizing at least a part of a sample mixture containing the predetermined component and not performing reduction, and excitation. Using the excited species generation unit that generates the seed, the excited species generated by the excited species generation unit, the excitation unit that excites the oxide of the predetermined component to emit light, and the emission of the oxide of the predetermined component is detected The excitation unit is provided separately from the excited species generation unit and is connected to each of the oxidation unit and the excited species generation unit.

In the component analyzer according to the first or second aspect, the excited species generation unit is configured to generate excited species from an inert gas. Preferably, excited species are generated from a rare gas. If comprised in this way, the oxide of a various component can be excited effectively by using the excited species of the noble gas which has high excitation energy compared with another element.

In the component analysis apparatus according to the first or second aspect, preferably, the excited species generation unit includes a discharge tube or a plasma generator. With this configuration, excited species can be easily generated by a discharge phenomenon or plasma.

In the component analysis apparatus according to the first or second aspect, preferably, the oxidation unit includes a mixing unit that mixes the sample mixture and the hydrogen-containing substance. If comprised in this way, decomposition | disassembly and oxidation of a sample mixture can be accelerated | stimulated by the heat_generation | fever accompanying reaction (combustion) of hydrogen and oxygen in an oxidation part. For example, when sulfur detection is performed, since sulfur (sulfur dioxide) and nitrogen monoxide fluorescence wavelength bands are close to each other, nitric oxide becomes an inhibitor of sulfur detection. In this case, the water vapor generated as a result of the reaction between hydrogen and oxygen in the oxidation part reacts with nitric oxide, so that nitric oxide can be changed to another substance, so that the fluorescence characteristics of nitric oxide Can be selectively suppressed. As a result, it is possible to suppress the influence of an inhibitory substance particularly on sulfur detection and perform a more accurate component analysis.

  In the configuration in which the excited species generating unit generates excited species from a rare gas, preferably, the oxidizing unit is configured to oxidize a sulfur component in a sample mixture containing a sulfur compound to generate sulfur dioxide, The excitation unit is configured to excite sulfur dioxide using the rare gas excitation species generated by the excitation species generation unit to emit light. If comprised in this way, desensitization of a detection sensitivity can be suppressed and highly sensitive sulfur detection can be performed, maintaining a detection sensitivity stably.

The component analyzer according to the first aspect is configured to generate an oxide of a predetermined component by oxidizing the predetermined component separated by the chromatograph by the oxidation unit and not performing the reduction. . If comprised in this way, the predetermined component used as analysis object will be isolate | separated from the mixed sample of many components, and a highly accurate detection can be performed.

According to a third aspect of the present invention, there is provided a component analysis method comprising at least part of a sample mixture containing a predetermined component in a combustion tube formed by a ceramic material that affects both oxidation and reduction reactions by catalytic action. Oxidizing and not reducing, eliminating the influence of the catalytic action of the ceramic on the reduction reaction , generating oxides of a given component, generating excited species by discharge phenomenon or plasma, and generating A step of exciting the oxide of the predetermined component to emit light using the excited species, and a step of detecting light emission of the oxide of the predetermined component.

In the component analysis method according to the third aspect of the present invention, as described above, an oxide of a predetermined component is generated by oxidizing at least a part of the sample mixture containing the predetermined component and not performing reduction. By providing the step, the reduction reaction can be omitted in the step of generating the oxide of the predetermined component. As a result, even when a ceramic combustion tube is used in the step of generating an oxide of a predetermined component, it is possible to eliminate the influence on the reduction reaction among the catalytic action of the ceramic involved in both the oxidation and the reduction reaction. it can. As a result, the influence of the catalytic action of the ceramic can be reduced, so that destabilization of detection sensitivity can be suppressed. Further, since the structure for introducing the conventional reducing agent can be omitted in the step of generating the oxide of the predetermined component, the device configuration for implementing the component analysis method is simplified and the device is downsized. Can also be achieved. Further, in the present invention, since the reduction reaction is not performed, unlike the conventional case where a reaction cell that excites the oxide after reduction and ozone is chemically reacted is provided, the generated excited species are used to form a predetermined component. By providing the step of emitting light by exciting the oxide, the unreduced oxide can be excited to emit light without using a chemical reaction. As a result, even when the reduction reaction is omitted, the emission of the analysis target component can be detected as in the conventional analysis method.

In the component analysis method according to the third aspect, preferably, the step of generating an oxide of a predetermined component includes a step of generating sulfur dioxide by oxidizing a sulfur component in a sample mixture containing a sulfur compound, The step of generating a seed includes a step of generating a metastable excited species of a rare gas molecule by a discharge phenomenon or plasma, and the step of emitting light by exciting an oxide of a predetermined component includes the generated rare gas molecule A step of exciting the sulfur dioxide using the metastable excited species to emit light. If comprised in this way, a sulfur dioxide can be excited effectively by using the metastable excited species of the noble gas molecule which has high excitation energy compared with another element. Then, desensitization of detection sensitivity can be suppressed, and highly sensitive sulfur detection can be performed while maintaining detection sensitivity stably.

In the component analysis method according to the third aspect, preferably, in the step of generating the oxide of the predetermined component, the sample mixture containing the predetermined component and the hydrogen-containing substance are mixed and then oxidized to obtain a predetermined component. Forming a component oxide. If comprised in this way, decomposition | disassembly and oxidation of a sample mixture can be accelerated | stimulated by the heat_generation | fever accompanying reaction (combustion) of hydrogen and oxygen in an oxidation reaction. In addition, when performing sulfur detection, the water vapor generated as a result of the reaction between hydrogen and oxygen in the step of generating an oxide of a predetermined component reacts with nitrogen monoxide, which is an inhibitor, to thereby convert nitrogen monoxide. Since it can be changed to another substance, the fluorescence characteristic of nitric oxide can be selectively suppressed. As a result, it is possible to suppress the action of an inhibitory substance particularly in sulfur detection and perform a more accurate component analysis.

  According to the present invention, as described above, it is possible to suppress instability of detection sensitivity.

It is the schematic diagram which showed the whole structure of the component analyzer by 1st Embodiment of this invention. It is the schematic diagram which showed the whole structure of the component analyzer by 2nd Embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
First, the overall configuration of the component analyzer 100 according to the first embodiment of the present invention will be described with reference to FIG. 1st Embodiment demonstrates the example which applied this invention to the component analyzer 100 for quantifying the content of sulfur in the mixed sample containing a sulfur compound.

  The component analysis apparatus 100 according to the first embodiment shows an example of a form in which component separation by the gas chromatograph 1 is used in combination in introducing a sample. The component analysis apparatus 100 mainly includes a gas chromatograph 1, an oxidation unit 2, an excitation cell 3, an excited species generation unit 4, and a luminescence detection unit 5. The gas chromatograph 1 is an example of the “chromatograph” in the present invention.

  The gas chromatograph 1 includes a column 11. The mixed sample containing the sulfur compound is vaporized in the vaporizing chamber 12 and separated in the column 11 for each compound constituting the sample. Thereby, the gas chromatograph 1 has a function of separating sulfur compounds in the sample. A sample (separated sample) separated by the column 11 is introduced into the oxidation unit 2.

  In 1st Embodiment, the oxidation part 2 is comprised so that a sulfur compound may be oxidized by oxidizing at least one part in the sample mixture containing a sulfur compound and not performing a reduction | restoration. The oxidation unit 2 generates sulfur dioxide by oxidizing a sulfur compound in the sample without performing a reduction reaction.

  The oxidation unit 2 includes a combustion tube and a heater (not shown). The combustion tube is a ceramic combustion tube that can withstand high temperatures from a heater. The ceramic material is preferably high-purity alumina having a purity of 99% or more. The separated sample (sulfur compound) is mixed with the oxidant 21 and introduced into the combustion tube. At this time, an excessive amount of the oxidant 21 is introduced into the oxidation unit 2 in excess of the stoichiometric ratio sufficient to oxidize the sample. The oxidant 21 is preferably oxygen or air. The mixture of the sample and the oxidant 21 is decomposed and oxidized (burned) in the high-temperature combustion tube. The oxidation unit 2 is configured to heat the inside of the combustion tube to a high temperature of 500 ° C. or higher by a heater. Preferably, the heating temperature is from about 700 ° C to about 1100 ° C. This is because the oxidation reaction can be promoted as the heating temperature is increased, whereas the surface state of the combustion tube (alumina) is likely to change when the temperature is too high.

  The oxidation unit 2 is connected to the excitation cell 3 via the transfer pipe 6. The excitation cell 3 is connected to a pump 8 via a scrubber 7. By the suction of the pump 8, the product of the oxidation unit 2 is introduced from the outlet of the oxidation unit 2 into the excitation cell 3 through the transfer pipe 6. For this reason, the path from the oxidizer 2 through the excitation cell 3 to the pump 8 is in a reduced pressure state. The depressurized state is, for example, about 1/10 atm in the oxidation unit 2 and about 1/100 atm in the excitation cell 3.

  The excitation cell 3 is configured to excite sulfur dioxide using the excited species of the inert gas 41 generated by the excited species generator 4 to emit light. The excitation cell 3 is an example of the “excitation unit” in the present invention. The excited species generation unit 4 includes a discharge tube, and generates a metastable inert gas 41 as an excited species by exciting the supplied inert gas 41 by a discharge phenomenon. The sulfur dioxide introduced into the excitation cell 3 is excited by receiving energy by collision with the high-energy excited species supplied from the excited species generating unit 4. The inert gas 41 used for the excited species is a rare gas such as helium or argon or a gas containing nitrogen, preferably helium (He). Metastable helium has a high internal energy (about 13.5 to 17.7 eV) that is much higher than the ionization energy of sulfur dioxide (about 12.3 eV) and has a very long lifetime. For this reason, it is possible to excite sulfur dioxide effectively. The sulfur dioxide excited in the excitation cell 3 generates fluorescence having a wavelength of about 300 nm to about 450 nm in the process of transition to the ground state.

A light emission detection unit 5 is connected to the excitation cell 3 via an optical filter 51. The optical filter 51 is configured to transmit only light in a wavelength band corresponding to the emission wavelength of sulfur dioxide. The light emission detection unit 5 is a photomultiplier tube and outputs a detection signal corresponding to light emission. Thereby, the light emission of sulfur dioxide generated in the excitation cell 3 is detected by the light emission detection unit 5 through the optical filter 51. It is possible to quantify the sulfur content from the detection signal corresponding to the emission of sulfur dioxide. Thereafter, the sulfur dioxide introduced into the excitation cell 3 is removed by the downstream scrubber 7. With the above configuration, the reaction accompanying sulfur detection of the component analyzer 100 according to the first embodiment is represented by the following reaction formula.
Oxidizing part: sulfur compound + O ₂ → SO ₂ + CO ₂ + H ₂ O + (oxidation)
Excitation cell: SO ₂ + He ^* → SO ₂ ^* + He (excitation)
SO ₂ ^* → SO ₂ + hν (light emission)
Note that “ ^* ” represents an excited state. h is the Planck's constant and ν is the frequency.

  In the first embodiment, as described above, by oxidizing at least part of the sample mixture containing sulfur (sulfur compound) and not performing reduction, the oxidation unit 2 that generates sulfur dioxide is provided, thereby oxidizing the sample mixture. In part 2, the reduction reaction can be omitted. Thereby, the influence with respect to a reduction reaction can be excluded among the influence which the catalytic action of the ceramic (alumina) which comprises the combustion pipe | tube of the oxidation part 2 has with respect to an oxidation reaction and a reduction reaction. As a result, since the influence of the catalytic action of the ceramic can be reduced in the oxidation unit 2, it is possible to suppress the destabilization of the detection sensitivity of the component analyzer. In addition, since the structure for introducing the conventional reducing agent in the oxidation unit 2 can be omitted, it is possible to simplify the apparatus configuration and reduce the apparatus size. In the first embodiment, since the reduction reaction is not performed, the excited species generation unit 4 is different from the conventional case in which a reaction cell for exciting the oxide after reduction (sulfur monoxide) and ozone is chemically reacted. By providing the excitation cell 3 that emits light by exciting sulfur dioxide using the excited species generated by the above, unreduced sulfur dioxide can be excited by the excited species to emit light without using a chemical reaction. As a result, even when the reduction reaction is omitted, the emission of the analysis target component (sulfur) can be detected as in the conventional analyzer.

  In the first embodiment, as described above, the excited species generation unit 4 is configured to generate excited species from helium (rare gas). Thereby, sulfur dioxide can be excited effectively by using metastable helium having higher excitation energy than other elements.

  In the first embodiment, as described above, the excited species generation unit 4 includes a discharge tube. Thereby, the excited species can be easily generated by the discharge phenomenon.

  In the first embodiment, as described above, the oxidation unit 2 is configured to generate sulfur dioxide by oxidizing a sulfur component in a sample mixture containing a sulfur compound. The helium excited species generated by the seed generating unit 4 is used to excite sulfur dioxide to emit light. Thereby, desensitization of detection sensitivity can be suppressed and highly sensitive sulfur detection can be performed while maintaining detection sensitivity stably.

  In the first embodiment, as described above, sulfur (sulfur compound) separated by the gas chromatograph 1 is oxidized by the oxidation unit 2 and is not reduced, thereby generating sulfur dioxide. ing. Thereby, a substance to be analyzed (sulfur) can be separated from a mixed sample of many components, and highly accurate detection can be performed.

(Second Embodiment)
Next, a component analyzer 200 according to the second embodiment of the present invention will be described with reference to FIG. 2nd Embodiment demonstrates the example which provided the mixing part 122 which mixes a sample mixture and a hydrogen-containing substance in addition to the component analyzer 100 by the said 1st Embodiment. Note that in the second embodiment, the same components as those of the component analyzer 100 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 2, the oxidation unit 102 of the component analyzer 200 according to the second embodiment includes a mixing unit 122 that mixes the sample mixture and the hydrogen-containing substance 123.

  The mixing unit 122 is provided at the inlet of the oxidation unit 102 and is connected to the outlet of the column 11 of the gas chromatograph 1. Moreover, the mixing part 122 is comprised so that the hydrogen-containing substance 123 may be introduce | transduced. Thereby, the mixing unit 122 mixes the sample introduced from the gas chromatograph 1 with the hydrogen-containing substance 123 and introduces the mixed gas into the oxidation unit 102. The hydrogen-containing material 123 is a hydrocarbon such as hydrogen or methane, and is preferably hydrogen.

  The mixed gas of the sample introduced into the oxidation unit 102 and the hydrogen-containing substance 123 is mixed with the oxidant 21 and decomposed and oxidized (burned). At this time, hydrogen in the hydrogen-containing substance 123 and oxygen in the oxidant 21 cause an exothermic reaction (combustion) in the combustion tube. For this reason, decomposition | disassembly and oxidation of sulfur in a sample are accelerated | stimulated by the heat_generation | fever accompanying combustion. In addition, as a result of the reaction between hydrogen in the hydrogen-containing substance 123 and oxygen in the oxidant 21, water vapor is generated in the combustion tube.

  Here, in the component separation process of the mixed sample by the gas chromatograph 1, when the separation of the substance containing the sulfur compound and the substance containing the nitrogen compound is not complete, the sulfur compound and the nitrogen compound in the sample are mixed. It will be introduced into the oxidation unit 102. In this case, nitric oxide is generated in the oxidation unit 102, and sulfur dioxide and nitrogen monoxide are simultaneously introduced into the excitation cell 3. The fluorescence wavelength bands of sulfur dioxide and nitric oxide are close to each other, and nitric oxide acts as an inhibitor in the detection of sulfur dioxide (the emission of nitric oxide becomes an error factor). In the second embodiment, water vapor and oxidant 21 generated as a result of the reaction between hydrogen and oxygen in the oxidation unit 102 react with nitrogen monoxide, and the nitric oxide fluorescence characteristics are selectively affected (the effect on sulfur dioxide). Without).

  From the viewpoint of the reaction between nitric oxide and water vapor, it is conceivable to mix the sample and water vapor in the vicinity of the excitation cell 3, but in this case, since the sample and water vapor are in a low temperature state, the reactivity is low. Low. In the second embodiment, by introducing the hydrogen-containing substance 123 at the entrance of the oxidation unit 102, it is possible to effectively react water vapor and nitrogen monoxide at a high temperature in the oxidation unit 102.

  Other configurations of the second embodiment are the same as those of the first embodiment.

  In the second embodiment, as described above, the oxidation unit 102 includes the mixing unit 122 that mixes the sample mixture and the hydrogen-containing material 123. Thereby, decomposition | disassembly and oxidation of a sample (sulfur compound) can be accelerated | stimulated by the heat_generation | fever accompanying reaction (combustion) of hydrogen and oxygen in the oxidation part 102. FIG. In addition, since the water vapor generated in the oxidation unit 102 reacts with nitric oxide, it is possible to change nitric oxide into another substance, so select the fluorescence characteristics of nitric oxide that will inhibit sulfur detection. Can be suppressed. As a result, in particular, the influence of an inhibitory substance (nitrogen monoxide) in sulfur detection can be suppressed, and more accurate sulfur detection can be performed.

  Other effects of the second embodiment are the same as those of the first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the present invention is applied to the component analyzer that quantifies the sulfur content is shown, but the present invention is not limited to this. The present invention may be applied to a component analyzer that performs quantitative analysis of components other than sulfur. In the present invention, since the oxide of the analysis target component is excited by the excited species, the present invention may be applied to the analysis of any material as long as it is a material that is excited by the energy of the excited species and emits light. For example, the ionization energy of nitrogen is about 14.5 eV, which is higher than that of sulfur dioxide, but the energy of metastable helium (about 13.5 to 17.7 eV) can be sufficiently excited.

  In the first and second embodiments, helium is used as the excited species. However, the present invention is not limited to this. In the present invention, a rare gas other than helium may be used as the excited species. In addition, a substance other than the rare gas may be used as the excited species. As described above, the excited species only needs to excite the oxide of the analysis target component by the energy of the excited species.

  Moreover, although the said 1st and 2nd embodiment demonstrated the example which provided the discharge tube in the excitation seed production | generation part and produced | generated excitation seed | species by the discharge phenomenon, this invention is not limited to this. In the present invention, the excited species may be generated by a method other than the discharge phenomenon. For example, the excited species may be generated by generating plasma using a plasma generator other than the discharge tube. As the plasma generator, for example, a plasma generator using a microwave or a laser, an inductively coupled plasma (ICP) generator, or the like may be used. Moreover, when using the discharge phenomenon, any discharge phenomenon such as spark discharge, corona discharge, dielectric barrier discharge, etc. may be used.

  Moreover, although the example of the component analyzer provided with the gas chromatograph was shown in the said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, a chromatograph other than a gas chromatograph such as a liquid chromatograph or a supercritical fluid chromatograph may be used. Further, the component analyzer of the present invention may be used as a single component analyzer for a sample separated and extracted in advance without providing a separation device such as a chromatograph.

  In the second embodiment, the sample and the hydrogen-containing substance (hydrogen) are mixed and introduced into the oxidation unit by the mixing unit, and mixed with the oxidizing agent (oxygen) in the oxidation unit and burned. However, the present invention is not limited to this. In the present invention, the sample and the oxidant may be mixed and introduced into the oxidation part, and mixed with the hydrogen-containing substance in the oxidation part and burned. A mixture of an oxidant and a hydrogen-containing substance is introduced into the oxidation part together with the sample because oxygen and hydrogen react with each other to generate water vapor before combustion, which tends to cause condensation in an atmospheric pressure environment. It is preferable that one of the oxidizing agent and the hydrogen-containing substance is mixed with the sample first.

1 Gas chromatograph (chromatograph)
2,102 Oxidation part 3 Excitation cell (excitation part)
4 Excitation Species Generation Unit 5 Luminescence Detection Unit 122 Mixing Unit 100, 200 Component Analyzer

Claims (9)

A chromatograph for separating predetermined components in the sample mixture;
Having a combustion tube formed of a ceramic material that affects both oxidation and reduction reactions by catalytic action and oxidizing at least a portion of the sample mixture containing the predetermined components separated by the chromatograph; By eliminating the reduction, the influence of the catalytic action of the ceramic on the reduction reaction is eliminated, and an oxidation part that generates an oxide of the predetermined component;
An excited species generator that generates excited species;
An excitation unit that excites the oxide of the predetermined component to emit light using the excited species generated by the excited species generation unit;
A light emission detector for detecting light emission of the oxide of the predetermined component;
A component analyzer. The component analyzer according to claim 1, wherein the excitation unit is provided separately from the excitation species generation unit and is connected to each of the oxidation unit and the excitation species generation unit.   The component analyzer according to claim 1, wherein the excited species generation unit is configured to generate excited species from an inert gas.   The component analysis apparatus according to claim 1, wherein the excited species generation unit includes a discharge tube or a plasma generator.   The component analysis apparatus according to claim 1, wherein the oxidation unit includes a mixing unit that mixes the sample mixture and the hydrogen-containing substance.   The oxidation unit is configured to oxidize a sulfur component in a sample mixture containing a sulfur compound to generate sulfur dioxide, and the excitation unit excites the inert gas generated by the excited species generation unit. The component analyzer according to claim 3, wherein the component analyzer is configured to emit light by exciting the sulfur dioxide using a seed. Separating a predetermined component in the sample mixture by chromatograph;
A sample containing a predetermined component separated in a step of separating a predetermined component in a sample mixture by the chromatograph in a combustion tube formed of a ceramic material that affects both oxidation and reduction reactions by catalytic action Eliminating the influence of the catalytic action of the ceramic on the reduction reaction by oxidizing at least a portion of the mixture and not performing reduction, and generating an oxide of the predetermined component;
Generating excited species by a discharge phenomenon or plasma;
Using the generated excited species to excite and emit light of the oxide of the predetermined component; and detecting light emission of the oxide of the predetermined component;
A component analysis method comprising: The step of generating an oxide of the predetermined component includes the step of generating sulfur dioxide by oxidizing a sulfur component in a sample mixture containing a sulfur compound.
The step of generating the excited species includes a step of generating metastable excited species of an inert gas by a discharge phenomenon or plasma,
Step of emitting light by exciting oxide of the predetermined component comprises a step of emitting light by exciting the sulfur dioxide with the excited species metastable state of the generated said inert gas to claim 7 The component analysis method described. The step of generating the oxide of the predetermined component includes the step of generating the oxide of the predetermined component by mixing the sample mixture containing the predetermined component and the hydrogen-containing substance and then oxidizing the mixture. The component analysis method according to claim 7 or 8 .

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