KR101030931B1 - Measuring apparatus of hydrochloride among a continuous auto-measuring system for exhaust gas of chimney and measuring method for exhaust gas using the same - Google Patents

Measuring apparatus of hydrochloride among a continuous auto-measuring system for exhaust gas of chimney and measuring method for exhaust gas using the same Download PDF

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KR101030931B1
KR101030931B1 KR1020100095828A KR20100095828A KR101030931B1 KR 101030931 B1 KR101030931 B1 KR 101030931B1 KR 1020100095828 A KR1020100095828 A KR 1020100095828A KR 20100095828 A KR20100095828 A KR 20100095828A KR 101030931 B1 KR101030931 B1 KR 101030931B1
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gas
liquid
calibration
sample
measuring
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강화성
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구성테크닉스 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N2001/2244—Exhaled gas, e.g. alcohol detecting

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Abstract

The present invention relates to a hydrogen chloride measuring device and a method of measuring the exhaust gas using the same in the continuous automatic flue gas measuring system of the chimney, the hydrogen chloride measuring instrument in the continuous automatic measuring system of the flue gas of the present invention for measuring the exhaust gas of the chimney, An exhaust gas sampling device; A calibration material used to analyze the sample taken; A gas-liquid mixer for mixing the sample gas with the mixed liquid to sample the flue gas; A gas-liquid separator for separating the gas-liquids mixed in the gas-liquid mixer again into a gas and a liquid; In the continuous automatic gas discharge measurement system consisting of an electrode unit for analyzing the sample gas sample components by the potential difference generated when the liquid is discharged from the gas-liquid separator,
An upper portion of the gas-liquid mixer is provided with an absorption liquid inlet tube and a sample gas inlet tube, and a lower portion of the gas-liquid mixer is provided with a gas-liquid discharge tube for supplying the sample to the gas-liquid separator with the gas-liquid mixed therein. The calibration gas inlet pipe is additionally provided at the location,
The calibration material uses standard gas gasified at the set pressure of the buffer tank, and zero calibration gas and span calibration gas having different concentrations are used as standard gases, and each calibration gas is selectively supplied. Three-way pinch valve is connected so that the calibration gas through the pinch valve is introduced into the calibration gas inlet pipe of the gas-liquid mixer, and the calibration pinch valve so that it can be selectively supplied between the sample gas and the calibration gas. Sample pinch valve is provided between the calibration gas inlet pipe.
Continuous automatic measurement of the exhaust gas of the chimney of the present invention configured as described above and the method of measuring the discharge gas using the same is a system for supplying it at a uniform pressure using a standard gas gasified at the set pressure of the buffer tank as a calibration liquid And by measuring the sample gas by the method using the same, if the calibration must be calibrated by the test report or inspection agency of the standard gas company before calibration, the reliability is greatly increased, and also certified in integrated inspection or accuracy inspection It can greatly contribute to the calculated data, can improve the accuracy of the measurement, can be objectively proved, and also has a useful effect of improving the response speed by 30 to 50% or more compared with the conventional calibration solution.

Description

Measuring apparatus of hydrochloride among a continuous auto-measuring system for exhaust gas of chimney and measuring method for exhaust gas using the same

The present invention relates to a hydrogen chloride measuring instrument and a method for measuring the exhaust gas using the same in the continuous automatic measurement system of the exhaust gas of the chimney, and more particularly, harmful components of harmful emissions generated in various industrial chimneys, such as chemical plants and waste incineration facilities The present invention relates to a hydrogen chloride measuring instrument and a method of measuring the exhaust gas using the chimney flue gas continuous automatic measurement system that can be easily and surely periodically collected and measured.

In addition to the rapid industrial development in recent years, the chimneys operating in various industrial fields, such as chemical processes, and incinerator chimneys that incinerate various incineration wastes such as industrial wastes and domestic wastes, are a major source of environmental pollution. It inevitably occurs, and it is known that these exhaust gases contain various harmful substances. For example, the exhaust gas of a chemical plant includes nitrogen, hydrogen fluoride, hydrogen chloride, etc., and the exhaust gas of the incinerator also includes nitrogen oxides in the exhaust gas of the incinerator where the waste is incinerated by nitrogen, sulfur, chlorine and other organic substances contained in the waste. It contains a large amount of dust, including various harmful substances such as sulfur dioxide, hydrogen sulfide, dioxin, etc., which not only have a direct adverse effect on the human body but also cause a smog phenomenon and acid rain, causing serious environmental problems.

Therefore, in order to protect the public health and the environment, the exhaust gases of various chimneys should not be included in the above harmful substances, or these harmful substances should be removed and discharged to the atmosphere. Regulated.

As such, in order to manage the emission of the chimney from harmful substances, a chimney emission monitoring system capable of monitoring the emission gas in real time is required. By monitoring the emission status for 24 hours, it is possible to prevent the release of air pollutants, thereby improving the air quality. In detail, the systematic and efficient continuous monitoring through the above system improves local air quality, prevents environmental pollution accidents, promotes the health of residents and participates in environmental conservation, and regulates total amount, charges for discharge, rational guidance and environment. It is possible to obtain the effect of acquiring basic data necessary for establishing environmental policy such as impact assessment.

As such a flue gas measurement system, non-dispersive infrared method and ion electrode method are selectively used to analyze hydrogen chloride in the flue gas. In such a system, the flue gas can reach the gas-liquid mixture tube by the high heat generated in the flue. When it is rapidly cooled, dew forms on the inner wall of the gas-liquid mixing tube, and since this dew does not separate from the gas-liquid separation tube, some gaseous components are discharged in the gas discharge tube, so that measurement data cannot be measured accurately. In order to solve such a problem, the present applicant, as shown in FIG. 1, discloses a gas-liquid mixer 200 in which a gas is mixed with a liquid to measure a gas discharged from a chimney, as described in Korean Patent Application No. 2006-0037076. ) And the gas and liquid in the gas-liquid mixed in the gas-liquid mixer 200 In the gas-liquid analyzer connected to the gas-liquid separator 300 for separating and discharging the liquid, the liquid flowing from the absorption liquid inlet tube 202 is the upper end of the gas-liquid discharge tube 203 of the gas-liquid mixer 200 of the gas-liquid mixer 200 The gas-liquid mixing recess 204 and the gas-liquid mixing recess 204 provided with a predetermined space are formed so as not to fall on the lower end of the inner wall, and the liquid discharge pipe 302 of the gas-liquid separator 300 receives gas and liquid to discharge only the liquid to the outside. The gas-liquid treatment system of the chimney TMS waste incineration facility to connect the gas-liquid separation recess 303 formed in the concave portion so that a predetermined space is formed so that the separation of the gas-liquid can be analyzed smoothly. Started.

However, in the chimney exhaust gas measurement system according to the conventional ion electrode method including the above-described invention, when the zero and span calibration is performed, the calibration liquid is produced by the importer or the assembly company by itself or after type approval or installation. It has been used in integrated test or accuracy test. Because of this situation, even the inspection agency is a foreign product, so it cannot be applied to domestic standards, so the calibration is performed according to the calibration liquid of the foreign product. There was no problem.

Therefore, it is very inconvenient to evaluate the accuracy of the calibration, there was also a problem that the response speed is not satisfactory because the liquid is used for the calibration liquid.

Accordingly, the present inventors have made a thorough study to solve the above-mentioned conventional problems and solve the problems. As a result, the present inventors have devised a method for further improving the reaction speed and accuracy while maintaining the reliability of the measurement instead of the conventional calibration liquid. By devising the applicable gas-liquid mixing tube structure, the present invention has been completed.

Patent Document: Republic of Korea Patent Application No. 2006-0037076

The present invention has been made in view of the above-described conventional technology, and the main purpose of the present invention is to continuously measure the exhaust gas of the chimney, which can solve the problems caused by the use of the specified calibration liquid in the conventional flue gas measurement system. To provide a hydrogen chloride meter in the system and the method of measuring the exhaust gas using the same.

Another object of the present invention is to provide a hydrogen chloride measuring device and a method of measuring the exhaust gas using the same in the continuous automatic measurement system of the exhaust gas of the chimney including a new treatment structure in accordance with the replacement of the specified correction liquid.

The present invention may also be directed to achieving other objects in addition to the above-described specific objects that may be readily derived by one of ordinary skill in the art from the general description of this specification.

Hydrogen chloride measuring device of the continuous automatic measurement of the exhaust gas of the chimney of the present invention for achieving the above object;

An exhaust gas sampling device for measuring the exhaust gas of the chimney; A calibration material used to analyze the sample taken; A gas-liquid mixer for mixing the sample gas with the mixed liquid to sample the flue gas; A gas-liquid separator for separating the gas-liquids mixed in the gas-liquid mixer again into a gas and a liquid; In the hydrogen chloride measuring device of the continuous automatic measurement system of exhaust gas consisting of an electrode unit for analyzing the sample gas sample components by the potential difference generated when the liquid is discharged from the gas-liquid separator,

An upper portion of the gas-liquid mixer is provided with an absorption liquid inlet tube and a sample gas inlet tube, and a lower portion of the gas-liquid mixer is provided with a gas-liquid discharge tube for supplying the sample to the gas-liquid separator with the gas-liquid mixed therein. The calibration gas inlet pipe is additionally provided at the location,

The calibration material uses standard gas gasified at the set pressure of the buffer tank, and zero calibration gas and span calibration gas having different concentrations are used as standard gases, and each calibration gas is selectively supplied. Three-way pinch valve is connected so that the calibration gas through the pinch valve is introduced into the calibration gas inlet pipe of the gas-liquid mixer, and the pinch valve and the calibration gas can be selectively supplied between the sample gas and the calibration gas. A sample pinch valve is provided between the gas inlet pipes.

Method for measuring the exhaust gas using a hydrogen chloride measuring device of the continuous automatic measurement system of exhaust gas of the chimney for achieving another object of the present invention;

An exhaust gas sampling device for measuring the exhaust gas of the chimney, a calibration material used to analyze the collected sample, a gas-liquid mixer for mixing the sample gas with the mixed liquid to sample the chimney exhaust gas, Using a continuous gas automatic measurement system consisting of a gas-liquid separator separating the gas and the gas-liquid analyzer connected thereto,

In order to calibrate for the accuracy of the measuring instrument, the pinch valve is first used to supply a zero calibration gas and a span calibration gas, but to be supplied at a set pressure by a buffer tank. The sample pinch valve is opened separately from the valve so that the sample gas is supplied to the calibration gas inlet pipe of the gas-liquid mixer. In the gas-liquid mixer, the absorption gas introduced through the absorption liquid inlet pipe is mixed with the calibration gas, and then the liquid in the gas-liquid separator. By separating only the sample from the calibration gas at the electrode of the gas-liquid analyzer by the ion electrode method,

When the chimney exhaust gas is to be analyzed, first, the supply of the calibration gas is cut off from the sample pinch valve, and then the sample gas collected from the exhaust gas sampling device is supplied to the sample gas inlet pipe of the gas-liquid mixer. In the gas-liquid mixer, after mixing the absorbent liquid introduced through the absorbent liquid inlet tube and the sample gas, the liquid is separated from the gas-liquid separator and the sample gas is analyzed by the ion electrode method in the electrode part of the gas-liquid analyzer.

Hydrogen chloride measuring device and the method of measuring the discharge gas using the same in the continuous automatic measurement system of the exhaust gas of the chimney of the present invention configured as described above using a standard gas gasified at the set pressure of the buffer tank as a calibration liquid to a uniform pressure The sample gas is measured by the supplying system and the method using the same, and in case of calibration, it is required to be calibrated by the certificate of the standard gas company or the inspection institution before calibration. In addition, it can greatly contribute to the certified data calculation, improve the accuracy of the measurement, and provide objective proof, and also has a useful effect of 30 to 50% improvement in response speed compared to the method using a conventional calibration liquid. .

1 is a schematic view showing a gas-liquid mixer and a gas-liquid separator used in a hydrogen chloride measuring instrument of a conventional flue gas measurement system,
Figure 2 is a schematic diagram showing a hydrogen chloride measuring instrument of the conventional flue gas measurement system according to the present invention,
Figure 3 is a schematic configuration diagram showing only the gas-liquid mixer which is a main part of the hydrogen chloride measuring instrument of the chimney exhaust gas measuring system of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, although this invention is demonstrated in detail by preferred embodiment with reference to an accompanying drawing, of course, the scope of the present invention is not limited to this.

Figure 2 is a schematic view showing a hydrogen chloride measuring device of the conventional flue gas measurement system according to the present invention, Figure 3 is a separate gas-liquid mixer which is a main portion of the hydrogen chloride measuring device of the chimney flue gas measurement system of the present invention shown separately It is a schematic block diagram.

Hydrogen chloride measuring device of the continuous automatic measurement system of the exhaust gas according to a preferred embodiment of the present invention as a system for measuring the exhaust gas of the chimney, the exhaust gas sampling device (1), the calibration gas used to analyze the sample collected (4a) (4b), a gas-liquid mixer 2 for mixing the sample gas with the mixed liquid to sample the chimney exhaust gas; A gas-liquid separator 12 which separates the gas-liquids mixed in the gas-liquid mixer 2 again into a gas and a liquid; It consists of an electrode portion 8 for analyzing the sample gas sample components by the potential difference generated when immersed in the liquid discharged from the gas-liquid separator 12.

The calibration gas of the present invention is a standard gas gasified at the set pressure of the buffer tank, and may be composed of a mixed gas of hydrogen chloride (HCl) and nitrogen (N 2 ).

In addition, according to a preferred embodiment of the present invention, the hydrogen chloride measuring device of the exhaust gas measuring system is a buffer tank (5a) (5b) which is a device for maintaining a constant pressure of the standard gas, zero calibration of the standard gas and A pinch valve 6 for selectively adjusting the flow rate of span calibration is included. The buffer tanks 5a and 5b and the valve 6 function to keep the inflow of standard gas into the gas-liquid mixer 2.

According to another preferred embodiment of the present invention, the sample gas may be configured such that the inflow amount is controlled by the sample pinch valve 7 for adjusting the flow rate.

The sample gas and the standard gas in which the inflow amount is adjusted as described above are introduced into the gas-liquid mixer 2 in which the sample gas and the standard gas are mixed and mixed, so that the sample gas and the standard gas are used for the analysis of the exhaust gas of the chimney.

According to another preferred embodiment of the present invention, the gas-liquid mixer 2 is a sample gas inlet tube 21, absorbent liquid inlet tube 22, calibration gas inlet tube 24 and gas liquid discharge tube (as shown in FIG. 23) is attached.

To explain in more detail the configuration of the present invention, the upper portion of the gas-liquid mixer (2) is provided with the absorbent liquid inlet pipe 22 and the sample gas inlet pipe (21), the lower portion of the sample while the gas mixture is mixed A gas-liquid discharge pipe 23 for supplying the gas-liquid separator 12 is provided, and a calibration gas inlet pipe 24 is further provided at a corresponding position of the sample gas inlet pipe 21.

The calibration material uses standard gas gasified at the set pressure of the buffer tank, and zero calibration gas 4a and span calibration gas 4b having different concentrations are used as standard gases. The calibration gas 4a, 4b is connected to the pinch valve 6 in three directions so that it can be selectively supplied, and the calibration gas via the pinch valve 6 is a calibration gas inlet pipe of the gas-liquid mixer 2 ( The sample pinch valve (7) is provided between the pinch valve (6) and the correction gas inlet tube (24) so as to be introduced into the 24, and selectively supplied between the sample gas and the correction gas.

On the other hand, the absorbent liquid introduced into the absorbent liquid inlet pipe 22 is composed of a mixture of sodium nitrate (NaNO 3 ) and distilled water.

According to another preferred embodiment of the present invention, the pinch valve 6 connected between the buffer tanks 5a and 5b can be attached with a flow meter, and the flow rate is kept constant.

When explaining the method for measuring the exhaust gas using a hydrogen chloride measuring instrument of the continuous automatic measurement system of exhaust gas of the chimney according to the present invention, the exhaust gas measuring method of the present invention, for measuring the exhaust gas of the chimney, exhaust gas sampling device ( 1), a calibration material used to analyze the collected sample, a gas-liquid mixer (2) for mixing a sample gas with an absorbent liquid for sample analysis of the chimney exhaust gas, and a gas-liquid separator for separating and discharging liquid and gas ( 12) Analyze the exhaust gas using the hydrogen chloride meter in the continuous automatic measurement system of exhaust gas composed of the gas-liquid analyzer connected thereto.

In the present invention, in order to calibrate for the accuracy of the measuring instrument, the pinch valve 6 is first used to supply a zero calibration gas 4a and a span calibration gas 4b. A sample pinch valve 7 is opened separately from the pinch valve 6 so that the sample gas is supplied at a set pressure by the tanks 5a and 5b so that the sample gas is supplied to the calibration gas inlet tube 24 of the gas-liquid mixer 2. By being supplied to the gas-liquid mixer 2, after mixing the absorbent liquid introduced through the absorbent liquid inlet pipe 22 and the calibration gas, the mixed liquid is discharged through the liquid discharge pipe 23 to the gas-liquid separator 12 The liquid is supplied from the gas-liquid separator 12 to separate only the liquid, and the calibration gas is analyzed by the ion electrode method in the electrode part 8 of the gas-liquid analyzer.

In addition, when the chimney exhaust gas is to be analyzed, first, the supply of the calibration gas from the sample pinch valve 7 is cut off, and then the sample gas collected from the exhaust gas sampling device 1 is the gas-liquid mixer 2. By supplying the sample gas inlet pipe 21 of the, the gas-liquid mixer 2, after mixing the absorbent liquid introduced through the absorbent liquid inlet pipe 22 and the sample gas, the mixed liquid through the liquid discharge pipe 23 The liquid is discharged and supplied to the gas-liquid separator 12, and only the liquid is separated from the gas-liquid separator 2 so that the sample gas is sampled by the ion electrode method in the electrode part 8 of the gas-liquid analyzer.

In the system and method of the present invention configured as described above, since the standard gas is used, when the hydrogen chloride of the exhaust gas is measured by a conventional ion electrode method, the calibration liquid is imported at the time of span calibration or the assembly company itself. After the type approval or installation, it has been used in integrated inspection or accuracy inspection. Since the inspection agency is a foreign product, the domestic standard is not applied and the calibration is performed according to the calibration liquid of the foreign product. I was able to resolve the shortcomings that could not be confirmed.

1: Exhaust gas sampling device 2: Gas-liquid mixer
3: absorbent liquid 4a: zero calibration gas
4b: span calibration gas 5a, 5b: buffer tank
6: Pinch Valve 7: Sample Pinch Valve
8: electrode part 9: electronic dehumidifier
10: metering tube 11: drain container
12: gas-liquid separator 21: sample gas inlet pipe
22: absorbent liquid inlet pipe 23: gas-liquid discharge pipe
24: calibration gas inlet pipe

Claims (2)

An exhaust gas sampling device for measuring the exhaust gas of the chimney; A calibration material used to analyze the sample taken; A gas-liquid mixer for mixing the sample gas with the mixed liquid to sample the flue gas; A gas-liquid separator for separating the gas-liquids mixed in the gas-liquid mixer again into a gas and a liquid; In the continuous automatic gas discharge measurement system consisting of an electrode unit for analyzing the sample gas sample components by the potential difference generated when the liquid is discharged from the gas-liquid separator,
An upper portion of the gas-liquid mixer is provided with an absorption liquid inlet tube and a sample gas inlet tube, and a lower portion of the gas-liquid mixer is provided with a gas-liquid discharge tube for supplying the sample to the gas-liquid separator with the gas-liquid mixed therein. The calibration gas inlet pipe is additionally provided at the location,
The calibration material uses standard gas gasified at the set pressure of the buffer tank, and zero calibration gas and span calibration gas having different concentrations are used as standard gases, and each calibration gas is selectively supplied. Three-way pinch valve is connected so that the calibration gas through the pinch valve is introduced into the calibration gas inlet pipe of the gas-liquid mixer, and the pinch valve and the calibration gas can be selectively supplied between the sample gas and the calibration gas. A continuous automatic measurement system of the exhaust gas of the chimney, characterized in that a sample pinch valve is provided between the gas inlet pipe. An exhaust gas sampling device for measuring the exhaust gas of the chimney, a calibration material used to analyze the collected sample, a gas-liquid mixer for mixing the sample gas with the mixed liquid to sample the chimney exhaust gas, Hydrogen chloride meter is used in the continuous gas automatic measurement system composed of gas-liquid separator and gas-liquid analyzer connected to it.
In order to calibrate for the accuracy of the measuring instrument, the pinch valve is first used to supply a zero calibration gas and a span calibration gas, but to be supplied at a set pressure by a buffer tank. The sample pinch valve is opened separately from the valve so that the sample gas is supplied to the calibration gas inlet pipe of the gas-liquid mixer. In the gas-liquid mixer, the absorption gas introduced through the absorption liquid inlet pipe is mixed with the calibration gas, and then the liquid in the gas-liquid separator. By separating only the sample from the calibration gas at the electrode of the gas-liquid analyzer by the ion electrode method,
When the chimney exhaust gas is to be analyzed, first, the supply of the calibration gas is cut off from the sample pinch valve, and then the sample gas collected from the exhaust gas sampling device is supplied to the sample gas inlet pipe of the gas-liquid mixer. In the gas-liquid mixer, after mixing the absorbent liquid introduced through the absorbent liquid inlet pipe and the sample gas, the liquid is separated from the gas-liquid separator and the sample gas is analyzed by the ion electrode method in the electrode part of the gas-liquid analyzer. Emission gas measurement method using hydrogen chloride meter in continuous automatic measurement system.
KR1020100095828A 2010-10-01 2010-10-01 Measuring apparatus of hydrochloride among a continuous auto-measuring system for exhaust gas of chimney and measuring method for exhaust gas using the same KR101030931B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101359940B1 (en) * 2013-06-24 2014-02-10 주식회사 위드텍 Stack exhaust gas online monitoring system
KR101940501B1 (en) * 2018-06-12 2019-01-22 황성철 Contact type portable gas analyzer
KR20200113343A (en) 2019-03-25 2020-10-07 주식회사 글로벤스 Automatic sampling system for collecting air pollutants and bad odor compounds
KR20220043438A (en) 2020-09-29 2022-04-05 창원대학교 산학협력단 Method for testing the degree of damage from exposure to harmful gases using saliva
KR20220043440A (en) 2020-09-29 2022-04-05 창원대학교 산학협력단 Saliva treatment kit for testing the degree of damage from exposure to harmful gases

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Publication number Priority date Publication date Assignee Title
JPS5759155A (en) 1980-09-26 1982-04-09 Hitachi Ltd Apparatus for analysis of gaseous sulfurous acid
JPS57201850A (en) 1981-06-05 1982-12-10 Kimoto Denshi Kogyo Kk Analysing method for nitrogen in forms of nitrous acil and nitric acil
JP2001050932A (en) 1999-08-11 2001-02-23 Meidensha Corp Ammonium nitrogen concentration measurement method and device
US20100159602A1 (en) 2007-09-05 2010-06-24 Conway Gregory B Carbon measurement in aqueous samples using oxidation at elevated temperatures and pressures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759155A (en) 1980-09-26 1982-04-09 Hitachi Ltd Apparatus for analysis of gaseous sulfurous acid
JPS57201850A (en) 1981-06-05 1982-12-10 Kimoto Denshi Kogyo Kk Analysing method for nitrogen in forms of nitrous acil and nitric acil
JP2001050932A (en) 1999-08-11 2001-02-23 Meidensha Corp Ammonium nitrogen concentration measurement method and device
US20100159602A1 (en) 2007-09-05 2010-06-24 Conway Gregory B Carbon measurement in aqueous samples using oxidation at elevated temperatures and pressures

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101359940B1 (en) * 2013-06-24 2014-02-10 주식회사 위드텍 Stack exhaust gas online monitoring system
KR101940501B1 (en) * 2018-06-12 2019-01-22 황성철 Contact type portable gas analyzer
KR20200113343A (en) 2019-03-25 2020-10-07 주식회사 글로벤스 Automatic sampling system for collecting air pollutants and bad odor compounds
KR20220043438A (en) 2020-09-29 2022-04-05 창원대학교 산학협력단 Method for testing the degree of damage from exposure to harmful gases using saliva
KR20220043440A (en) 2020-09-29 2022-04-05 창원대학교 산학협력단 Saliva treatment kit for testing the degree of damage from exposure to harmful gases

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