CA2541393A1 - Gas injection amount determining method in isotope gas analysis, and isotope gas analyzing and measuring method and apparatus - Google Patents
Gas injection amount determining method in isotope gas analysis, and isotope gas analyzing and measuring method and apparatus Download PDFInfo
- Publication number
- CA2541393A1 CA2541393A1 CA002541393A CA2541393A CA2541393A1 CA 2541393 A1 CA2541393 A1 CA 2541393A1 CA 002541393 A CA002541393 A CA 002541393A CA 2541393 A CA2541393 A CA 2541393A CA 2541393 A1 CA2541393 A1 CA 2541393A1
- Authority
- CA
- Canada
- Prior art keywords
- gas
- cell
- measured
- volume
- gas injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract 28
- 239000007924 injection Substances 0.000 title claims abstract 28
- 238000004868 gas analysis Methods 0.000 title claims abstract 6
- 238000000034 method Methods 0.000 title claims 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract 14
- 239000001569 carbon dioxide Substances 0.000 claims abstract 14
- 238000005259 measurement Methods 0.000 claims abstract 9
- 238000011088 calibration curve Methods 0.000 claims abstract 2
- 238000002835 absorbance Methods 0.000 claims 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
- A61B5/0836—Measuring rate of CO2 production
Abstract
As previous processing of measurement in which gas to be measured containing, as gas components, carbon dioxide 13CO2 and carbon dioxide 12CO2, is introduced into a cell, and in which the intensities of transmitted lights having wavelengths suitable for measurement of the respective gas components, are measured and then data-processed to measure the concentrations of the gas components, the air having a predetermined volume Va is sucked by a gas injection device 21, a gas exhaust valve V6 of a cell 11 is closed and the air stored in the gas injection device 21 is transferred to the cell 11 filled with the air at an atmospheric pressure, thereby to pressurize the cell inside. The pressure thus pressurized is measured as P. The cell volume Vc is subtracted from the product obtained by multiplying the sum. V0 of the volume Va and Vc the cell volume Vc, by the ratio P0/P in which P0 is the target pressure of the gas to be measured at which a calibration curve has been prepared for an isotope gas analysis and measurement, thus determining the one-time gas injection amount of the gas injection device 21. Thus, measured concentration variations based on changes in atmospheric pressure can be corrected.
Claims (7)
1. In an isotope gas analysis in which gas to be measured or an expired breath of a human being containing, as gas components, carbon dioxide 13CO2 and carbon dioxide 12CO2, is introduced into a cell, and the intensities of transmitted lights having wavelengths suitable for measurement of the respective gas components, are measured and then data-processed to measure the concentration of the carbon dioxide 13CO2, a gas injection amount determining method comprising the steps of:
filling the cell with the air at an atmospheric pressure;
operating a gas injection device so as to suck the air of a predetermined volume Va, the gas injection device being arranged to inject the gas to be measured into the cell;
transferring the air stored in the gas injection device into the cell to pressurize the cell inside, and measuring the cell inside pressure P; and subtracting the cell volume Vc from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, by the ratio P0/P in which P00 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device.
filling the cell with the air at an atmospheric pressure;
operating a gas injection device so as to suck the air of a predetermined volume Va, the gas injection device being arranged to inject the gas to be measured into the cell;
transferring the air stored in the gas injection device into the cell to pressurize the cell inside, and measuring the cell inside pressure P; and subtracting the cell volume Vc from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, by the ratio P0/P in which P00 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device.
2. A gas injection amount determining method ac-cording to Claim 1, wherein the cell volume Vc includes a net volume of the cell and volumes of pipes, valves, and a pressure sensor which are in connection through the cell.
3 . A gas injection amount determining method according to Claim 1 or Claim 2, wherein the target pressure P0 of the gas to be measured is equal to the gas pressure at which a calibration curve for determining the relationship between absorbance and concentration of carbon dioxide 13CO2, has been prepared.
4. In an isotope gas analyzing and measuring method in which gas to be measured or an expired breath of a human being containing, as gas components, carbon dioxide 13CO2 and carbon dioxide 12CO2, is introduced into a cell, and the intensities of transmitted lights having wavelengths suitable for measurement of the respective gas components, are measured and then data-processed to measure the concentration of the carbon dioxide 13CO2, the isotope gas analyzing and measuring method comprising the steps of:
filling the cell with the air at an atmospheric pressure;
operating a gas injection device so as to suck the air of a predetermined volume Va, the gas injection device being arranged to inject the gas to be measured into the cell;
transferring the air stored in the gas injection device into the cell to pressurize the cell inside, and measuring the cell inside pressure P;
subtracting the cell volume Vc from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, lay the ratio P0/P in which P0 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device; and collecting gas to be measured having the volume thus determined, by the gas injection device, transferring the gas thus collected, into the cell containing gas to be measured at an atmospheric pressure, thereby to pressurize the cell inside, and measuring the concentration of carbon dioxide 13CO2 or the concentration ratio 13CO2/12CO2.
filling the cell with the air at an atmospheric pressure;
operating a gas injection device so as to suck the air of a predetermined volume Va, the gas injection device being arranged to inject the gas to be measured into the cell;
transferring the air stored in the gas injection device into the cell to pressurize the cell inside, and measuring the cell inside pressure P;
subtracting the cell volume Vc from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, lay the ratio P0/P in which P0 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device; and collecting gas to be measured having the volume thus determined, by the gas injection device, transferring the gas thus collected, into the cell containing gas to be measured at an atmospheric pressure, thereby to pressurize the cell inside, and measuring the concentration of carbon dioxide 13CO2 or the concentration ratio 13CO2/12CO2.
5. An isotope gas analyzing and measuring method according to Claim 4, wherein the cell volume Vc includes a net volume of the cell and volumes of pipes, valves and a pressure sensor which are in connection through the cell.
6. In an isotope gas analyzing and measuring apparatus in which gas to be measured or an expired breath of a human being containing, as gas components, carbon dioxide 13CO2 and carbon dioxide 12CO2, is introduced into a cell, and the intensities of transmitted lights having wavelengths suitable for measurement of the respective gas components, are measured and then data-processed to measure the concentration of the carbon dioxide 13CO2, the isotope gas analyzing and measuring apparatus comprising:
a gas injection device for injecting gas into the cell;
gas transferring means for transferring the gas stored in the gas injection device into the cell;
a pressure sensor for measuring the pressure of the gas housed in the cell; and gas injection amount determining means arranged such that the air having a predetermined volume Va is sucked by the gas injection device, that the air stored in the gas injection device is transferred to the cell filled with the air at an atmospheric pressure, thereby to pressurize the cell inside, that the cell inside pressure P is measured, and that the cell volume Vc is subtracted from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, by the ratio P0/P in which P0 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device;
whereby gas to be measured having the volume determined by the gas injection amount determining means, is collected by the gas injection device, the gas thus collected is transferred into the cell filled with gas to be measured at an atmospheric pressure, and the concentration of carbon dioxide 13CO2 or the concentration ratio 13CO2/12CO2 is measured.
a gas injection device for injecting gas into the cell;
gas transferring means for transferring the gas stored in the gas injection device into the cell;
a pressure sensor for measuring the pressure of the gas housed in the cell; and gas injection amount determining means arranged such that the air having a predetermined volume Va is sucked by the gas injection device, that the air stored in the gas injection device is transferred to the cell filled with the air at an atmospheric pressure, thereby to pressurize the cell inside, that the cell inside pressure P is measured, and that the cell volume Vc is subtracted from the product obtained by multiplying the sum V0 of the volume Va and the cell volume Vc, by the ratio P0/P in which P0 is the target pressure of the gas to be measured in isotope gas analysis measurement, thus determining the one-time gas injection amount of the gas injection device;
whereby gas to be measured having the volume determined by the gas injection amount determining means, is collected by the gas injection device, the gas thus collected is transferred into the cell filled with gas to be measured at an atmospheric pressure, and the concentration of carbon dioxide 13CO2 or the concentration ratio 13CO2/12CO2 is measured.
7. An isotope gas analyzing and measuring apparatus according to Claim 6, wherein the cell volume Vc includes a net volume of the cell and volumes of pipes, valves and the pressure sensor which are in connection through the cell.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003373093 | 2003-10-31 | ||
| JP2003-373093 | 2003-10-31 | ||
| PCT/JP2004/016451 WO2005041769A1 (en) | 2003-10-31 | 2004-10-29 | Gas injection amount determining method in isotope gas analysis, and isotope gas analyzing and measuring method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2541393A1 true CA2541393A1 (en) | 2005-05-12 |
| CA2541393C CA2541393C (en) | 2011-05-10 |
Family
ID=34544073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2541393A Expired - Fee Related CA2541393C (en) | 2003-10-31 | 2004-10-29 | Gas injection amount determining method in isotope gas analysis, and isotope gas analyzing and measuring method and apparatus |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US7749436B2 (en) |
| EP (1) | EP1682000B1 (en) |
| JP (1) | JP4435782B2 (en) |
| KR (1) | KR100798584B1 (en) |
| CN (1) | CN100423692C (en) |
| AT (1) | ATE421283T1 (en) |
| BR (1) | BRPI0415915A (en) |
| CA (1) | CA2541393C (en) |
| DE (1) | DE602004019241D1 (en) |
| ES (1) | ES2319903T3 (en) |
| HK (1) | HK1097721A1 (en) |
| PT (1) | PT1682000E (en) |
| TW (1) | TW200523537A (en) |
| WO (1) | WO2005041769A1 (en) |
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| EP1985993B1 (en) * | 2006-02-03 | 2014-12-03 | Otsuka Pharmaceutical Co., Ltd. | Method of exhaled gas measuring and analysis and apparatus therefor |
| DE102006018862A1 (en) * | 2006-03-17 | 2007-09-20 | Charité - Universitätsmedizin Berlin | Device for the spectroscopic analysis of a gas |
| CN102027344B (en) * | 2008-02-15 | 2015-03-18 | 科学技术设备委员会 | Infrared spectrometer |
| CN102308199A (en) * | 2009-02-18 | 2012-01-04 | 株式会社堀场制作所 | Sample analyzing apparatus |
| ES2573811T3 (en) | 2009-12-22 | 2016-06-10 | Merete Medical Gmbh | Bone plaque system for osteosynthesis |
| WO2011140156A2 (en) * | 2010-05-03 | 2011-11-10 | Geoisochem Corporation | Sensor system using a hollow waveguide |
| US9618417B2 (en) * | 2011-10-20 | 2017-04-11 | Picarro, Inc. | Methods for gas leak detection and localization in populated areas using isotope ratio measurements |
| DE102012103894B4 (en) | 2012-05-03 | 2016-10-27 | Merete Medical Gmbh | Bone plate system for osteosynthesis |
| DE202013103647U1 (en) | 2013-08-12 | 2013-09-02 | Aspect Imaging Ltd. | A system for online measurement and control of O2 fraction, CO fraction and CO2 fraction |
| FI125907B (en) * | 2013-09-24 | 2016-03-31 | Vaisala Oyj | Method and apparatus for measuring the concentration of gases dissolved in liquids |
| CN110068541A (en) * | 2014-02-12 | 2019-07-30 | 积水医疗株式会社 | Carbon isotope analysis device and carbon isotope analysis method |
| US10330592B2 (en) * | 2017-07-21 | 2019-06-25 | Serguei Koulikov | Laser absorption spectroscopy isotopic gas analyzer |
| WO2019039584A1 (en) * | 2017-08-24 | 2019-02-28 | 国立大学法人名古屋大学 | Light generating device, and carbon isotope analyzing device and carbon isotope analyzing method employing same |
| WO2020059100A1 (en) * | 2018-09-21 | 2020-03-26 | 大塚電子株式会社 | Measuring device and measuring method |
| JP7153735B2 (en) * | 2018-09-21 | 2022-10-14 | 大塚製薬株式会社 | Signal processing circuit, measuring device, and signal processing method |
| WO2020105118A1 (en) * | 2018-11-20 | 2020-05-28 | 株式会社島津製作所 | Gas measurement device and gas measurement method |
| EP3667315A1 (en) * | 2018-12-12 | 2020-06-17 | HORIBA, Ltd. | Exhaust gas analysis apparatus, exhaust gas analysis method, and correction expression creation method |
| CN110987852A (en) * | 2019-12-27 | 2020-04-10 | 安徽养和医疗器械设备有限公司 | Thirteen carbon infrared spectrometer curve automatic calibration system |
| CN110987851A (en) * | 2019-12-27 | 2020-04-10 | 安徽养和医疗器械设备有限公司 | Double-gas-path carbon thirteen-infrared spectrometer |
| US11131628B1 (en) * | 2020-05-12 | 2021-09-28 | Savannah River Nuclear Solutions, Llc | Spectroscopic methods and systems for isotopic analysis |
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-
2004
- 2004-10-29 WO PCT/JP2004/016451 patent/WO2005041769A1/en active Application Filing
- 2004-10-29 KR KR1020067008263A patent/KR100798584B1/en active IP Right Grant
- 2004-10-29 BR BRPI0415915-2A patent/BRPI0415915A/en not_active IP Right Cessation
- 2004-10-29 TW TW093133205A patent/TW200523537A/en unknown
- 2004-10-29 EP EP04793371A patent/EP1682000B1/en active Active
- 2004-10-29 PT PT04793371T patent/PT1682000E/en unknown
- 2004-10-29 US US10/577,451 patent/US7749436B2/en active Active
- 2004-10-29 DE DE602004019241T patent/DE602004019241D1/en active Active
- 2004-10-29 CA CA2541393A patent/CA2541393C/en not_active Expired - Fee Related
- 2004-10-29 ES ES04793371T patent/ES2319903T3/en active Active
- 2004-10-29 JP JP2006519020A patent/JP4435782B2/en active Active
- 2004-10-29 AT AT04793371T patent/ATE421283T1/en not_active IP Right Cessation
- 2004-10-29 CN CNB2004800318860A patent/CN100423692C/en not_active Expired - Fee Related
-
2007
- 2007-04-24 HK HK07104301.9A patent/HK1097721A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2319903T3 (en) | 2009-05-14 |
| KR100798584B1 (en) | 2008-01-28 |
| PT1682000E (en) | 2009-03-19 |
| BRPI0415915A (en) | 2006-12-26 |
| KR20060064691A (en) | 2006-06-13 |
| JP4435782B2 (en) | 2010-03-24 |
| TW200523537A (en) | 2005-07-16 |
| EP1682000B1 (en) | 2009-01-21 |
| EP1682000A1 (en) | 2006-07-26 |
| CN1874722A (en) | 2006-12-06 |
| CN100423692C (en) | 2008-10-08 |
| ATE421283T1 (en) | 2009-02-15 |
| US20070077167A1 (en) | 2007-04-05 |
| JP2007510131A (en) | 2007-04-19 |
| WO2005041769A1 (en) | 2005-05-12 |
| HK1097721A1 (en) | 2007-07-06 |
| US7749436B2 (en) | 2010-07-06 |
| CA2541393C (en) | 2011-05-10 |
| DE602004019241D1 (en) | 2009-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20171030 |