JPS5459188A - Infrared spectrophotometer apparatus of gas chromatography - Google Patents
Infrared spectrophotometer apparatus of gas chromatographyInfo
- Publication number
- JPS5459188A JPS5459188A JP12630877A JP12630877A JPS5459188A JP S5459188 A JPS5459188 A JP S5459188A JP 12630877 A JP12630877 A JP 12630877A JP 12630877 A JP12630877 A JP 12630877A JP S5459188 A JPS5459188 A JP S5459188A
- Authority
- JP
- Japan
- Prior art keywords
- cell
- gas
- valve
- opto
- trap
- 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.)
- Pending
Links
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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
-
- 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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
Abstract
PURPOSE:To make possible the spectral measurement of high sensitivity even if the separated component gas is of low concentration by radiating wavelength variable laser to the specimen introduced into an opto-acoustic cell. CONSTITUTION:The effluent components from a gas chromatograph 1 are captured in a trap 5 via valve 3 and channel changeover valve 4. Next, the valve 3 is changed over to a carrier gas generator 2 and the carrier gas is introduced into the trap 5 which has been elevated of temperature, whereby the captured components are introduced into an opto-acoustic cell 7. Next, when the component gas having been introduced into the cell 7 absorbes modulated laser light by the chopper 11 from a wavelength variable laser 10, the absorption energy becomes heat, causing the sound pressure of the cell 7 to change. This change in the sound pressure is detected with a microphone 12, and is amplified with a lock-im amplifier 13, the output whereof is then divided by the output of a laser power meter 14 in a ratio meter 16, thus the concentration of the component may be detected as a function of wavelengths in a recorder 18 with high sensitivity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12630877A JPS5459188A (en) | 1977-10-19 | 1977-10-19 | Infrared spectrophotometer apparatus of gas chromatography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12630877A JPS5459188A (en) | 1977-10-19 | 1977-10-19 | Infrared spectrophotometer apparatus of gas chromatography |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5459188A true JPS5459188A (en) | 1979-05-12 |
Family
ID=14931966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12630877A Pending JPS5459188A (en) | 1977-10-19 | 1977-10-19 | Infrared spectrophotometer apparatus of gas chromatography |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5459188A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5610230A (en) * | 1979-07-04 | 1981-02-02 | Hitachi Ltd | Optical sound spectroscopic analyzer |
DE3139917A1 (en) * | 1980-10-07 | 1982-06-24 | Tsuguo Kodaira Tokyo Sawada | "PHOTOACOUSTIC FLOW DETECTOR" |
GB2357846A (en) * | 1997-03-07 | 2001-07-04 | Optel Instr Ltd | Establishing a photoacoustic signal in a biological measurement system |
JP2015219026A (en) * | 2014-05-14 | 2015-12-07 | 昭和電工株式会社 | Photoacoustic spectroscopic method and photoacoustic spectroscopic device |
-
1977
- 1977-10-19 JP JP12630877A patent/JPS5459188A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5610230A (en) * | 1979-07-04 | 1981-02-02 | Hitachi Ltd | Optical sound spectroscopic analyzer |
JPS6321130B2 (en) * | 1979-07-04 | 1988-05-02 | Hitachi Ltd | |
DE3139917A1 (en) * | 1980-10-07 | 1982-06-24 | Tsuguo Kodaira Tokyo Sawada | "PHOTOACOUSTIC FLOW DETECTOR" |
GB2357846A (en) * | 1997-03-07 | 2001-07-04 | Optel Instr Ltd | Establishing a photoacoustic signal in a biological measurement system |
GB2357844A (en) * | 1997-03-07 | 2001-07-04 | Optel Instr Ltd | Normalising a photoacoustic signal in a biological measurement system |
GB2357846B (en) * | 1997-03-07 | 2001-10-17 | Optel Instr Ltd | Biological measurement system |
JP2015219026A (en) * | 2014-05-14 | 2015-12-07 | 昭和電工株式会社 | Photoacoustic spectroscopic method and photoacoustic spectroscopic device |
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