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GB655713A - Improvements in quantitative analysis apparatus, in particular for gaseous mixtures - Google Patents

Improvements in quantitative analysis apparatus, in particular for gaseous mixtures

Info

Publication number
GB655713A
GB655713A GB27699/48A GB2769948A GB655713A GB 655713 A GB655713 A GB 655713A GB 27699/48 A GB27699/48 A GB 27699/48A GB 2769948 A GB2769948 A GB 2769948A GB 655713 A GB655713 A GB 655713A
Authority
GB
United Kingdom
Prior art keywords
quantitative analysis
analysis apparatus
gaseous mixtures
circuit
chambers
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.)
Expired
Application number
GB27699/48A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Office National dEtudes et de Recherches Aerospatiales ONERA
Original Assignee
Office National dEtudes et de Recherches Aerospatiales ONERA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA
Publication of GB655713A publication Critical patent/GB655713A/en
Expired legal-status Critical Current

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
    • G01N21/25—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
    • G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

In infra-red gas analysing apparatus in which two chopped beams are passed, one through a comparison tube and the other through a tube containing gas under analysis to a pair of detecting chambers, the capacity variations of a diaphragm joining the chambers and forming with a fixed plate a condenser, are amplified in a circuit the input valve of which produces negative feed-back in its circuit.
GB27699/48A 1948-04-29 1948-10-25 Improvements in quantitative analysis apparatus, in particular for gaseous mixtures Expired GB655713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR655713X 1948-04-29

Publications (1)

Publication Number Publication Date
GB655713A true GB655713A (en) 1951-08-01

Family

ID=9007286

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27699/48A Expired GB655713A (en) 1948-04-29 1948-10-25 Improvements in quantitative analysis apparatus, in particular for gaseous mixtures

Country Status (1)

Country Link
GB (1) GB655713A (en)

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