FR2208530A5 - Photodissociation gas detector - operating with UV radiation of threshold energy - Google Patents

Photodissociation gas detector - operating with UV radiation of threshold energy

Info

Publication number
FR2208530A5
FR2208530A5 FR7241585A FR7241585A FR2208530A5 FR 2208530 A5 FR2208530 A5 FR 2208530A5 FR 7241585 A FR7241585 A FR 7241585A FR 7241585 A FR7241585 A FR 7241585A FR 2208530 A5 FR2208530 A5 FR 2208530A5
Authority
FR
France
Prior art keywords
radiation
ionisation
operating
gas detector
induced
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
FR7241585A
Other languages
French (fr)
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.)
DOUCHET HENRI
Original Assignee
DOUCHET HENRI
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 DOUCHET HENRI filed Critical DOUCHET HENRI
Priority to FR7241585A priority Critical patent/FR2208530A5/en
Application granted granted Critical
Publication of FR2208530A5 publication Critical patent/FR2208530A5/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Optical Measuring Cells (AREA)

Abstract

Concentration of aphotodissociable molecular species in a gas, e.g. N2O3 right arrow NO+ + NO2-, is measured by an ionic mobility spectrometer, a mass spectrometer, or a detection cell comprising 2 stainless steel electrodes connected across a low potential via a pico-ammeter; ionisation being induced by UV radiation of wavelength exceeding 1000 angstroms, such that its energy reaches that of threshold given by e.g. ionisation potential NO+ + bond energy - electron affinity of NO2-, figures for such constants being available from cited literature. Ionisation is selectived, unlike that induced by known methods, e.g. by alpha irradiation.
FR7241585A 1972-11-23 1972-11-23 Photodissociation gas detector - operating with UV radiation of threshold energy Expired FR2208530A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7241585A FR2208530A5 (en) 1972-11-23 1972-11-23 Photodissociation gas detector - operating with UV radiation of threshold energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7241585A FR2208530A5 (en) 1972-11-23 1972-11-23 Photodissociation gas detector - operating with UV radiation of threshold energy

Publications (1)

Publication Number Publication Date
FR2208530A5 true FR2208530A5 (en) 1974-06-21

Family

ID=9107561

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7241585A Expired FR2208530A5 (en) 1972-11-23 1972-11-23 Photodissociation gas detector - operating with UV radiation of threshold energy

Country Status (1)

Country Link
FR (1) FR2208530A5 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057076A1 (en) * 1981-01-26 1982-08-04 Honeywell Inc. Apparatus for detecting and measuring trace gases in air or other gaseous background
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method
WO1994027141A1 (en) * 1993-05-12 1994-11-24 Rae Systems, Inc. Photo-ionization detector for detecting volatile organic gases
CN107064117A (en) * 2017-04-27 2017-08-18 四川理工学院 Nitrogen oxides and peroxyacetyl nitrate joint on-line measuring device and method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057076A1 (en) * 1981-01-26 1982-08-04 Honeywell Inc. Apparatus for detecting and measuring trace gases in air or other gaseous background
EP0524022A1 (en) * 1991-07-19 1993-01-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Gas detection device and method
WO1993002354A1 (en) * 1991-07-19 1993-02-04 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Gas detection device and method
GB2272297A (en) * 1991-07-19 1994-05-11 Secr Defence Gas detection device and method
GB2272297B (en) * 1991-07-19 1995-05-17 Secr Defence Gas detection device and method
AU660703B2 (en) * 1991-07-19 1995-07-06 Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland, The Gas detection device and method
US5572137A (en) * 1991-07-19 1996-11-05 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Portable device for detecting UV light ionizable gas or vapor
WO1994027141A1 (en) * 1993-05-12 1994-11-24 Rae Systems, Inc. Photo-ionization detector for detecting volatile organic gases
CN107064117A (en) * 2017-04-27 2017-08-18 四川理工学院 Nitrogen oxides and peroxyacetyl nitrate joint on-line measuring device and method
CN107064117B (en) * 2017-04-27 2019-05-14 四川理工学院 Nitrogen oxides and peroxyacetyl nitrate joint on-line measuring device and method

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Legal Events

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