GB1178868A - Apparatus for Determining the Concentration of Vapours of Halogens or Halogen Compounds - Google Patents

Apparatus for Determining the Concentration of Vapours of Halogens or Halogen Compounds

Info

Publication number
GB1178868A
GB1178868A GB30239/67A GB3023967A GB1178868A GB 1178868 A GB1178868 A GB 1178868A GB 30239/67 A GB30239/67 A GB 30239/67A GB 3023967 A GB3023967 A GB 3023967A GB 1178868 A GB1178868 A GB 1178868A
Authority
GB
United Kingdom
Prior art keywords
alkali
electrode
alkali compound
compound
coil
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
GB30239/67A
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.)
PE Manufacturing GmbH
Original Assignee
Bodenseewerk Perkin Elmer and Co GmbH
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 Bodenseewerk Perkin Elmer and Co GmbH filed Critical Bodenseewerk Perkin Elmer and Co GmbH
Publication of GB1178868A publication Critical patent/GB1178868A/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
    • G01N27/626—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 heat to ionise a gas
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/19—Halogen containing

Abstract

1,178,868. Discharge tubes. BODENSEEWERK PERKIN-ELMER & CO. G.m.b.H. 30 June, 1967 [1 July, 1966; 21 Dec., 1966], No. 30239/67. Heading H1D. [Also in Division G1] In the measurement of the concentration of vapours of halogens or halogen compounds, wherein the vapour flows past two electrodes, one of which is sensitized, so that the current flowing between the electrodes is indicative of the concentration of halogen or its compound present, the " sensitized " electrode comprises a body which is pervious to alkali atoms and contains an alkali compound which is thermally decomposed to produce the alkali. In one embodiment, the electrode includes a ceramic tube 10, Fig. 1, containing an alkali compound 11 and surrounded by a coil 13 serving both as the electrode being connected via voltage source 15 and amplifier 16 to a second mesh electrode 14, and as a heating coil. A further electrode (44), Fig. 6 (not shown), may be provided which is inserted into the alkali compound and is connected via voltage source (45) to coil 13 whereby diffusion of the alkali atoms may be adjusted electrolytically. In a modification, the alkali compound 21, Fig. 2 (not shown), is enclosed in the space between a ceramic tube 17 and casing 22, together with a heating coil 23. The associated electrode is provided by a wire coil 19 and the second electrode by a wire 20 down the centre of the tube 17. In a second embodiment, the " sensitized " electrode comprises a platinum capillary tube (24), Fig. 3 (not shown), filled with the alkali compound, the electrode being heated either by being coiled 25 round a flame, Fig. 4, or by applying an A.C. voltage across its ends, Fig. 5 (not shown). It is found that the alkali atoms diffuse along the grain boundaries of the tube, diffusion being aided by the presence of carbon in the filling. Examples of fillings for this embodiment are graphite mixed with an alkali compound or a carbonaceous alkali compound, e.g. alkali alcoholate. This latter embodiment may be used in conjunction with a flame detector (31), Fig. 5 (not shown).
GB30239/67A 1966-07-01 1967-06-30 Apparatus for Determining the Concentration of Vapours of Halogens or Halogen Compounds Expired GB1178868A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEB0087813 1966-07-01
DEB0089488 1966-10-21

Publications (1)

Publication Number Publication Date
GB1178868A true GB1178868A (en) 1970-01-21

Family

ID=25967965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30239/67A Expired GB1178868A (en) 1966-07-01 1967-06-30 Apparatus for Determining the Concentration of Vapours of Halogens or Halogen Compounds

Country Status (2)

Country Link
US (1) US3535088A (en)
GB (1) GB1178868A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129418A (en) * 1978-02-21 1978-12-12 General Electric Company Discriminating halogen sensor
US4202666A (en) * 1978-02-24 1980-05-13 Tracor, Inc. Method and apparatus for preventing the destruction of an alkali source of a nitrogen-phosphorous detector
US4839143A (en) * 1985-02-15 1989-06-13 Allied-Signal Inc. Selective ionization of gas constituents using electrolytic reactions
US4744954A (en) * 1986-07-11 1988-05-17 Allied-Signal Inc. Amperometric gas sensor containing a solid electrolyte
US5115666A (en) * 1990-02-08 1992-05-26 Sentech Corporation Method of detecting halogen gas in a liquid
US5578271A (en) * 1995-03-01 1996-11-26 O.I. Corporation Tandem photoionization detector and halogen specific detector
US7487662B2 (en) * 2001-12-13 2009-02-10 The University Of Wyoming Research Corporation Volatile organic compound sensor system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550498A (en) * 1947-06-14 1951-04-24 Gen Electric Method and apparatus for electrically detecting vapors and the like
US2979631A (en) * 1958-05-14 1961-04-11 Nat Res Corp Process for the production of ion-emitting surfaces, particularly for halogen leak detectors
US3384457A (en) * 1963-12-04 1968-05-21 Gen Am Transport Ionization detector and sampling system
FR1454765A (en) * 1964-12-04 1966-10-07 Gen Electric Improvements to electrical vapor detectors
US3372994A (en) * 1965-01-08 1968-03-12 Health Education Welfare Usa Flame ionization detector

Also Published As

Publication number Publication date
US3535088A (en) 1970-10-20

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