GB1497436A - Apparatus for the detection of volatile organic substance - Google Patents

Apparatus for the detection of volatile organic substance

Info

Publication number
GB1497436A
GB1497436A GB1005475A GB1005475A GB1497436A GB 1497436 A GB1497436 A GB 1497436A GB 1005475 A GB1005475 A GB 1005475A GB 1005475 A GB1005475 A GB 1005475A GB 1497436 A GB1497436 A GB 1497436A
Authority
GB
United Kingdom
Prior art keywords
duct
valve
filament
substances
argon
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
GB1005475A
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.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
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 Pye Ltd filed Critical Pye Ltd
Priority to GB1005475A priority Critical patent/GB1497436A/en
Priority to JP2427276A priority patent/JPS51113787A/en
Priority to DE19762609604 priority patent/DE2609604C2/en
Priority to FR7606838A priority patent/FR2304077A1/en
Priority to US05/868,064 priority patent/US4166379A/en
Publication of GB1497436A publication Critical patent/GB1497436A/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
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

1497436 Analyzing gases electrically PYE (ELECTRONIC PRODUCTS) Ltd 11 March 1975 10054/75 Heading G1N [Also in Division F2] Volatile organic substances in a gaseous mixture are detected by absorbing the substances in a cold filament, heating the filament to release the substances and detecting the released substances with an electron capture detector. Initially filament 9 in duct 8 is cold, pump 22 is off and valve 29 is closed. Since the pressure in valve cavity 2 and hence duct 8 is then above ambient due to the flow of inert gas e.g. from vessel 34 valve 5 is closed to seal sample gas inlet 4 and ball 17 is lifted off its seat to allow the argon to escape from duct 8 via chamber 16 and tube 20 through leakage paths in pump 22. At the same time argon from vessel 34 also flows through restrictor 33, passageways 27, 25, chamber 14 in which is situated electron capture device 23 and into duct 8 where it joins the primary argon stream. Pump 22 is then switched on so that valve 17 is opened and the pressure in duct 8 and cavity fall below atmospheric. Valve 5 lifts off and a sample of gas is drawn in through probe 3 along duct 8 and exhausted via pump 22, any organic volatile substances being absorbed by the filament 9. The argon flow through passageway 13 prevents any of the sample and substances not adsorbed on filament 9 entering chamber 14. When a sufficient sample has been drawn through the apparatus pump 22 is switched off, ball 17 closes passage 15 due to spring 18 and valve 5 closes due to the rise in pressure in duct 8 and cavity 2 caused by the continuing flow of argon. After a time sufficient for the argon flow to sweep any remaining traces of sample air from the duct 8 solenoid 31 is energized to open valve 29. There is now a direct passage to atmosphere via passageway 13, cavity 14, passageway 25 and tube 28 and filament 9 is heated so that any adsorbed volatile organic substance is driven off and is carried by the primary argon flow through the passageway 13 into chamber 14 to reach electron capture detector.
GB1005475A 1975-03-11 1975-03-11 Apparatus for the detection of volatile organic substance Expired GB1497436A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB1005475A GB1497436A (en) 1975-03-11 1975-03-11 Apparatus for the detection of volatile organic substance
JP2427276A JPS51113787A (en) 1975-03-11 1976-03-08 Detector for volatile organic substances
DE19762609604 DE2609604C2 (en) 1975-03-11 1976-03-09 Device for the detection of volatile organic substances
FR7606838A FR2304077A1 (en) 1975-03-11 1976-03-10 APPARATUS FOR DETECTING ORGANIC SUBSTANCES
US05/868,064 US4166379A (en) 1975-03-11 1978-01-09 Apparatus for the detection of volatile organic substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1005475A GB1497436A (en) 1975-03-11 1975-03-11 Apparatus for the detection of volatile organic substance

Publications (1)

Publication Number Publication Date
GB1497436A true GB1497436A (en) 1978-01-12

Family

ID=9960607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1005475A Expired GB1497436A (en) 1975-03-11 1975-03-11 Apparatus for the detection of volatile organic substance

Country Status (4)

Country Link
JP (1) JPS51113787A (en)
DE (1) DE2609604C2 (en)
FR (1) FR2304077A1 (en)
GB (1) GB1497436A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580440A (en) * 1984-07-17 1986-04-08 British Aerospace Public Company Limited, Bracknell Division Method of detecting a contraband substance
CN112082950A (en) * 2020-09-12 2020-12-15 山东诺蓝信息科技有限公司 Volatile organic compounds VOCs check out test set based on wireless transmission technique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052750B (en) * 1979-06-21 1983-03-16 Pye Ltd Trace material detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580440A (en) * 1984-07-17 1986-04-08 British Aerospace Public Company Limited, Bracknell Division Method of detecting a contraband substance
CN112082950A (en) * 2020-09-12 2020-12-15 山东诺蓝信息科技有限公司 Volatile organic compounds VOCs check out test set based on wireless transmission technique
CN112082950B (en) * 2020-09-12 2024-04-30 山东诺蓝信息科技有限公司 Volatile organic compounds VOCs check out test set based on wireless transmission technique

Also Published As

Publication number Publication date
DE2609604A1 (en) 1976-09-30
JPS51113787A (en) 1976-10-07
FR2304077A1 (en) 1976-10-08
DE2609604C2 (en) 1986-01-30
JPS5740976B2 (en) 1982-08-31
FR2304077B1 (en) 1980-03-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee