GB1187417A - Improvements in and relating to Gas-Separators - Google Patents

Improvements in and relating to Gas-Separators

Info

Publication number
GB1187417A
GB1187417A GB04805/68A GB1480568A GB1187417A GB 1187417 A GB1187417 A GB 1187417A GB 04805/68 A GB04805/68 A GB 04805/68A GB 1480568 A GB1480568 A GB 1480568A GB 1187417 A GB1187417 A GB 1187417A
Authority
GB
United Kingdom
Prior art keywords
gases
chromatograph
passing
gas
spectrometer
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
GB04805/68A
Inventor
Peter Merlyn Llewellyn
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1187417A publication Critical patent/GB1187417A/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
    • 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
    • G01N30/02—Column chromatography
    • G01N30/62—Detectors specially adapted therefor
    • G01N30/72—Mass spectrometers
    • G01N30/7206—Mass spectrometers interfaced to gas chromatograph
    • G01N30/722—Mass spectrometers interfaced to gas chromatograph through a gas permeable barrier (membranes, porous layers)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

1,187,417. Separating gases by diffusion. VARIAN ASSOCIATES. 27 March, 1968 [27 March, 1967], No. 14805/68. Addition to 1109160. Heading B1L. In a gas sampling arrangement as described in Specification 1,109,160, and in which two similar membranes are used in series in the gas line to the mass spectrometer, the space between the two membranes is partially evacuated using a vacuum pump, a valve being connected in the line to the pump, so as to provide a control over the quantity of gases passing to the analyser. In this way the ratio of gases to be analysed passing to the mass spectrometer to carrier gas present in the gas flow from the chromatograph can be varied so that large peaks on the chromatograph output can be effectively reduced by cutting down the ratio of gases to analysed passing to the spectrometer so avoiding swamping of the spectrometer which may hinder subsequent analysis, whilst also allowing the detection of smaller peaks from the chromatograph. The valve is manually operated in accordance with the chromatograph output and comprises a magnetically displaceable valve member.
GB04805/68A 1965-12-06 1968-03-27 Improvements in and relating to Gas-Separators Expired GB1187417A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US51179465A 1965-12-06 1965-12-06
US51175665A 1965-12-06 1965-12-06
US55561366A 1966-06-06 1966-06-06
US65323566A 1966-07-06 1966-07-06
US626194A US3398505A (en) 1965-12-06 1967-03-27 Dual stage membrane gas separators with variable conductance means for varying their throughput

Publications (1)

Publication Number Publication Date
GB1187417A true GB1187417A (en) 1970-04-08

Family

ID=24509360

Family Applications (1)

Application Number Title Priority Date Filing Date
GB04805/68A Expired GB1187417A (en) 1965-12-06 1968-03-27 Improvements in and relating to Gas-Separators

Country Status (4)

Country Link
US (1) US3398505A (en)
DE (1) DE1773011A1 (en)
FR (1) FR95043E (en)
GB (1) GB1187417A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929003A (en) * 1969-06-16 1975-12-30 Varian Associates Method and apparatus for detecing materials in a liquid
US3724169A (en) * 1970-02-19 1973-04-03 Aero Vac Corp Delta t bar spectrometer
US3649199A (en) * 1970-03-26 1972-03-14 Varian Associates Method for detecting trace quantities of an organic drug material in a living animal
US4089653A (en) * 1975-07-28 1978-05-16 General Electric Company Apparatus for the separation of hydrogen sulfide from gas mixture including carbon dioxide
HU177965B (en) * 1976-12-23 1982-02-28 Hiradastechnikai Gepgyar Method and apparatus for detecting total organic material content lf gases by means of flame ionization detector
DE3230335C2 (en) * 1982-03-05 1988-10-20 Friedel 4100 Duisburg Genender Bolting of expansion arches for route expansion in mining
US4517461A (en) * 1982-11-29 1985-05-14 Phillips Petroleum Co Carbon isotope analysis of hydrocarbons
US4641541A (en) * 1986-02-11 1987-02-10 Daryl Sharp Internal mass spectrometer interface to a gas chromatograph
US4791292A (en) * 1986-04-24 1988-12-13 The Dow Chemical Company Capillary membrane interface for a mass spectrometer
US4713963A (en) * 1986-06-26 1987-12-22 Daryl Sharp Method and device for vacuum chromatography
US5479815A (en) * 1994-02-24 1996-01-02 Kraft Foods, Inc. Method and apparatus for measuring volatiles released from food products
DE4444524C2 (en) * 1994-11-30 1997-04-03 Inst Umwelttechnologien Gmbh Method and device for the detection of gaseous high molecular weight traces in a carrier gas for quasi real-time measurements in situ
US5469917A (en) * 1994-12-14 1995-11-28 Wolcott; Duane K. Use of capillary-membrane sampling device to monitor oil-drilling muds
US5703359A (en) * 1996-07-29 1997-12-30 Leybold Inficon, Inc. Composite membrane and support assembly
US7361206B1 (en) * 2004-09-07 2008-04-22 United States Of America As Represented By The Secretary Of The Navy Apparatus and method for water vapor removal in an ion mobility spectrometer

Also Published As

Publication number Publication date
FR95043E (en) 1970-03-27
DE1773011A1 (en) 1971-08-12
US3398505A (en) 1968-08-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee