DE2933921C2 - Thermischer Leitfähigkeitsdetektor, insbesondere für Gaschromatographen - Google Patents
Thermischer Leitfähigkeitsdetektor, insbesondere für GaschromatographenInfo
- Publication number
- DE2933921C2 DE2933921C2 DE2933921A DE2933921A DE2933921C2 DE 2933921 C2 DE2933921 C2 DE 2933921C2 DE 2933921 A DE2933921 A DE 2933921A DE 2933921 A DE2933921 A DE 2933921A DE 2933921 C2 DE2933921 C2 DE 2933921C2
- Authority
- DE
- Germany
- Prior art keywords
- cell
- gas
- flow
- signal
- thermal conductivity
- 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
Links
- 230000001360 synchronised effect Effects 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims 5
- 239000007789 gas Substances 0.000 description 91
- 210000004027 cell Anatomy 0.000 description 66
- 238000010438 heat treatment Methods 0.000 description 32
- 239000012159 carrier gas Substances 0.000 description 14
- 230000005669 field effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000357 thermal conductivity detection Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
-
- 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
- G01N30/64—Electrical detectors
- G01N30/66—Thermal conductivity detectors
-
- 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
- G01N33/0026—General constructional details of gas analysers, e.g. portable test equipment using an alternating circulation of another gas
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/949,312 US4185490A (en) | 1978-10-06 | 1978-10-06 | Phase discrimination in modulated thermal conductivity detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2933921A1 DE2933921A1 (de) | 1980-04-24 |
| DE2933921C2 true DE2933921C2 (de) | 1983-10-13 |
Family
ID=25488893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2933921A Expired DE2933921C2 (de) | 1978-10-06 | 1979-08-22 | Thermischer Leitfähigkeitsdetektor, insbesondere für Gaschromatographen |
Country Status (4)
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309898A (en) * | 1980-06-19 | 1982-01-12 | Phillips Petroleum Co. | Signal-to-noise ratio in chromatographic analysis |
| US4316381A (en) * | 1980-07-14 | 1982-02-23 | Hewlett-Packard Company | Modulated detector |
| US4316382A (en) * | 1980-07-21 | 1982-02-23 | Hewlett-Packard Company | Detector with intermittent flow |
| US4464925A (en) * | 1982-05-17 | 1984-08-14 | Hewlett-Packard Company | Hydrogen, deuterium thermal conductivity detector |
| GB2131180B (en) * | 1982-10-28 | 1986-06-25 | Yokogawa Hokushin Electric | Thermal conductivity detector for use with gas chromatograph |
| US4517824A (en) * | 1983-07-01 | 1985-05-21 | Hewlett-Packard Company | Solvent dumping apparatus |
| JPS60102558A (ja) * | 1983-11-04 | 1985-06-06 | バリアン・アソシエイツ・インコーポレイテツド | ガスクロマトグラフイーのための試料変調セル |
| JPS60152943A (ja) * | 1984-01-20 | 1985-08-12 | Snow Brand Milk Prod Co Ltd | 液体または半固体状物質の物性変化の測定方法 |
| US4735082A (en) * | 1986-07-14 | 1988-04-05 | Hewlett-Packard Company | Pulse modulated thermal conductivity detector |
| FR2623289A1 (fr) * | 1987-11-12 | 1989-05-19 | Tolectromed Sarl | Principe d'identification de concentration d'oxygene permettant d'indiquer la teneur en oxygene d'air enrichi en oxygene |
| US4856319A (en) * | 1988-05-31 | 1989-08-15 | The Perkin-Elmer Corporation | Thermally switchable katharometer |
| US5168746A (en) * | 1991-06-03 | 1992-12-08 | Hughes Aircraft Company | Ambient ether vapor testing apparatus and method |
| JP2570938B2 (ja) * | 1991-12-20 | 1997-01-16 | 株式会社島津製作所 | ガスクロマトグラフＡｒ分析システム |
| US5587520A (en) * | 1995-09-29 | 1996-12-24 | Hewlett-Packard Company | Thermal conductivity detector |
| WO2004068134A1 (en) * | 2003-01-29 | 2004-08-12 | Agilent Technologies, Inc. | Apparatus and method for thermal conductivity detection in gas chromatography equipment |
| US20080291966A1 (en) * | 2007-05-24 | 2008-11-27 | Engel Steven J | Thermal conductivity detector (TCD) having compensated constant temperature element |
| US20090084177A1 (en) * | 2007-09-27 | 2009-04-02 | Ao Xiaolei S | Thermal flow measurement system and method |
| US9128028B2 (en) | 2010-07-29 | 2015-09-08 | Honeywell International Inc. | Thermal conductivity detectors |
| JP6446985B2 (ja) * | 2014-10-10 | 2019-01-09 | 株式会社島津製作所 | 熱伝導度検出器及びガスクロマトグラフ |
| US11397156B2 (en) * | 2018-09-13 | 2022-07-26 | Shimadzu Corporation | Thermal conductivity detector |
| US12320789B2 (en) | 2020-10-28 | 2025-06-03 | Shimadzu Corporation | Thermal conductivity detector |
| DE102022118431A1 (de) * | 2022-07-22 | 2024-01-25 | Inficon Gmbh | Schnüffellecksuchvorrichtung mit Halbleitergassensor sowie Verfahren zur Schnüffellecksuche |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2255551A (en) * | 1938-07-30 | 1941-09-09 | Monocel Inc | Single cell thermal conductivity measurements |
| US3967492A (en) * | 1972-05-09 | 1976-07-06 | Instrumentation Specialties Company | Heat of interaction detector |
| GB1545680A (en) * | 1976-06-25 | 1979-05-10 | Instrumentation Specialties Co | Measuring instrument |
| US4254654A (en) * | 1976-10-07 | 1981-03-10 | Hewlett-Packard Company | Modulated fluid detector |
-
1978
- 1978-10-06 US US05/949,312 patent/US4185490A/en not_active Expired - Lifetime
-
1979
- 1979-08-22 DE DE2933921A patent/DE2933921C2/de not_active Expired
- 1979-10-05 JP JP12880579A patent/JPS5550150A/ja active Granted
- 1979-10-06 GB GB7929741A patent/GB2033087B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2933921A1 (de) | 1980-04-24 |
| GB2033087B (en) | 1983-02-09 |
| JPS6161345B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1986-12-25 |
| US4185490A (en) | 1980-01-29 |
| GB2033087A (en) | 1980-05-14 |
| JPS5550150A (en) | 1980-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8128 | New person/name/address of the agent |
Representative=s name: SCHULTE, K., DIPL.-ING., PAT.-ASS., 7030 BOEBLINGE |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |