DE623659C - - Google Patents
Info
- Publication number
- DE623659C DE623659C DENDAT623659D DE623659DA DE623659C DE 623659 C DE623659 C DE 623659C DE NDAT623659 D DENDAT623659 D DE NDAT623659D DE 623659D A DE623659D A DE 623659DA DE 623659 C DE623659 C DE 623659C
- Authority
- DE
- Germany
- Prior art keywords
- gas
- electrodes
- electrode
- coating
- radioactive
- 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.)
- Active
Links
- 239000000941 radioactive substance Substances 0.000 claims description 2
- 238000004868 gas analysis Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000002285 radioactive Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 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
- G01N27/62—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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Description
Zur Analyse von Gasen ist es schon vorgeschlagen worden, das zu untersuchende Gasgemisch zwischen zwei Elektroden verschiedenen Potentials zu bringen, die eine dieser Elektroden zwecks Erzielung einer Elektronenemission und Ionisation des Gases zu 'erhitzen und den elektrischen Strom zwischen den Elektroden, zu messen.It has already been proposed for the analysis of gases been, the gas mixture to be examined between two electrodes different Bring potential to one of these electrodes in order to achieve a Electron emission and ionization of the gas to 'heat up and the electric current between the electrodes.
Dieses Verfahren ist mit verschiedenen. Nachteilen behaftet. Es; erfordert eine Hilfsenergiequelle zur Erhitzung der Elektrode und infolgedessen einen erheblichen Energieverbrauch; außerdem erschwert diese besondere Energiequelle den Transport des Apparates. Ferner kann die Heizung der Elektrode die Zusammensetzung des Gases verändern. This procedure is different with. Disadvantages. It; requires an auxiliary power source to heat the electrode and, as a result, a significant consumption of energy; In addition, this particular source of energy makes it difficult to transport the device. Furthermore, the heating of the electrode can change the composition of the gas.
Zur Vermeidung dieser Nachteile wird gemäß der Erfindung· die Ionisation des Gases dadurch bewirkt, daß eine der beiden Elektroden mit .einer radioaktiven Substanz überzogen ist.To avoid these disadvantages, according to the invention, the ionization of the gas this causes one of the two electrodes to be coated with a radioactive substance is.
Die Zeichnung zeigt eine schematische Darstellung eines derartigen Apparates. In einem Mantel 3 behebiger Gestalt mit Öffnungen 4 und 5 zur Zu- und Ableitung des zu untersuchenden Gases befindet sich ein aus !elektrisch leitendem Material bestehender Zylinder 1, auf dessen innerer Fläche sich 'ein ebenfalls elektrisch leitender Überzug 2 als Träger von radioaktiven Elementen befindet. In dem Zylinder liegt ferner isoliert eine Elektrode 6.The drawing shows a schematic representation of such an apparatus. In a shell 3 behebiger shape with openings 4 and 5 for supply and discharge of the The gas to be examined contains an electrically conductive material Cylinder 1, on the inner surface of which there is also an electrically conductive coating 2 is located as a carrier of radioactive elements. In the cylinder is also isolated an electrode 6.
Der Zylinder 1 und der Überzug 2 sind mit dem negativen Pol einer Elektrizitätsiqueile 7 verbunden, während die Elektrode 6 mit dem positiven Pol dieser Quelle über ■ein Potentiometers und einen Widerstand9 verbunden ist. Die Elektrode 6 ist gleichzeitig 4.0 mit dem Gitter 10 einer Elektronenröhre verbunden, deren Heizbatterie bei 11 und deren Anodenbatterie bei 12 zn erkennen ist. In dem die Glühkathode und die Platte der Röhre verbindenden Stromkreis ist ein Meßinstrument eingeschaltet, z. B. ein Muliamperemeter 13 oder ein beliebiges Registrierinstrument 1312 oder ein Relais 14, das einen Kreis 15 regelt, von dem andere Prüfungs- oder Meldeapparate oder auch Ventilatoren betrieben werden können.The cylinder 1 and the coating 2 are connected to the negative pole of an electricity source 7, while the electrode 6 is connected to the positive pole of this source via a potentiometer and a resistor 9. The electrode 6 is simultaneously connected to the grid 10 of an electron tube, the heating battery of which can be seen at 11 and the anode battery at 12 zn . In the circuit connecting the hot cathode and the plate of the tube, a measuring instrument is switched on, e.g. B. a multi-ammeter 13 or any recording instrument 13 12 or a relay 14 that controls a circuit 15 from which other testing or reporting apparatus or fans can be operated.
Unter dem Einfluß des elektrischen Feldes, das zwischen den Elektroden 1 und 6 erzeugt wird, werden die Gasmoleküle, die zwischen den Elektroden liegen, durch die von dem Überzug 2 ständig ausgesandten radioaktiven Teilchen zur Dissoziation gebracht. Die hierbei entstehenden positiven und negativen Ladungen bilden einen elektrischen Strom, der von den physikalischen und chemischen Konstanten des Gases oder Gasgemisches abhängt.Under the influence of the electric field between the electrodes 1 and 6 is generated, the gas molecules that lie between the electrodes are caused by the caused by the coating 2 constantly emitted radioactive particles to dissociate. The resulting positive and negative charges form an electrical current that is carried by the physical and chemical constants of the gas or gas mixture depends.
Je nach der zu erzielenden Verstärkung kann man anstatt einer auch mehrere Elektronenröhren verwenden. Die Form und Anordnung der Elektroden können auch in weiten Grenzen geändert werden. Die Elektroden können z. B. aus ,einfachen parallelen Platten bestehen, deren eine den radioaktiven Überzug enthält.Depending on the gain to be achieved, several electron tubes can be used instead of one use. The shape and arrangement of the electrodes can also be changed within wide limits. The electrodes can e.g. B. consist of simple parallel plates, one of which is the radioactive Includes coating.
Ein zu prüfender Gasstrom (z. B. ein Luftstrom in einem Bergstollen) kann durch Röhren, z. B. Venturiröhren, auf die Elektroden gerichtet werden.A gas flow to be tested (e.g. an air flow in a mountain tunnel) can through pipes, z. B. Venturi tubes, onto the electrodes be judged.
Die im Ausgangskreis der Verstärkerröhre erzeugten elektrischen Ströme können elektrisch, optisch oder akustisch fernsignalisiert werden.The electrical currents generated in the output circuit of the amplifier tube can be electrical, be optically or acoustically signaled remotely.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE623659C true DE623659C (en) |
Family
ID=576620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT623659D Active DE623659C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE623659C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2450459A (en) * | 1944-01-13 | 1948-10-05 | Photoswitch Inc | Electrode system |
DE1086460B (en) * | 1957-12-05 | 1960-08-04 | Mine Safety Appliances Co | Method and device for the quantitative detection of gas traces of a gaseous mixture from ionization current measurements |
WO1992018859A1 (en) * | 1991-04-09 | 1992-10-29 | Bruker-Saxonia Analytik Gmbh | Method and device for detecting substances in an ambient substance, in particular for detecting chemical warfare agents |
US5567595A (en) * | 1989-12-13 | 1996-10-22 | Genelabs Diagnostics Pte Ltd. | Analytical apparatus and method for automated blot assay |
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0
- DE DENDAT623659D patent/DE623659C/de active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2450459A (en) * | 1944-01-13 | 1948-10-05 | Photoswitch Inc | Electrode system |
DE1086460B (en) * | 1957-12-05 | 1960-08-04 | Mine Safety Appliances Co | Method and device for the quantitative detection of gas traces of a gaseous mixture from ionization current measurements |
US5567595A (en) * | 1989-12-13 | 1996-10-22 | Genelabs Diagnostics Pte Ltd. | Analytical apparatus and method for automated blot assay |
WO1992018859A1 (en) * | 1991-04-09 | 1992-10-29 | Bruker-Saxonia Analytik Gmbh | Method and device for detecting substances in an ambient substance, in particular for detecting chemical warfare agents |
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