DE1296836B - Electrode arrangement for polarographic oxygen analysis - Google Patents

Electrode arrangement for polarographic oxygen analysis

Info

Publication number
DE1296836B
DE1296836B DE1962E0023568 DEE0023568A DE1296836B DE 1296836 B DE1296836 B DE 1296836B DE 1962E0023568 DE1962E0023568 DE 1962E0023568 DE E0023568 A DEE0023568 A DE E0023568A DE 1296836 B DE1296836 B DE 1296836B
Authority
DE
Germany
Prior art keywords
face
electrode
noble metal
measuring space
measuring
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.)
Withdrawn
Application number
DE1962E0023568
Other languages
German (de)
Inventor
Eschweiler Wilhelm
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.)
ESCHWEILER AND CO
Original Assignee
ESCHWEILER AND CO
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 ESCHWEILER AND CO filed Critical ESCHWEILER AND CO
Priority to DE1962E0023568 priority Critical patent/DE1296836B/en
Priority to DE1962E0023567 priority patent/DE1260199B/en
Priority to CH1179263A priority patent/CH465272A/en
Publication of DE1296836B publication Critical patent/DE1296836B/en
Withdrawn legal-status Critical Current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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)

Description

Gegenstand des Patents 1 260 199 ist eine Elektrodenanordnung für die polarographische Sauerstoffanalyse mit einem aus elektrisch isolierendem Material bestehenden, in ein Elektrodengehäuse einsetzbaren Elektrodenkopf, in dem ein oder mehrere eingeschmolzene Drähte aus Edelmetall angeordnet sind und vor dessen Stirnfläche mittels einer für das zu analysierende Gas durchlässigen, jedoch für den Meß-Elektrolyten und die zu untersuchende Flüssigkeit undurchlässigen Membran ein Meßraum geringer Ausdehnung abgegrenzt ist, welcher durch eine Verbindungsleitung mit einem Bezugselektrodenraum verbunden ist, welche dadurch gekennzeichnet ist, daß der Elektrodenkopf mindestens längs einer seine Stirnfläche umschließenden Zone unter Bildung eines engen Ringspalts relativ großer Längs- und Quererstreckung in ein Gegenlager im Elektrodengehäuse eingesetzt ist, welcher Ringspalt zwischen Meßraum und Elektrolytflüssigkeitszuführung verläuft und durch eine gasdurchlässige Membran sowie eine Schicht aus saugfähigem Material derart ausgefüllt ist, daß ein erheblich langer Diffusionsweg zwischen Meßraum und Elektrolytflüssigkeitszuführung besteht. The subject of patent 1,260,199 is an electrode arrangement for polarographic oxygen analysis with one made of electrically insulating material, which can be inserted into an electrode housing Electrode head in which one or more fused wires made of precious metal are arranged are and in front of its end face by means of a permeable for the gas to be analyzed, but for the Measuring electrolytes and the liquid to be examined impermeable membrane a measuring space of small extent is delimited, which by a connecting line is connected to a reference electrode space, which is characterized in that the electrode head at least along a zone enclosing its end face to form a narrow annular gap of relatively large longitudinal and transverse extension in a counter bearing in the electrode housing is used, which annular gap runs between the measuring space and the electrolyte liquid supply and so filled by a gas-permeable membrane and a layer of absorbent material is that there is a considerably long diffusion path between the measuring space and the electrolyte liquid supply.

Die Erfindung betrifft eine Weiterentwicklung des Gegenstandes des Hauptpatents und setzt sich die Aufgabe, die Meßzeiten mit der Elektrodenanordnung zu verkürzen, ohne dabei die Meßgenauigkeit zu verschlechtern.The invention relates to a further development of the subject matter of the main patent and continues the Task to shorten the measuring times with the electrode arrangement without thereby reducing the measuring accuracy worsen.

Erfindungsgemäß wird die gestellte Aufgabe dadurch gelöst, daß bei der Elektrodenanordnung gemäß des Hauptpatents die den Meßraum mindestens teilweise ausfüllende saugfähige Schicht an der der Stirnfläche des Edelmetalldrahts bzw. den Stirnflächen der Edelmetalldrähte gegenüberliegenden Stelle eine öffnung aufweist, deren Größe mindestensAccording to the invention, the set object is achieved in that in the electrode arrangement according to of the main patent the absorbent layer at least partially filling the measuring space on the End face of the noble metal wire or the end faces of the noble metal wires opposite Place has an opening whose size is at least

annähernd der Stirnfläche des Edelmetalldrahts entspricht. corresponds approximately to the end face of the noble metal wire.

Claims (1)

Patentanspruch:Claim: Elektrodenanordnung für die polarographische Sauerstoffanalyse mit einem aus elektrisch isolierendem Material bestehenden, in ein Elektrodengehäuse einsetzbaren Elektrodenkopf, in dem ein oder mehrere eingeschmolzene Drähte aus Edelmetall angeordnet sind und vor dessen Stirnfläche mittels einer für das zu analysierende Gas durchlässigen, jedoch für den Meß-Elektrolyten und die zu untersuchende Flüssigkeit undurchlässigen Membran ein Meßraum geringer Ausdehnung abgegrenzt ist, welcher durch eine Verbindungsleitung mit einem Bezugselektrodenraum verbunden ist, wobei der Elektrodenkopf mindestens längs einer seine Stirnfläche umschließenden Zone unter Bildung eines engen Ringspalts relativ großer Längsund Quererstreckung in ein Gegenlager im Elektrodengehäuse eingesetzt ist, welcher Ringspalt zwischen Meßraum und Elektrolytflüssigkeitszuführung verläuft und durch eine gasdurchlässige Membran sowie eine Schicht aus saugfähigem Material derart ausgefüllt ist, daß ein erheblich langer Diffusionsweg zwischen Meßraum und Elektrolytflüssigkeitszuführung besteht, nach Patent 1 260 199,dadurchgekennzeichnet, daß die den Meßraum mindestens teilweise ausfüllende saugfähige Schicht an der der Stirnfläche des Edelmetalldrahts bzw. den Stirnflächen der Edelmetalldrähte gegenüberliegenden Stelle eine Öffnung aufweist, deren Größe mindestens annähernd der Stirnfläche des Edelmetalldrahts entspricht. Electrode arrangement for polarographic oxygen analysis with an electrically insulating Material existing, in an electrode housing insertable electrode head in which a or several fused wires made of noble metal are arranged and in front of its end face by means of a permeable for the gas to be analyzed, but for the measuring electrolyte and the liquid to be examined impermeable membrane delimits a measuring space of small extent which is connected to a reference electrode compartment by a connecting line, wherein the electrode head is formed at least along a zone enclosing its end face a narrow annular gap of relatively large longitudinal and transverse extension in a counter bearing in the electrode housing is used, which annular gap between the measuring space and the electrolyte liquid supply runs through a gas-permeable membrane and a layer of absorbent Material is filled in such a way that a considerably long diffusion path between the measuring space and There is an electrolyte liquid supply, according to patent 1 260 199, characterized in that that the absorbent layer at least partially filling the measuring space on that of the end face of the noble metal wire or the end faces of the noble metal wires opposite point Has opening, the size of which corresponds at least approximately to the end face of the noble metal wire.
DE1962E0023568 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis Withdrawn DE1296836B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1962E0023568 DE1296836B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis
DE1962E0023567 DE1260199B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis
CH1179263A CH465272A (en) 1962-09-22 1963-09-23 Device for polarographic determination of the partial pressure of a gas in liquids containing gases

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1962E0023568 DE1296836B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis
DE1962E0023567 DE1260199B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis

Publications (1)

Publication Number Publication Date
DE1296836B true DE1296836B (en) 1969-06-04

Family

ID=25973117

Family Applications (2)

Application Number Title Priority Date Filing Date
DE1962E0023568 Withdrawn DE1296836B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis
DE1962E0023567 Withdrawn DE1260199B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE1962E0023567 Withdrawn DE1260199B (en) 1962-09-22 1962-09-22 Electrode arrangement for polarographic oxygen analysis

Country Status (2)

Country Link
CH (1) CH465272A (en)
DE (2) DE1296836B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187162A (en) * 1978-06-26 1980-02-05 Rosemount Inc. Electrochemical cell
DE2938433C2 (en) * 1979-09-22 1982-08-26 Drägerwerk AG, 2400 Lübeck Measurement arrangement for blood gas measurement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CH465272A (en) 1968-11-15
DE1260199B (en) 1968-02-01

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee