FR2388273A2 - Composite graphite-gold-PTFE electrode for emission gases detection - specifically sulphur di:oxide, nitrous or nitric oxide - Google Patents

Composite graphite-gold-PTFE electrode for emission gases detection - specifically sulphur di:oxide, nitrous or nitric oxide

Info

Publication number
FR2388273A2
FR2388273A2 FR7811596A FR7811596A FR2388273A2 FR 2388273 A2 FR2388273 A2 FR 2388273A2 FR 7811596 A FR7811596 A FR 7811596A FR 7811596 A FR7811596 A FR 7811596A FR 2388273 A2 FR2388273 A2 FR 2388273A2
Authority
FR
France
Prior art keywords
gold
electrode
oxide
electrodes
nitrous
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Withdrawn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
FR7811596A
Other languages
French (fr)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2388273A2 publication Critical patent/FR2388273A2/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Withdrawn legal-status Critical Current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
    • G01N27/4045—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 for gases other than oxygen
    • 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
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Molecular Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The parent patent described specific electrodes for electrochemical estimation of the concns. of SO2, NO2 or NO individually as components of a gas stream entering and leaving a cell. SO2 is detected by use of an active carbon electrode, NO2 or NO by gold electrodes operating at different electrode potentials. This addition describes a composite electrode comprising a thin carbon layer which is permeable to gas, hydrophobic and electrically conductive and which also carries a thin coating of gold. The composite electrodes may be used for measurement of SO2, NO2 or NO in the range 5-0.01ppm, both reducing mfg. variety and cell complexity and increasing the sensitivity of a typical 3-electrode cell. Requires use of less gold than the former unsupported gold electrodes.
FR7811596A 1977-04-19 1978-04-19 Composite graphite-gold-PTFE electrode for emission gases detection - specifically sulphur di:oxide, nitrous or nitric oxide Withdrawn FR2388273A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772717180 DE2717180A1 (en) 1977-04-19 1977-04-19 DEVICE FOR SIMULTANEOUS QUANTITATIVE CONCENTRATION MONITORING IN THE IMMISSION AND EMISSIONS OF GASEOUS POLLUTANTS

Publications (1)

Publication Number Publication Date
FR2388273A2 true FR2388273A2 (en) 1978-11-17

Family

ID=6006614

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7811596A Withdrawn FR2388273A2 (en) 1977-04-19 1978-04-19 Composite graphite-gold-PTFE electrode for emission gases detection - specifically sulphur di:oxide, nitrous or nitric oxide

Country Status (4)

Country Link
BE (1) BE866132R (en)
DE (1) DE2717180A1 (en)
FR (1) FR2388273A2 (en)
NL (1) NL7803976A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017996A1 (en) * 1996-10-21 1998-04-30 Mine Safety Appliances Company Electrochemical gas sensor and method for the detection of nitrogen dioxide
WO1999001758A1 (en) * 1997-07-02 1999-01-14 Mine Safety Appliances Company Electrochemical sensor for the detection of hydrogen chloride and method of use thereof
WO2000037931A1 (en) * 1998-12-21 2000-06-29 Envitec-Wismar Gmbh Electrochemical gas sensor exhibiting a high selectivity for nitrogen monoxide
WO2003059507A1 (en) * 2002-01-16 2003-07-24 Mintek Gold catalysts and methods for their preparation

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998017996A1 (en) * 1996-10-21 1998-04-30 Mine Safety Appliances Company Electrochemical gas sensor and method for the detection of nitrogen dioxide
WO1999001758A1 (en) * 1997-07-02 1999-01-14 Mine Safety Appliances Company Electrochemical sensor for the detection of hydrogen chloride and method of use thereof
US5908546A (en) * 1997-07-02 1999-06-01 Mine Safety Appliances Company Detection of hydrogen chloride
GB2341935A (en) * 1997-07-02 2000-03-29 Mine Safety Appliances Co Electrochemical sensor for the detection of hydrogen chloride and method of use thereof
GB2341935B (en) * 1997-07-02 2001-12-12 Mine Safety Appliances Co Electrochemical sensor for the detection of hydrogen chloride and method of use thereof
WO2000037931A1 (en) * 1998-12-21 2000-06-29 Envitec-Wismar Gmbh Electrochemical gas sensor exhibiting a high selectivity for nitrogen monoxide
WO2003059507A1 (en) * 2002-01-16 2003-07-24 Mintek Gold catalysts and methods for their preparation

Also Published As

Publication number Publication date
BE866132R (en) 1978-08-14
NL7803976A (en) 1978-10-23
DE2717180A1 (en) 1979-03-01

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Legal Events

Date Code Title Description
RE Withdrawal of published application