GB1503908A - Carbon dioxide sensors - Google Patents
Carbon dioxide sensorsInfo
- Publication number
- GB1503908A GB1503908A GB4115874A GB4115874A GB1503908A GB 1503908 A GB1503908 A GB 1503908A GB 4115874 A GB4115874 A GB 4115874A GB 4115874 A GB4115874 A GB 4115874A GB 1503908 A GB1503908 A GB 1503908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- electrolyte
- sensor
- palladium
- hydrogen
- 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
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title abstract 6
- 229910002092 carbon dioxide Inorganic materials 0.000 title abstract 3
- 239000001569 carbon dioxide Substances 0.000 title abstract 3
- 239000003792 electrolyte Substances 0.000 abstract 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract 3
- 239000001257 hydrogen Substances 0.000 abstract 3
- 239000012528 membrane Substances 0.000 abstract 3
- -1 silver halide Chemical class 0.000 abstract 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052763 palladium Inorganic materials 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000004925 Acrylic resin Substances 0.000 abstract 1
- 229920000178 Acrylic resin Polymers 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 1
- 229910052741 iridium Inorganic materials 0.000 abstract 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229920005990 polystyrene resin Polymers 0.000 abstract 1
- 239000007784 solid electrolyte Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/4162—Systems investigating the composition of gases, by the influence exerted on ionic conductivity in a liquid
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)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
1503908 Electro-chemical CO 2 sensor SOCIAL SERVICES SECRETARY OF STATE FOR 22 Sept 1975 [20 Sept 1974] 41158/74 Heading G1N A carbon dioxide sensor comprises a sensing electrode 13 of palladium-hydrogen or iridiumhydrogen, a reference silver/silver halide electrode 15, an electrolyte 21 including bicarbonate and halide ions (the same as in the reference electrode) and a carbon dioxide permeable membrane 22 retaining the electrolyte in contact with the electrodes. The sensor also responds to oxygen. To allow compensation for this, a third electrode 12 of palladium or iridium (the same metal as in the sensing electrode) is placed in contact with the electrolyte, the voltage between this third electrode and the reference electrode being a measure of oxygen, which value can be subtracted from the sum value (CO 2 + O 2 ) obtained between sensor and reference electrodes. The preferred electrode metal is palladium and the preferred halide chloride. The electrolyte preferably comprises MNaCl + 10<SP>-2</SP>MNaHCO 3 but may be either aqueous or in solid form. The membrane may be polystyrene or acrylic resin and is preferably water permeable when the electrolyte is solid. As an alternative, a solid electrolyte may be incorporated in a water absorbent membrane. The sensor is preferably mounted on a catheter 17 and the measurement is made by high impedance voltmeter (# 10<SP>14</SP> ohms). The method of preparing the palladium-hydrogen and iridium-hydrogen electrodes by electrolysis is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4115874A GB1503908A (en) | 1975-09-22 | 1975-09-22 | Carbon dioxide sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4115874A GB1503908A (en) | 1975-09-22 | 1975-09-22 | Carbon dioxide sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1503908A true GB1503908A (en) | 1978-03-15 |
Family
ID=10418377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4115874A Expired GB1503908A (en) | 1975-09-22 | 1975-09-22 | Carbon dioxide sensors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1503908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982001306A1 (en) * | 1980-10-15 | 1982-04-29 | Potter William D | Coated articles and materials suitable for coating |
-
1975
- 1975-09-22 GB GB4115874A patent/GB1503908A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982001306A1 (en) * | 1980-10-15 | 1982-04-29 | Potter William D | Coated articles and materials suitable for coating |
| EP0050035A3 (en) * | 1980-10-15 | 1982-09-08 | Smith And Nephew Associated Companies P.L.C. | Coated articles and materials suitable for coatings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |