GB1075054A - Colorimetric gas dosimeter - Google Patents
Colorimetric gas dosimeterInfo
- Publication number
- GB1075054A GB1075054A GB3571364A GB3571364A GB1075054A GB 1075054 A GB1075054 A GB 1075054A GB 3571364 A GB3571364 A GB 3571364A GB 3571364 A GB3571364 A GB 3571364A GB 1075054 A GB1075054 A GB 1075054A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- indicator
- tube
- bed
- gas
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 239000004744 fabric Substances 0.000 abstract 2
- JNRLEMMIVRBKJE-UHFFFAOYSA-N 4,4'-Methylenebis(N,N-dimethylaniline) Chemical compound C1=CC(N(C)C)=CC=C1CC1=CC=C(N(C)C)C=C1 JNRLEMMIVRBKJE-UHFFFAOYSA-N 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical class C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000003283 colorimetric indicator Substances 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 238000004868 gas analysis Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000011491 glass wool Substances 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 239000000741 silica gel Substances 0.000 abstract 1
- 229910002027 silica gel Inorganic materials 0.000 abstract 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 abstract 1
- 229940098221 silver cyanide Drugs 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- PRZSXZWFJHEZBJ-UHFFFAOYSA-N thymol blue Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C PRZSXZWFJHEZBJ-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
1,075,054. Gas analysis. MINE SAFETY APPLIANCES CO. Sept.1, 1964, No.35713/64. Heading G1B. A gas dosimeter comprises a sealed transparent tube 2 having a frangible end 5, and a bed of colorimetric indicator reactive with a gas to be detected to give a colour change within the tube and spaced from the end 5 by a plug 10 of porous material. The purpose of the plug 10 is to prevent extraneous air currents from reaching the surface 12 of the indicator bed. Gaseous diffusion into the bed causes a colour change in the indicator the length of the colour change zone being dependent on the concentration of the gas to be detected. In draught-free conditions the plug 10 may be replaced by length of narrowbore tube, but a small plug will also be required to keep the indicator bed in place. The indicator may be activated alumina impregnated with silver cyanide for H 2 S, a granular solid carrying the reaction product of tetramethyldiaminodiphenylmethane and an oxidizing agent for SO 2 , silica gel carrying a benzidine derivative for NO 2 Cl 2 or Br 2 , or activated alumina with thymol blue for CO 2 , and the plug 10 may be a wad of fibre or cloth such as glass wool or cloth or organdy or of sintered glass. A removable cap or stopper may be provided in place of the frangible end 5, and the tube 2 may be marked with a suitable scale or the tube may be mounted on a card incorporating a scale.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM0062560 | 1964-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1075054A true GB1075054A (en) | 1967-07-12 |
Family
ID=7310489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3571364A Expired GB1075054A (en) | 1964-09-25 | 1964-09-01 | Colorimetric gas dosimeter |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1498909B2 (en) |
| GB (1) | GB1075054A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3137756A1 (en) * | 1980-09-25 | 1982-07-01 | Mine Safety Appliances Co., 15235 Pittsburgh, Pa. | COLORIMETRIC GAS DOSAGE METER |
| US4528160A (en) * | 1983-06-14 | 1985-07-09 | Dragerwerk Aktiengesellschaft | Gas dosimeter construction |
| US4680165A (en) * | 1982-03-19 | 1987-07-14 | Vo Dinh Tuan | Dosimeter for monitoring vapors and aerosols of organic compounds |
| US4790857A (en) * | 1986-11-20 | 1988-12-13 | Miksch Robert R | Gaseous contaminant dosimeter with diffusive material for regulating mass uptake |
| US4946649A (en) * | 1985-01-31 | 1990-08-07 | Dragerwerk Aktiengesellschaft | Colorimetric gas diffusion testing tube |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883262A (en) * | 1981-11-13 | 1983-05-19 | Midori Anzen Kk | Harmful gas integrated concentration checker |
| DE3534934A1 (en) * | 1985-10-01 | 1987-04-02 | Draegerwerk Ag | COLORIMETRIC GAS DOSAGE METER |
| DE3709296C1 (en) * | 1987-03-20 | 1988-09-22 | Draegerwerk Ag | Colorimetric gas measuring device |
| WO2008006153A1 (en) * | 2006-07-11 | 2008-01-17 | Paul Nigel Brockwell | Medical indicator method and device |
-
1964
- 1964-09-01 GB GB3571364A patent/GB1075054A/en not_active Expired
- 1964-09-25 DE DE19641498909 patent/DE1498909B2/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3137756A1 (en) * | 1980-09-25 | 1982-07-01 | Mine Safety Appliances Co., 15235 Pittsburgh, Pa. | COLORIMETRIC GAS DOSAGE METER |
| US4680165A (en) * | 1982-03-19 | 1987-07-14 | Vo Dinh Tuan | Dosimeter for monitoring vapors and aerosols of organic compounds |
| US4528160A (en) * | 1983-06-14 | 1985-07-09 | Dragerwerk Aktiengesellschaft | Gas dosimeter construction |
| US4946649A (en) * | 1985-01-31 | 1990-08-07 | Dragerwerk Aktiengesellschaft | Colorimetric gas diffusion testing tube |
| US4790857A (en) * | 1986-11-20 | 1988-12-13 | Miksch Robert R | Gaseous contaminant dosimeter with diffusive material for regulating mass uptake |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1498909A1 (en) | 1969-04-17 |
| DE1498909B2 (en) | 1970-03-26 |
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