GB918949A - Improvements in or relating to gas detectors - Google Patents
Improvements in or relating to gas detectorsInfo
- Publication number
- GB918949A GB918949A GB139360A GB139360A GB918949A GB 918949 A GB918949 A GB 918949A GB 139360 A GB139360 A GB 139360A GB 139360 A GB139360 A GB 139360A GB 918949 A GB918949 A GB 918949A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbon dioxide
- manganous
- dispersed
- granules
- atmosphere
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
A gas detector comprises an evacuated transparent envelope, with a breakable end, containing a chemical, capable of a colour change when in contact with a specific gas, preferably dispersed on the surface of granules or pellets of an inert material. Oxygen is detected by the use of manganous oxide dispersed on silica gel (chromatographic grade, 50-100 mesh previously dried at 430 DEG C.). Manganous carbonate is first prepared by mixing solutions of manganous chloride and sodium bicarbonate, filtering, washing successively with water 96%, alcohol, pentane and drying. The resulting manganese carbonate is mixed with 8 parts by weight of silica gel in an atmosphere of carbon dioxide. The granules, still in an atmosphere of carbon dioxide, are transferred to glass tubes. The tubes are heated in vacuo at 430 DEG C. for 45 min., to give manganous oxides, and sealed. Carbon dioxide estimation is effected by using a similar evacuated tube containing rosaniline hydrochloride (dispersed in acid washed sand) which has been decolourized with hydrazine hydrate. This reagent rapidly changes from white to red when contacted with carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB139360A GB918949A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to gas detectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB139360A GB918949A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to gas detectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918949A true GB918949A (en) | 1963-02-20 |
Family
ID=9721214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB139360A Expired GB918949A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to gas detectors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB918949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218515A (en) * | 1988-04-26 | 1989-11-15 | Quentin Paul Ainsworth | Carbon-dioxide detection |
| US5415809A (en) * | 1992-07-15 | 1995-05-16 | Aquarium Pharmaceuticals, Inc. | Method for determination of dissolved oxygen in water |
-
1960
- 1960-01-14 GB GB139360A patent/GB918949A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218515A (en) * | 1988-04-26 | 1989-11-15 | Quentin Paul Ainsworth | Carbon-dioxide detection |
| US5415809A (en) * | 1992-07-15 | 1995-05-16 | Aquarium Pharmaceuticals, Inc. | Method for determination of dissolved oxygen in water |
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