GB1233915A - - Google Patents
Info
- Publication number
- GB1233915A GB1233915A GB1233915DA GB1233915A GB 1233915 A GB1233915 A GB 1233915A GB 1233915D A GB1233915D A GB 1233915DA GB 1233915 A GB1233915 A GB 1233915A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- subjected
- ions
- chamber
- charged
- 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
- G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Toxicology (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
1,233,915. Analyzing gases. MINISTRY OF DEFENCE. July 30, 1969, [July 2, 1968], No.31486/68. Heading G1N. In apparatus for measuring the concentration of a gas in a sample of air, the air sample is first subjected to a physical or chemical process specific to the particular gas to produce particles, is then ionized, e.g. by a radio-active source, and then passed, via a restricted orifice, into a charging chamber, the orifice and walls of the chamber having different potentials so that all the ions of one sign are swept into the chamber to set up a unipolar plasma on which the particles are charged by collisions, the quantity of charge of the particles being measured, e.g. by an electro-meter to indicate the concentration of gas. To separate the charged particles from the unipolar ions, they are subjected to an electrostatic barrier, such that only the charged particles are allowed through. The charged particles may be collected by a wire wool filter connected to earth via a resistor. If the air contains sulphur dioxide, it is subjected to U. V. light so that sulphur particles are formed, and if the air contains ammonia or a primary amine, it is subjected to hydrochloric acid to produce particles. The apparatus for charging the particles by setting of a unipolar plasma of ions is as described and claimed in Specification 1, 105, 604.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3148668 | 1968-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1233915A true GB1233915A (en) | 1971-06-03 |
Family
ID=10323808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1233915D Expired GB1233915A (en) | 1968-07-02 | 1968-07-02 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1233915A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2472752A1 (en) * | 1975-12-15 | 1981-07-03 | United Kingdom Government | APPARATUS FOR DETECTING POLAR VAPORS |
| US4574004A (en) * | 1980-10-28 | 1986-03-04 | Schmidt Ott Andreas | Method for charging particles suspended in gases |
| CN109991137A (en) * | 2019-04-02 | 2019-07-09 | 霸州市地海云天环保科技有限公司 | Small ion collection type monitoring device of powder-like waste based on αsource |
-
1968
- 1968-07-02 GB GB1233915D patent/GB1233915A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2472752A1 (en) * | 1975-12-15 | 1981-07-03 | United Kingdom Government | APPARATUS FOR DETECTING POLAR VAPORS |
| US4368388A (en) * | 1975-12-15 | 1983-01-11 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Detection of polar vapors |
| US4574004A (en) * | 1980-10-28 | 1986-03-04 | Schmidt Ott Andreas | Method for charging particles suspended in gases |
| CN109991137A (en) * | 2019-04-02 | 2019-07-09 | 霸州市地海云天环保科技有限公司 | Small ion collection type monitoring device of powder-like waste based on αsource |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |