CN201909746U - Simple acetic acid gas detector - Google Patents
Simple acetic acid gas detector Download PDFInfo
- Publication number
- CN201909746U CN201909746U CN2011200147489U CN201120014748U CN201909746U CN 201909746 U CN201909746 U CN 201909746U CN 2011200147489 U CN2011200147489 U CN 2011200147489U CN 201120014748 U CN201120014748 U CN 201120014748U CN 201909746 U CN201909746 U CN 201909746U
- Authority
- CN
- China
- Prior art keywords
- quartz crystal
- crystal sensor
- acetate
- gas
- easy
- 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 - Fee Related
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a simple acetic acid gas detector. Two gas inlet tubes (1, 2) are combined into one route, pass through a drying pipe (5), and then get to the bottom of a detection bottle (10), the detection bottle (10) is sealed by a rubber plug (8), a quartz crystal sensor (6) and a gas outlet tube (9) are inserted in the rubber plug (8), wherein the sensitive coating material coated on the quartz crystal sensor (6) is dibenzo-30-crown-10, which can sensitively and selectively adsorb acetic acid gas molecules by means of the action of supermolecules, the quartz crystal sensor (6) is connected with an oscillating circuit (11), and the oscillating circuit (11) is driven by a direct-current power supply (12), and is connected with a frequency counter (13) to form a whole sensing detection loop. The detector is easy to fabricate, can accurately and quickly detect the concentration of the acetic acid gas in the environmental atmosphere, and can be used for on-line monitoring.
Description
Technical field
The utility model relates to a kind of easy acetate (CH
3COOH) gas sensing pick-up unit, this device can detect the concentration of acetate gas in the ambient atmosphere accurately and rapidly, and can be used for on-line monitoring.
Background technology
Acetate is one of the main poisonous air pollutants in resident living area and commercial production district, its high concentration steam has the strong impulse effect to eyes, skin and the mucous membrane of humans and animals, respiratory tract and gastrointestinal system etc. there is serious corrosive attack, can causes diseases such as chronic pharyngitis, bronchitis, pneumonia and shock.The acetate gas Cmax that is allowed in U.S. Occupational Safety and Health Administration (OSHA) the regulation air is 10ppm (25mg/m
3), therefore the sensitivity monitoring to acetate in the ambient atmosphere has crucial meaning.The assay method of acetate mainly contains acid base titration, the chromatography of ions, high performance liquid chromatography, capillary electrophoresis, absorption spectrophotometry and fluorometry etc. at present, these methods are because operation link is many, waste time and energy, be unsuitable for the concentration of on-line monitoring acetate gas, therefore a kind of low cost, easy and simple to handle need be found, and the apparatus of accurate fast measuring acetate gas concentration can be reached.
The utility model content
Technical problem to be solved in the utility model provides a kind of easy acetate gas-detecting device, this device be easy to the preparation, easy to operate, can use repeatedly, the concentration of acetate gas can be in several minutes, detected exactly, and the determination and analysis of ambient atmosphere acetate can be used for.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of device that can detect acetate gas, this device comprises two air inlet pipelines and an outlet pipe, described two draft tube are merged into leads up to drying tube and enters and detect bottle, detect bottle and upward use rubber stopper seal, be inserted with a quartz crystal sensor and described escape pipe in the described rubber plug, the class coating material that is coated on the sensor is dibenzo 30 hats 10, described quartz crystal sensor is connected with transistor-transistor-logic (TTL) oscillatory circuit, described oscillatory circuit is driven by direct supply, and be connected with frequency counter, constitute a complete sensing detection loop.It is characterized in that device each several part design, quartz crystal sensor application and acetate gas is had the use that is coated with membrane substance dibenzo 30 hats 10 of special adsorption function, find that by a large amount of experimental datas its amount that is coated on the quartz crystal sensor is the detection best results between 5～35 micrograms time.Whole device is formed by above several component-assembled, and readily removable removing changed, and is easy to carry.Its principle of work is that acetate gas optionally is adsorbed on and is coated with on membrane substance dibenzo 30 hat 10, and the small mass change of generation can make the resonance frequency of sensor change, and calculates the acetic acid concentration in the gas sample surveyed with the frequency change value.This gas sensing pick-up unit has high sensitivity and wide sensing range to acetate, and selectivity, reappearance and reversibility are good, can be applicable to the monitoring of acetate in the ambient atmosphere.
On Design of device, but two air inlet pipeline independent switches of nitrogen and acetate gas sample, and nitrogen and acetate gas sample can alternately enter and detect in the bottle.Nitrogen can make and be adsorbed on the described acetate desorbing gas that is coated with on the membrane substance, makes sensor resonant frequency return to initial value.Whole process just can be finished with interior at 5 minutes, just can continue on for detection next time subsequently, so this device can reduce detection time effectively and simplify the operation course.
The beneficial effects of the utility model are, can measure the concentration of acetate gas accurately, rapidly, continuously, and apparatus structure are simple, is easy to portable and intellectualized reconstruction, thereby can be used for the analyzing and testing, on-line monitoring of acetate in the ambient atmosphere etc.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the synoptic diagram of simple and easy acetate gas-detecting device.
Fig. 2 is the graph of relation of frequency change value (representing with Hz) Yu the acetate gas corresponding concentration (mg/L) of sensor.
Fig. 3 is the molecular structure that the acetate gas molecule is had dibenzo 30 hats 10 of specific selective adsorption function.
1. gas sample draft tube among Fig. 1,2. nitrogen draft tube, 3. gas sample draft tube switch, 4. nitrogen draft tube switch, 5 drying tubes (the anhydrous CaCl of interior filling
2), 6. quartz crystal sensor, 7. escape pipe switch, 8. rubber plug, 9. escape pipe 10. detects bottle, 11. oscillatory circuits, 12. direct supplys, 13. frequency counters.
Fig. 2 is coated on dibenzo 30 hats 10 of 12.5 micrograms on the quartz crystal sensor, by adding the acetate standard model, can obtain the relation curve of acetate gas concentration and response frequency changing value, and the equation of this curve fitting is:
y＝152.3+41.47x
Y represents the concentration (mg/L) of acetate gas in the formula, and x represents frequency change value Δ F (Hz).The above-mentioned relation curve is drawn when 24 ℃ of room temperatures.
Embodiment
As shown in fig. 1, two draft tube 1,2 are merged into one the tunnel through entering detection bottle 10 bottoms behind the drying tube 5, and detecting bottle 10 can be glass, also can be plastic, big or small desirable 0.5L.Detect on the bottle 10 with rubber plug 8 sealings, be inserted with a quartz crystal sensor 6 and escape pipe 9 in the rubber plug 8, quartz crystal sensor 6 is connected with oscillatory circuit 11, oscillatory circuit 11 is driven by direct supply 12 and is connected with frequency counter 13, so just is assembled into a complete sensing detection loop easily.Should be mentioned that quartz crystal sensor 6 the above coating material dibenzo 30 hat 10 are key substance of this sensing detection, it can carry out selective adsorption with sensitivity to acetate gas by the supermolecule effect.Rubber plug 8 with detect bottle 10, escape pipe 9 all is close-connected with rubber plug 8, and is good with this overall tightness that guarantees to detect bottle 10.
The concrete operating process that detects is as follows:
1. opening power at first, make oscillatory circuit 11 starting of oscillations, this moment, frequency counter 13 can demonstrate the frequency of vibration, opened nitrogen draft tube switch 4 and escape pipe switch 7 then, treat that its frequency shows and close nitrogen draft tube switch 4 and escape pipe switch 7 when stablizing, note original frequency value F
1
2. open gas sample draft tube switch 3 and escape pipe switch 7 then, when treating that frequency counter 13 demonstrations are stablized, close hold one's breath sample draft tube switch 3 and escape pipe switch 7, note frequency value F
2
3. (Δ F Hz) can be drawn by following formula the frequency response values of each gas sample: Δ F=F
1-F
2, Δ F is updated in the working curve equation of Fig. 2, can calculate the concentration value of acetate gas in the gas sample;
4. after detection finishes, open escape pipe switch 7 and nitrogen draft tube switch 4, make frequency counter 13 display frequencies return to original frequency value F
1, close all gas circuits then, use in order to detecting next time.
The utility model can be applied to the on-line analysis monitoring of acetate gas in the ambient atmosphere.Employed quartz crystal sensor has the real-time response performance, can in time reflect the concentration of acetate in the detected gas sample.As long as gas sample pipeline is connected to the monitoring point, just can reach the purpose of remote monitor.
Claims (4)
1. simple and easy acetate gas-detecting device, it is characterized in that: this device is merged into one the tunnel through entering detection bottle (10) bottom behind the drying tube (5) by two draft tube (1,2), detecting bottle (10) goes up with rubber plug (8) sealing, be inserted with a quartz crystal sensor (6) and escape pipe (9) in the rubber plug (8), quartz crystal sensor (6) is connected with oscillatory circuit (11), oscillatory circuit (11) is driven by direct supply (12) and is connected with frequency counter (13), constitutes a complete sensing detection loop.
2. simple and easy acetate gas-detecting device according to claim 1 is characterized in that: two air inlet pipelines (1,2) can independent gauge tap, and nitrogen and acetate gas sample can alternately enter and detect in the bottle (10).
3. simple and easy acetate gas-detecting device according to claim 1 is characterized in that: the responsive class coating material that is coated on the quartz crystal sensor (6) is dibenzo 30 hats 10.
4. simple and easy acetate gas-detecting device according to claim 3 is characterized in that: the amount that is coated on responsive class coating material dibenzo 30 hats 10 on the quartz crystal sensor (6) is 5～35 micrograms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200147489U CN201909746U (en) | 2011-01-18 | 2011-01-18 | Simple acetic acid gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200147489U CN201909746U (en) | 2011-01-18 | 2011-01-18 | Simple acetic acid gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201909746U true CN201909746U (en) | 2011-07-27 |
Family
ID=44301947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200147489U Expired - Fee Related CN201909746U (en) | 2011-01-18 | 2011-01-18 | Simple acetic acid gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201909746U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727526A (en) * | 2017-10-09 | 2018-02-23 | 昆明理工大学 | A kind of gravimetric detemination surface reactive material solubilising absorbs the measure device and its assay method of volatile organic matter |
-
2011
- 2011-01-18 CN CN2011200147489U patent/CN201909746U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727526A (en) * | 2017-10-09 | 2018-02-23 | 昆明理工大学 | A kind of gravimetric detemination surface reactive material solubilising absorbs the measure device and its assay method of volatile organic matter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101644700B (en) | Method and device for measuring radon exhalation rate on medium surface | |
| CN102478475B (en) | Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit | |
| CN101476997A (en) | Sulfur hexafluoride gas sample collection apparatus | |
| CN205562522U (en) | Soil normal position gas analysis device | |
| CN103558212B (en) | Nitrogen dioxide testing device and detection method | |
| CN104614753B (en) | A kind of method and apparatus of continuous measurement radon eduction rate on medium furface | |
| CN201926602U (en) | Simple propionic acid gas detection device | |
| CN201348579Y (en) | Sulfur hexafluoride sample collection device | |
| CN108152370A (en) | A kind of SF6And N2Mixing gas component ratio device for fast detecting and method | |
| CN201909746U (en) | Simple acetic acid gas detector | |
| CN201945530U (en) | Device for testing carbon dioxide gas in transformer oil | |
| CN105716932A (en) | Dilute gas path control method and device used for high-concentration gas measurement | |
| CN202661347U (en) | Simple ammonia detection device | |
| CN205317611U (en) | Flue gas water capacity detecting system | |
| CN201983997U (en) | Easy methanoic acid detection device | |
| CN202649095U (en) | Methane measurement intelligent sensor convenient for sampling | |
| CN203572774U (en) | Nitrogen dioxide detection device | |
| CN202939155U (en) | Simple isopropanol gas detection device | |
| CN202903632U (en) | Simple acetone gas detection device | |
| CN202903633U (en) | Simple acetone gas detection device | |
| CN203178155U (en) | N-propyl alcohol gas dynamic detection device | |
| CN206248598U (en) | A kind of equipment of smoke dust sampling | |
| CN202939104U (en) | Propionic acid gas static detection device | |
| CN207408299U (en) | For detecting the portable fast detector of fumigant | |
| CN104407107A (en) | Intelligent sewer detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20120118 |