CN202939104U - Propionic acid gas static detection device - Google Patents
Propionic acid gas static detection device Download PDFInfo
- Publication number
- CN202939104U CN202939104U CN 201220620418 CN201220620418U CN202939104U CN 202939104 U CN202939104 U CN 202939104U CN 201220620418 CN201220620418 CN 201220620418 CN 201220620418 U CN201220620418 U CN 201220620418U CN 202939104 U CN202939104 U CN 202939104U
- Authority
- CN
- China
- Prior art keywords
- propionic acid
- acid gas
- bottle
- detection device
- quartz crystal
- 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 propionic acid gas static detection device, which comprises a gas inlet (1) and a gas outlet (2) provided with a valve for each, wherein nitrogen enters a closed detection bottle (5) through a drier (3), and the temperature of the closed detection bottle (5) is controlled by an ultra-thermostat (4); a bottle opening of the detection bottle (5) is sealed by a rubber plug (8), a stainless steel sprayer nozzle (10) with a built-in silicon rubber (9) is mounted on the rubber plug (8), and a microsyringe (11) is used for introducing a sample; and a piezoelectric quartz crystal sensor (7) is suspended in the middle of the detection bottle (5), and connected with a TTL (transistor-transistor logic) oscillator (14) and a frequency counter (16) to form a sensing detection return circuit. A coating material on the piezoelectric quartz crystal sensor (7) is benzo-18-crown-6/dioctyl phthalate, and absorbs a propionic acid gas under the hydrogen-bond interaction with high sensitivity and high selectivity. The device can conveniently and accurately detect the concentration of the propionic acid gas with a static equilibrium adsorption method.
Description
Technical field
The utility model relates to a kind of static detection device of propionic acid gas, and this device can detect the propionic acid gas concentration in industrial pollutants quickly and easily.
Background technology
Propionic acid extensively is present in nature, is the important containing oxygen derivative of hydrocarbon, and is inflammable, and tool corrosivity, strong and stimulating can cause human body and burn.One of 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 the diseases such as stomachache, pharyngitis, bronchitis and pulmonary edema; Its liquid can cause serious ocular infringement, and skin contact can cause and burn, and orally can occur feeling sick in a large number, the symptoms such as vomiting and stomachache; Can pollute water body, so environment and health are had serious harm.The propionic acid gas Cmax that allows in U.S. Occupational Safety and Health Administration (OSHA) regulation air is 10 ppm (30 mg/m
3), therefore the sensitivity monitoring tool of trace amounts of propionic acid gas in environment is of great significance.The assay method of propionic acid mainly contains acid base titration at present, the chromatography of ions, infra-red sepectrometry, high performance liquid chromatography, capillary electrophoresis, absorption spectrophotometry and enzyme reaction method etc., these conventionals method of analysis often due to complicated operation, length consuming time, the effects limit such as amount of samples is large, service condition is harsh its practical application, thereby the utility model proposes a kind of device simple, easy to operate propionic acid gas static detection device, can determine easily and accurately propionic acid gas concentration in industrial pollutants by the static balancing absorption method.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of propionic acid gas static detection device, and this appliance arrangement is simple and easy, easy to operate, can determine exactly the concentration of propionic acid gas in several minutes.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of propionic acid gas static detection device, this device comprises with the draft tube of valve and escape pipe, nitrogen enters in an airtight detection bottle by the ultra thermostat temperature control through exsiccator, discharged by escape pipe after being full of, close draft tube and escape pipe during detection; Detect a bottle bottleneck rubber stopper seal, the stainless steel jet pipe of a built-in silicon rubber is installed on rubber plug, passing silicon rubber with the syringe needle of microsyringe can be to detecting a bottle interior sample introduction; The small fan that is driven by a small-sized DC power supply passes rubber plug by wire, is suspended in to detect bottom bottle; Piezoelectric quartz crystal sensor passes rubber plug by wire and is suspended in and detects the bottle middle part, and is connected with the TTL oscillator, and the TTL oscillator is driven by direct supply, and is connected with frequency counter, consists of a complete sensing detection loop.The drying agent of placing in described exsiccator is anhydrous CaCl
2The material of described small fan is polyester plastics, and the output voltage that drives the small-sized DC power supply of small fan is 1 ~ 6V, and the output voltage that drives the direct supply of TTL oscillator is 2 ~ 12V.And, rubber plug with detect bottle, draft tube all closely is connected with rubber plug with escape pipe, and is good with this Integral sealing that guarantees to detect bottle.Described piezoelectric quartz crystal sensor is the piezoelectric quartz crystal that AT cuts two-sided quilt silver or quilt gold, the class coating material that is coated on piezoelectric quartz crystal sensor is benzo 18 hat 6/ dioctyl phthalates, its proportioning is 0.1 ~ 10:1, and it can, highly selective absorption propionic acid gas highly sensitive by hydrogen bond action.This device can determine the concentration of propionic acid gas easily and accurately by the static balancing absorption method.
Whole device is formed by above several assembling parts, and is readily removable except changing, and is easy to carry.The design, the AT that it is characterized in that static detection device cut two-sided quilt silver or have the benzo 18 of special adsorption function to be preced with the use of 6/ dioctyl phthalates by the application of golden piezoelectric quartz crystal sensor with to propionic acid gas.Find by lot of experimental data, the amount that is coated in class coating material benzo 18 hat 6/ dioctyl phthalates on piezoelectric quartz crystal sensor is 5 ~ 50 μ g.Its groundwork principle is that propionic acid gas can optionally be adsorbed on described responsive class coating material, and the trickle little mass change of generation can make the resonance frequency of sensor change, and calculates the concentration of the propionic acid gas in the gas sample of being surveyed with the frequency change value.
In the design of device, nitrogen enters sensing chamber by draft tube, and gas sample to be measured is injected by microsyringe.Nitrogen can make the propionic acid desorbing gas that is adsorbed on benzo 18 hat 6/ dioctyl phthalate class coating materials, makes sensor resonant frequency return to initial value.Whole process can be completed within a few minutes, just can be used for subsequently detection next time, so this device can effectively shorten detection time and simplify the operation course.
The beneficial effects of the utility model are, can measure accurately and rapidly the concentration of propionic acid gas, and apparatus structure are simple, and testing process is time saving and energy saving, and is very convenient.
Description of drawings
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Accompanying drawing 1 is the schematic diagram of propionic acid gas static detection device.
Wherein 1. draft tube, 2. escape pipe, 3. exsiccator, 4. ultra thermostat, 5. sensing chamber, 6. small fan, 7. piezoelectric quartz crystal sensor, 8. rubber plug, 9. silicon rubber, 10. stainless steel jet pipe, 11. microsyringes, 12. syringe needles, 13. small-sized DC power supply, 14. the TTL oscillator, 15. direct supplys, 16. frequency counters.
Embodiment
as shown in Figure 1, nitrogen is through entering after exsiccator 3 in an airtight detection bottle 5 by ultra thermostat 4 temperature controls, a small-sized DC power supply 13(output voltage is 3V) small fan 6 that drives is suspended in and detects bottle 5 bottoms, detecting bottle 5 bottlenecks seals with rubber plug 8, a stainless steel jet pipe 10 is installed on rubber plug 8, place silicon rubber 9 in jet pipe for microsyringe 11 sample introductions, AT cuts the silver-colored piezoelectric quartz crystal sensor 7 of two-sided quilt and is drawn by airtight detection bottle 5, with be 5V by direct supply 15(output voltage) the TTL oscillator 14 that drives is connected, TTL oscillator 14 is connected with frequency counter 16 again, consist of a complete sensing detection loop.The class coating material that is coated on piezoelectric quartz crystal sensor is 21 μ g benzo 18 hat 6/ dioctyl phthalates, and its proportioning is 3:1.Should be mentioned that, class coating material benzo 18 hat 6/ dioctyl phthalates on quartz crystal sensor are key substance of this sensing detection, and it can carry out selective adsorption with sensitivity to propionic acid gas by hydrogen bond action.Rubber plug all closely is connected with rubber plug with sensing chamber, turnover tracheae, and is good with this Integral sealing that guarantees sensing chamber.
The concrete operating process that detects is as follows:
1. opening power at first, make 14 starting of oscillations of TTL oscillator, and this moment, frequency counter 16 can demonstrate the frequency of vibration, then opened nitrogen draft tube 1 and escape pipe 2, shows until frequency and close draft tube 1 and escape pipe 2 after stable, records original frequency value F
1
2. pass through microsyringe 11 to detecting bottle 5 interior quick injection propionic acid gas samples, record lower frequency value F after frequency stabilization
2
3. the frequency response values of each gas sample (△ F) can be drawn by following formula: △ F=F
1-F
2, △ F is updated in corresponding working curve equation, can calculate the concentration value of propionic acid gas in the sample of giving vent to anger;
4. detect and open nitrogen draft tube 1 and escape pipe 2 after complete, make frequency counter 16 display frequencies return to original frequency value F
1, then close all gas circuits, use in order to detecting next time.
The static analysis that the utility model can be applied to propionic acid gas in ambient atmosphere detects.The piezoelectric quartz crystal sensor that uses has sensitive response characteristic, can in time reflect the concentration of detected propionic acid gas.As long as propionic acid gas sample is injected airtight detection bottle, just can reach fast, accurately detect the purpose of propionic acid gas.
Claims (7)
1. propionic acid gas static detection device, this device comprises draft tube (1) and the escape pipe (2) with valve, nitrogen enters in an airtight detection bottle (5) by ultra thermostat (4) temperature control through exsiccator (3), discharged by escape pipe (2) after being full of, close draft tube (1) and escape pipe (2) during detection; Detect bottle (5) bottleneck with rubber plug (8) sealing, the upper stainless steel jet pipe (10) that a built-in silicon rubber (9) is installed of rubber plug (8), passing silicon rubber (9) with the syringe needle (12) of microsyringe (11) can be to detecting bottle (a 5) interior sample introduction; The small fan (6) that is driven by a small-sized DC power supply (13) passes rubber plug (8) by wire, is suspended in to detect bottom bottle (5); Piezoelectric quartz crystal sensor (7) passes rubber plug (8) by wire and is suspended in and detects bottle (5) middle part, and be connected with TTL oscillator (14), TTL oscillator (14) is driven by direct supply (15), and be connected with frequency counter (16), consist of a complete sensing detection loop.
2. propionic acid gas static detection device according to claim 1 is characterized in that: the drying agent of placing in exsiccator (3) is anhydrous CaCl
2
3. propionic acid gas static detection device according to claim 1, it is characterized in that: the material of small fan (6) is polyester plastics, and the output voltage that drives the small-sized DC power supply (13) of small fan (6) is 1 ~ 6V.
4. propionic acid gas static detection device according to claim 1 is characterized in that: the output voltage that drives the direct supply (15) of TTL oscillator (14) is 2 ~ 12V.
5. propionic acid gas static detection device according to claim 1, is characterized in that: described piezoelectric quartz crystal sensor (7) piezoelectric quartz crystal that two-sided quilt is silver-colored or quilt is golden for AT cuts.
6. propionic acid gas static detection device according to claim 5 is characterized in that: the class coating material that is coated on piezoelectric quartz crystal sensor (7) is benzo 18 hat 6/ dioctyl phthalates.
7. propionic acid gas static detection device according to claim 6 is characterized in that: the amount that is coated in class coating material benzo 18 hat 6/ dioctyl phthalates on piezoelectric quartz crystal sensor (7) is 5 ~ 50 μ g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220620418 CN202939104U (en) | 2012-11-22 | 2012-11-22 | Propionic acid gas static detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220620418 CN202939104U (en) | 2012-11-22 | 2012-11-22 | Propionic acid gas static detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939104U true CN202939104U (en) | 2013-05-15 |
Family
ID=48323335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220620418 Expired - Fee Related CN202939104U (en) | 2012-11-22 | 2012-11-22 | Propionic acid gas static detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939104U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535449A (en) * | 2015-01-21 | 2015-04-22 | 山东师范大学 | Non-contact electrode piezoelectric transducer device for monitoring strongly-corrosive gas and method |
| CN113075290A (en) * | 2021-03-01 | 2021-07-06 | 南京诺奥新材料有限公司 | Propionic acid concentration measuring device and method |
-
2012
- 2012-11-22 CN CN 201220620418 patent/CN202939104U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535449A (en) * | 2015-01-21 | 2015-04-22 | 山东师范大学 | Non-contact electrode piezoelectric transducer device for monitoring strongly-corrosive gas and method |
| CN104535449B (en) * | 2015-01-21 | 2017-02-22 | 山东师范大学 | Non-contact electrode piezoelectric transducer device for monitoring strongly-corrosive gas and method |
| CN113075290A (en) * | 2021-03-01 | 2021-07-06 | 南京诺奥新材料有限公司 | Propionic acid concentration measuring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2659141C2 (en) | Gas analyzer | |
| CN102478475B (en) | Quartz crystal microbalance analyzing device with self-cleaning internally circulating gas circuit | |
| CN105588916B (en) | One kind flowing and static dual-purpose gas sensor test system | |
| WO2019036889A1 (en) | Stm32-based chemical plant environment detection system and detection method | |
| CN202939104U (en) | Propionic acid gas static detection device | |
| CN203275231U (en) | Device for measuring dynamic adsorption coefficient of material in vacuum | |
| CN105866190A (en) | Electronic nose device for food detection and detection method | |
| CN105136707A (en) | Detection device of volatile organic compound content and catalytic oxidation purification efficiency | |
| CN104502555A (en) | Portable intelligent fruit and vegetable respiration intensity measuring device and method | |
| CN202903634U (en) | QCM (Quartz Crystal Microbalance) gas-phase static detecting device | |
| CN102323303B (en) | Experimental apparatus and method for testing gas-sensitive temperature characteristic of carbon nanotube sensor | |
| CN203069541U (en) | Methanol gas static detection device | |
| CN201926602U (en) | Simple propionic acid gas detection device | |
| CN202994607U (en) | Acetic acid gas static detection device | |
| CN202903734U (en) | Formic acid gas static detecting sensor | |
| CN105445133A (en) | Quartz crystal microbalance sensor for detecting trimethylamine gas as well as preparation method and application thereof | |
| CN202661347U (en) | Simple ammonia detection device | |
| CN203299076U (en) | Static detection sensor for normal butyl alcohol gas | |
| CN203148804U (en) | Static detecting device for ethanol gas | |
| CN206945597U (en) | A kind of electrochemical process carbonomonoxide concentration detection means | |
| CN201945530U (en) | Device for testing carbon dioxide gas in transformer oil | |
| CN203203961U (en) | Static detecting sensor of isopropyl alcohol gas | |
| CN201909746U (en) | Simple acetic acid gas detector | |
| CN204203163U (en) | A kind of system of monitoring hydrate and generating | |
| CN203178155U (en) | N-propyl alcohol gas dynamic detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20141122 |
|
| EXPY | Termination of patent right or utility model |