CN105372357A - Ionization, adsorption and enrichment device - Google Patents
Ionization, adsorption and enrichment device Download PDFInfo
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- CN105372357A CN105372357A CN201510948217.XA CN201510948217A CN105372357A CN 105372357 A CN105372357 A CN 105372357A CN 201510948217 A CN201510948217 A CN 201510948217A CN 105372357 A CN105372357 A CN 105372357A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/08—Preparation using an enricher
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Abstract
The invention relates to a detection device of volatile organic matter, in particular to an ionization, adsorption and enrichment device which comprises a sucking pump, an ionization lamp, an ionization and adsorption detection pool, an enrichment membrane and a voltage generator. The ionization and adsorption detection pool comprises an ionization lamp protection cover and a fixing seat arranged at the bottom of the protection cover, the ionization lamp is arranged in the ionization lamp protection cover, a light intensified voltage positive lead seat and a light intensified voltage negative lead seat of the ionization lamp are connected with the voltage generator, the ionization and adsorption detection pool is connected with the sucking pump and an air inlet pipe, the sucking pump and the air inlet pipe are both communicated with the interior space of the ionization lamp protection cover, the ionization and adsorption detection pool is further internally provided with a positive electrode and a negative electrode, and an enrichment film is located at the negative electrode. The ionization, adsorption and enrichment device can be widely applied to such fields as environmental detection, atmosphere detection, water detection, special environment detection and analysis, biology, medical science and surface science, can rapidly adsorb and enrich a trace of volatile organic matter and is accurate in analysis.
Description
Technical field
The present invention relates to the pick-up unit of volatile organic matter, be specially a kind of ionization adsorption and enrichment device.
Background technology
Modernization industrial expansion is very fast, and widely, while bringing convenience to the mankind, its spinoff brings the mankind very large harm, and the environmental pollution brought as volatile organic matter (VOCs) becomes very serious in application.VOCs penetrates into the every aspect of human lives, and from the leakage of the discharge, shipping storage etc. in chemical plant, waste incineration brings bioxin etc., also has the pollution discharged in material in house ornamentation.Although volatile organic contaminant is trace, its concentration is in ppm magnitude or be less than ppm magnitude or low to ppb magnitude, but it is very huge on the impact of the mankind, it is believed that more than 60% of human blood disease is that this compounds causes, pollutant more serious in air such as bioxin etc. causes one of the mankind important arch-criminal that cancer is occurred frequently in recent years.
It is the target that AC and analytical instrument worker make great efforts that analysis for trace VOCs detects always, because be limited by existing instrument detection limit, existing method adopts to carry out enrichment to trace analysis object, to improve its relative concentration, then parse by physics or chemical method the analysis carrying out existing instrument and detect.Existing adsorption and enrichment method adopts large volume air-flow to pass through adsorbent, or sorbing material is placed in air to be measured for a long time, a shortcoming of these methods almost has suction-operated to all organism, adsorbent utilization ratio is not high, and owing to being subject to the constraint of breakthrough volume in air flow adsorption and enrichment, adsorbent is sufficiently many, this also can cause some adverse effects to operation later, such as volume is large, and the short time resolves needs Thermal desorption power also large, and impurity effect is to analysis; In addition in the mode of Static Adsorption, the time needs long enough, and quantitatively meeting deviation is very large.
Summary of the invention
The present invention, in order to solve now limited to the analysis Detection results of trace VOCs problem, provides a kind of ionization adsorption and enrichment device.
The present invention adopts following technical scheme to realize: a kind of ionization adsorption and enrichment device, comprise aspiration pump, ionization lamp, ionization absorption detection cell, enrichment film and voltage generator, wherein ionization absorption detection cell comprises ionization lamp protective cover and the holder be arranged at bottom protective cover, ionization lamp is arranged in ionization lamp protective cover, the lamp of ionization lamp intensifies the positive wire holder of voltage and intensifies voltage negative wire holder with lamp and be connected with voltage generator, ionization absorption detection cell is connected to aspiration pump and draft tube, aspiration pump and draft tube are all communicated with ionization lamp protective cover inner space, positive electrode and negative electrode is also provided with in ionization absorption detection cell, enrichment film is positioned at negative electrode place.
During work, under the effect of aspiration pump, air enters in ionization absorption detection cell from draft tube, ionization lamp produces ultraviolet, if the UV photons energy that ionization lamp produces is 10.6eV, this ultraviolet can make ionization energy ionize lower than most volatile organic matters of 10.6eV, then is moved on the enrichment film at negative electrode place at electric field action.After adsorption and enrichment completes, enrichment film can be taken off from device easily, be used for gas chromatograph and liquid chromatograph and gas chromatography-mass spectrography or liquid chromatograph-mass spectrometer analysis by extraction, the method for extraction can be direct injection port Thermal desorption or pyrolysis analyzer resolve or after liquid-phase extraction for gas chromatography and liquid-phase chromatographic analysis.In the present invention, the ionization of volatile organic matter is so-called soft ionization, does not produce fragment ion, remains the full detail of volatile organic matter, and volatile organic matter becomes neutral molecule and is reduced to original molecule after negative electrode obtains electronics; And for ionization energy be greater than 10.6eV volatile organic matter ionization absorption detection cell can not ionize, directly by ionization adsorb detection cell.Therefore this kind of adsorption and enrichment is optionally, and with strong points, efficiency greatly improves.
Above-mentioned one ionization adsorption and enrichment device, positive electrode is connected with micro-current detector.Micro-current detector can detect the electronics after volatile organic matter ionization, the simulating signal that micro-current detector obtains delivers to microprocessor by A/D conversion, the approximate concentration of real-time ionizable volatile organic matter can be obtained, for operator's reference after simple operation.
Above-mentioned one ionization adsorption and enrichment device, the making material of enrichment film is the compound of Tenax, molecular sieve, activated charcoal, dimethyl silicone polymer or above-mentioned material.
Above-mentioned one ionization adsorption and enrichment device, draft tube is also provided with filtration spool.
The present invention adopts brand new principle as theoretical foundation first, and with a small amount of enrichment film, the short time can complete adsorption and enrichment, and impurity adsorbs hardly simultaneously.Soft ionization can not destroy the structure of organic molecule to be measured, and the ionization energy of the VOCs of the overwhelming majority is lower than 10.6eV, effective to the VOCs of the overwhelming majority in this way, make use of electric field action in addition, do not have ionize organism can not by adsorption and enrichment, therefore the advantage that adsorption and enrichment efficiency is high is just had, the limitation of breakthrough volume is not had yet, make full use of sorbing material, make sorbing material consumption very little, the electric thermal power used during Thermal desorption can be very little, and the time of resolving is short, and the short time resolves completely becomes possibility; Also can lack much with the organic solvent used during organic solvent extraction, reduce costs and also reduce environmental pollution.Simultaneously owing to being selectivity ionization, so do not have high ionization energy compound to enter enrichment film with Impure forms, analysis result is purer.Micro-current detector can be configured after expanded function of the present invention, owing to have employed ultraviolet light photo from (PI), and micro-current detector is one of detecting device that current detection sensitivity is the highest, just can real-time estimation scene VOCs total concentration by converting, also can as certain basis for estimation.The present invention can be widely used in environment measuring, atmospheric surveillance, and water body detects, and particular surroundings detects in the fields such as analysis, biology, medical science and Surface Science, carries out quick adsorption enrichment, precisely analyze volatile organic trace compounds.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one.
Fig. 2 is the structural representation of embodiment two.
In figure: 1-positive electrode, 2-holder, 3-insulation sleeve, 4-enrichment film; 5-inlet suction port, 6-draft tube, 7-filters spool, 8-pad; 9-butterfly spring, 10-ionizes lamp, and 11-lamp intensifies the positive wire holder of voltage; 12-lamp intensifies voltage negative wire holder, 13-lamp holddown spring, 14-lamp gland nut; 15-ionizes lamp protective cover, 16-gas outlet, 17-aspiration pump; 18-front cover pad, 19-positive electrode lead, 20-film compacting nut.
Embodiment
Embodiment one: a kind of ionization adsorption and enrichment device, comprise aspiration pump 17, ionization lamp 10, ionization absorption detection cell, annular enrichment film 4 and voltage generator, wherein ionization absorption detection cell comprises ionization lamp protective cover 15 and holder 2, lamp gland nut 14 is provided with bottom ionization lamp protective cover 15, lamp holddown spring 13 is provided with in ionization lamp protective cover 15, ionization lamp 10 is arranged in ionization lamp protective cover 15, the lamp of ionization lamp 10 intensifies the positive wire holder 11 of voltage and intensifies voltage negative wire holder 12 with lamp and be connected with voltage generator, holder 2 is provided with thread segment, thread segment on holder 2 and lamp gland nut 14 coordinate, on holder 2, build-in has insulation sleeve 3, bar-shaped positive electrode 1 is inserted in insulation sleeve, ring-type negative electrode is looped around around positive electrode one end, annular enrichment film 4 is arranged at ring-type negative electrode place, ionization lamp rear portion is also provided with pad 8 and butterfly spring 9, holder 2 is also provided with inlet suction port 5, inlet suction port 5 is connected with draft tube 6, draft tube 6 is also provided with and filters spool 7, ionization lamp protective cover is connected with gas outlet 16, gas outlet 16 is connected with aspiration pump 17.
Embodiment two: a kind of ionization adsorption and enrichment device, comprise aspiration pump 17, ionization lamp 10, ionization absorption detection cell, disk enrichment film 4 and voltage generator, wherein ionization absorption detection cell comprises ionization lamp protective cover 15 and holder 2, lamp gland nut 14 is provided with bottom ionization lamp protective cover 15, lamp holddown spring 13 is provided with in ionization lamp protective cover 15, ionization lamp 10 is arranged in ionization lamp protective cover 15, the lamp of ionization lamp 10 intensifies the positive wire holder 11 of voltage and intensifies voltage negative wire holder 12 with lamp and be connected with voltage generator, holder 2 is provided with thread segment, thread segment on holder 2 and lamp gland nut 14 coordinate, sheet positive electrode 1 is arranged at the rear portion of ionization lamp 10, front cover pad 18 and insulation sleeve 3 is provided with between positive electrode 1 and ionization lamp 10, holder 2 is also provided with inlet suction port 5, inlet suction port 5 is connected with draft tube 6, draft tube 6 is also provided with and filters spool 7, holder 2 is also connected with gas outlet 16, gas outlet 16 is connected with aspiration pump 17, disc-shaped negative electrode is fixed in holder 2, and it is relative with positive electrode 1, disk enrichment film 4 is fixed on negative electrode place, enrichment film 4 is compressed by film compacting nut 20.
Claims (4)
1. an ionization adsorption and enrichment device, it is characterized in that comprising aspiration pump (17), ionization lamp (10), ionization absorption detection cell, enrichment film (4) and voltage generator, wherein ionization absorption detection cell comprises the holder (2) ionizing lamp protective cover (15) and be arranged at bottom protective cover, ionization lamp (10) is arranged in ionization lamp protective cover (15), the lamp of ionization lamp (10) intensifies the positive wire holder of voltage (11) and intensifies voltage negative wire holder (12) with lamp and be connected with voltage generator, ionization absorption detection cell is connected to aspiration pump (17) and draft tube (6), aspiration pump (17) and draft tube (6) are all communicated with ionization lamp protective cover (15) inner space, positive electrode (1) and negative electrode is also provided with in ionization absorption detection cell, enrichment film (4) is positioned at negative plate place.
2. one ionization adsorption and enrichment device according to claim 1, is characterized in that positive electrode (1) is connected with micro-current detector.
3. one ionization adsorption and enrichment device according to claim 1 and 2, is characterized in that the making material of enrichment film (4) is the compound of Tenax, molecular sieve, activated charcoal, dimethyl silicone polymer or above-mentioned material.
4. one ionization adsorption and enrichment device according to claim 1 and 2, is characterized in that draft tube (6) is also provided with and filters spool (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948217.XA CN105372357B (en) | 2015-12-17 | 2015-12-17 | A kind of ionization adsorption and enrichment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510948217.XA CN105372357B (en) | 2015-12-17 | 2015-12-17 | A kind of ionization adsorption and enrichment device |
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| Publication Number | Publication Date |
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| CN105372357A true CN105372357A (en) | 2016-03-02 |
| CN105372357B CN105372357B (en) | 2017-04-05 |
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| CN201510948217.XA Expired - Fee Related CN105372357B (en) | 2015-12-17 | 2015-12-17 | A kind of ionization adsorption and enrichment device |
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Citations (6)
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|---|---|---|---|---|
| US20040203175A1 (en) * | 2003-04-14 | 2004-10-14 | Liang Li | Apparatus and method for concentrating and collecting analytes from a flowing liquid stream |
| CN103165388A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for mass flow air enrichment analysis mass spectrum sampling in confined space |
| CN103529115A (en) * | 2012-07-05 | 2014-01-22 | 中国科学院大连化学物理研究所 | Directly-heated type tubular film enriching and sampling device used for online mass spectrum |
| CN203895411U (en) * | 2014-06-18 | 2014-10-22 | 中国科学院大连化学物理研究所 | Film gathering and sampling device of mass spectrometer |
| CN104716004A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Sampling device for non-contact type heating tubular film in mass spectrum ionization source |
| CN204462074U (en) * | 2015-01-28 | 2015-07-08 | 广东科学技术职业学院 | A kind of gas sampling for environmental monitoring and gas analyzer |
-
2015
- 2015-12-17 CN CN201510948217.XA patent/CN105372357B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040203175A1 (en) * | 2003-04-14 | 2004-10-14 | Liang Li | Apparatus and method for concentrating and collecting analytes from a flowing liquid stream |
| CN103165388A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for mass flow air enrichment analysis mass spectrum sampling in confined space |
| CN103529115A (en) * | 2012-07-05 | 2014-01-22 | 中国科学院大连化学物理研究所 | Directly-heated type tubular film enriching and sampling device used for online mass spectrum |
| CN104716004A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Sampling device for non-contact type heating tubular film in mass spectrum ionization source |
| CN203895411U (en) * | 2014-06-18 | 2014-10-22 | 中国科学院大连化学物理研究所 | Film gathering and sampling device of mass spectrometer |
| CN204462074U (en) * | 2015-01-28 | 2015-07-08 | 广东科学技术职业学院 | A kind of gas sampling for environmental monitoring and gas analyzer |
Non-Patent Citations (6)
| Title |
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| MARIA ROSA RAS 等: "Sampling and preconcentration techniques for determination of volatile organic compounds in air samples", 《TRENDS IN ANALYTICAL CHEMISTRY》 * |
| TAE-KYU KIM 等: "Membrane Inlet-based Portable Time-of-flight Mass Spectrometer for Analysis of Air Samples", 《 BULL. KOREAN CHEM. SOC.》 * |
| YUKIO YAMAMOTO 等: "Membrane introduction system for trace analysis of volatile organic compounds using a single photon ionization time-of-flight mass spectrometer", 《INTERNATIONAL JOURNAL OF MASS SPECTROMETRY》 * |
| 侯可勇 等: "快速测量挥发性有机物的膜进样-飞行时间质谱仪设计和应用", 《高等学校化学学报》 * |
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| 谭国斌 等: "高灵敏度膜进样VOCs在线检测质谱仪的研制", 《现代科学仪器》 * |
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| CN105372357B (en) | 2017-04-05 |
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Granted publication date: 20170405 Termination date: 20171217 |