CN103163207A - Method for detecting sulfur dioxide (SO2) in air in qualitative mode - Google Patents
Method for detecting sulfur dioxide (SO2) in air in qualitative mode Download PDFInfo
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- CN103163207A CN103163207A CN2012100272454A CN201210027245A CN103163207A CN 103163207 A CN103163207 A CN 103163207A CN 2012100272454 A CN2012100272454 A CN 2012100272454A CN 201210027245 A CN201210027245 A CN 201210027245A CN 103163207 A CN103163207 A CN 103163207A
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Abstract
The invention discloses a method for detecting sulfur dioxide (SO2) in air in a qualitative mode, and particularly relates to the method for detecting the SO2 through an ionic migration spectrometer. The method can achieve high sensitivity detection for the SO2.
Description
Technical field
The present invention relates to sulphuric dioxide (SO in air
2) qualitative analysis detect, be that a kind of use ionic migration spectrometer detects SO
2Method.This method can realize SO
2Fast detecting, simultaneously also widened the kind that ionic migration spectrometer can detection compound.
Background technology
SO
2It is a kind of important air environmental pollution thing.It is mainly from the burning of sulfur-bearing coal, oil and natural gas, and the release of gas in the mineral mining process.In addition, some natural processes such as volcanicity are also discharged a certain amount of SO
2Gas.SO
2The organs such as people's eye, nose, throat, lung had strong impulse; Can cause mucositis, sense of smell and dysgeusia, the chronic diseases such as lassitude.In addition, its most outstanding environmental characteristics is oxidation finally to form sulfuric acid and sulfate in atmosphere, is one of origin cause of formation of acid rain and chemical fumes.Therefore, to SO
2Rapid sensitive detect and also just to seem most important.
The technology that can be used for this purpose is Ion mobility spectrometry, is abbreviated as in the art IMS; Identical abbreviation also is used for implementing the instrument of this technology, expression " ionic migration spectrometer " in this case.Ion mobility spectrometry is as a kind of gas phase analysis method, have highly sensitive, fast response time, cheap, the advantage such as easy to use is very suitable for the on-line analysis of gaseous sample.Under suitable operating conditions, this instrument can detect in its medium with pico-gram (pg, namely 10
-12Gram) amount of the order of magnitude or a (ppt is equivalent to every 10 with trillion parts
12The molecule of an analyte in the gas molecule of sample) gas or the evaporative substance of the existence of the concentration of magnitude.
The IMS instrument is mainly received with detection system by ion gun, reaction zone, ion gate, migration area and ion and forms.Ion gun is the place that in ionic migration spectrometer, " reagent ion " forms, and these reagent ions are introduced in reaction zone and react with sample generation molion to be analyzed, generate product ion.Described reaction zone utilizes ion gate and migration area to separate, and when remaining on suitable electromotive force on described ion gate, stops the ion that produces at reaction zone to enter into the migration area.When the electromotive force of ion gate is cancelled, can allow part ion to enter the migration area, be this moment " time zero " of analysis.Described Disengagement zone comprises a series of electrode, and these electrodes produce electric field, receives and detection system thereby take ion to ion from reaction zone.This zone remains under atmospheric pressure, the air-flow of existence and ion motion opposite direction in this zone, and this air-flow is defined as " floating gas " in the art, is very pure gas.The movement velocity of ion depends on the mobility of same ion in electric field and gas medium, thereby different ions spends the different time by the migration area and arrives ion reception and detection system.Ion receives and the time of detection system becomes " flight time " to arriving from time zero.Described ion is received by ion and detection system receives and detects, and finally provides the peak of corresponding ion in spectrogram as the function of flight time; Known test condition just might be determined the existence of evaluating objects material by determining this time, just may calculate the concentration of respective substance and use appropriate algorithm calculating peak area.
Summary of the invention
The present invention will provide a kind of use ionic migration spectrometer qualitative detection air to trample sulphuric dioxide (SO
2) method.This ionic migration spectrometer is equipped with under atmospheric pressure can produce reagent ion O
3 -(H
2O)
nIon gun, utilize this reagent and SO
2Between O
-Ion-transfer reacts to SO
2Ionize and detect.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of method of sulphuric dioxide in qualitative detection air uses ionic migration spectrometer to SO
2Detect, it is characterized in that:
Be applied under atmospheric pressure and can produce reagent ion O
3 -(H
2O)
nIon gun as the ion gun of ion mobility spectrometry instrument.
Sample gas is for being mixed with SO
2Air, and use pure air as floating gas in the migration area of ion mobility spectrometry instrument.
What pass in ionic migration spectrometer floats volume ratio between airshed and sample gas flow more than or equal to 1.Wherein said volume ratio is between 2-5.
Described air be atmosphere through a kind of in activated charcoal, silica gel and molecular sieve or filter more than two kinds after pure air.Wherein the humidity of pure air is below 10ppmv.
Describedly can produce reagent ion O
3 -(H
2O)
nIon gun be ultraviolet light photoemission ion gun, corona discharge or glow discharge plasma source.
Advantage of the present invention is:
The method is portable, can realize SO
2Fast high-sensitive detect.The detection sensitivity of the method can reach the ppt magnitude.
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Description of drawings:
Fig. 1, ultraviolet light photoemission ion gun ionic migration spectrometer schematic diagram;
Fig. 2, ionic migration spectrometer in pure air reagent ion spectrogram (a) and use this instrument to detect 10ppbv SO
2The time spectrogram (b);
Embodiment:
The present invention has utilized ionic migration spectrometer to detect SO
2, concrete device is seen Fig. 1.It mainly comprises several parts: ultraviolet light photoemission ion gun 1, transference tube and ion receive and detection system 3, sample gas entrance 4, float gas entrance 5 and tail gas outlet 6; Wherein ultraviolet light photoemission ion gun 1 comprises 10.6eV VUV lamp 1-1, metal grid mesh 1-2 and insulation support body 1-3; Transference tube 2 comprises reaction zone 2-1, ion gate 2-2 and migration area 2-3.When work, at the stimulated the menstrual flow pure air of activated charcoal, silica gel and molecular sieve filtration of the gas inlet 5 of ionic migration spectrometer, at the logical SO of sample gas entrance
2The sample gas of mixing with pure air, the flow velocity that wherein floats gas are more than 1 times of sample gas flow velocity.Produce negative reagent ion O in ultraviolet light photoemission ion gun
3 -(H
2O)
nEnter into reaction zone, and enter into the SO of reaction zone through the sample gas entrance
2The final SO that generates of reaction
5 -(H
2O)
nIon, this ion enter the migration area and separate with other ions in the process of migration and finally received by ion and detection system reception and detection under the control of ion gate pulse.
Fig. 2 has provided the experiment spectrogram the present invention has been given and explanation.Experiment condition is: migration tube length is 8.8cm, and migration electric field intensity is 242.5V/cm, and the ion gate time of opening the door is 0.2ms, and the cycle is 100ms, floats gas and is the pure air of processing through silica gel, activated charcoal and molecular sieve, and wherein moisture content is lower than 10ppmv.Float gas velocity 400sccm, sample gas flow velocity 50sccm.During experiment, the temperature of migration tube is 30.5 ℃.Sample gas is atmosphere.
Fig. 2 has provided ionic migration spectrometer and do not contained SO in sample gas
2Migration spectrogram (a) and sample gas in contain 10ppbv SO
2The time spectrogram (b).As can be seen from the figure, there is no SO in sample gas
2The time, can only observe the peak of reagent ion in the spectrogram that ionic migration spectrometer obtains, transit time is the peak of 12.78ms.Contain 10ppbv SO in sample gas
2The time, both can observe the peak of reagent ion in the spectrogram that ionic migration spectrometer obtains, transit time is the peak of 12.78ms, can observe SO simultaneously
2Quasi-molecular ions, transit time is the peak of 14.32ms.
Claims (7)
1. the method for sulphuric dioxide in a qualitative detection air, use ionic migration spectrometer to SO
2Detect, it is characterized in that:
Be applied under atmospheric pressure and can produce reagent ion O
3 -(H
2O)
nIon gun as the ion gun of ion mobility spectrometry instrument.
2. method according to claim 1, it is characterized in that: sample gas is for being mixed with SO
2Air, and use pure air as floating gas in the migration area of ion mobility spectrometry instrument.
3. method according to claim 2 is characterized in that: what pass in ionic migration spectrometer floats volume ratio between airshed and sample gas flow more than or equal to 1.
4. method according to claim 3, it is characterized in that: wherein said volume ratio is between 2-5.
5. method according to claim 1 and 2 is characterized in that: described air be atmosphere through a kind of in activated charcoal, silica gel and molecular sieve or filter more than two kinds after pure air.
6. method according to claim 5, it is characterized in that: wherein the humidity of pure air is below 10ppmv.
7. method according to claim 1 is characterized in that: describedly can produce reagent ion O
3 -(H
2O)
nIon gun be ultraviolet light photoemission ion gun, corona discharge or glow discharge plasma source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100272454A CN103163207A (en) | 2011-12-19 | 2012-02-08 | Method for detecting sulfur dioxide (SO2) in air in qualitative mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110427276.4 | 2011-12-19 | ||
| CN201110427276 | 2011-12-19 | ||
| CN2012100272454A CN103163207A (en) | 2011-12-19 | 2012-02-08 | Method for detecting sulfur dioxide (SO2) in air in qualitative mode |
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|---|---|
| CN103163207A true CN103163207A (en) | 2013-06-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535499A (en) * | 2015-01-14 | 2015-04-22 | 成都海兰天澄科技有限公司 | Sulfur dioxide online monitoring method |
| CN104713942A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Method for rapidly achieving reducing-state sulfide multi-mode recognition |
| CN106841372A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | It is a kind of to monitor NO in air simultaneouslyX、O3And SO2Method |
| CN111220445A (en) * | 2018-11-27 | 2020-06-02 | 中国科学院大连化学物理研究所 | Dynamic preparation device for gas sample |
Citations (4)
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|---|---|---|---|---|
| US5095206A (en) * | 1990-06-01 | 1992-03-10 | Environmental Technologies Group, Inc. | Method and apparatus for improving the specificity of an ion mobility spectrometer utillizing sulfur dioxide dopant chemistry |
| CN101113968A (en) * | 2006-07-27 | 2008-01-30 | 中国科学院大连化学物理研究所 | Method for on-line measuring drug-making chemicals with ion transfer spectrometer |
| CN101382521A (en) * | 2007-09-04 | 2009-03-11 | 中国科学院大连化学物理研究所 | Method for enhancing sensitivity of ionic migration spectrum |
| CN101452806A (en) * | 2007-12-05 | 2009-06-10 | 中国科学院大连化学物理研究所 | Ionization source and its application in mass spectra or ion transfer |
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2012
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Patent Citations (4)
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|---|---|---|---|---|
| US5095206A (en) * | 1990-06-01 | 1992-03-10 | Environmental Technologies Group, Inc. | Method and apparatus for improving the specificity of an ion mobility spectrometer utillizing sulfur dioxide dopant chemistry |
| CN101113968A (en) * | 2006-07-27 | 2008-01-30 | 中国科学院大连化学物理研究所 | Method for on-line measuring drug-making chemicals with ion transfer spectrometer |
| CN101382521A (en) * | 2007-09-04 | 2009-03-11 | 中国科学院大连化学物理研究所 | Method for enhancing sensitivity of ionic migration spectrum |
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|---|
| 陈创等: "含硫环境污染物的离子迁移谱检测", 《第六届全国环境化学大会暨环境科学仪器与分析仪器展览会摘要集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713942A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Method for rapidly achieving reducing-state sulfide multi-mode recognition |
| CN104535499A (en) * | 2015-01-14 | 2015-04-22 | 成都海兰天澄科技有限公司 | Sulfur dioxide online monitoring method |
| CN104535499B (en) * | 2015-01-14 | 2017-05-03 | 成都海兰天澄科技股份有限公司 | Sulfur dioxide online monitoring method |
| CN106841372A (en) * | 2015-12-07 | 2017-06-13 | 中国科学院大连化学物理研究所 | It is a kind of to monitor NO in air simultaneouslyX、O3And SO2Method |
| CN111220445A (en) * | 2018-11-27 | 2020-06-02 | 中国科学院大连化学物理研究所 | Dynamic preparation device for gas sample |
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Application publication date: 20130619 |