CN109459404A - A kind of infrared-gas pond dynamic sample injection method - Google Patents
A kind of infrared-gas pond dynamic sample injection method Download PDFInfo
- Publication number
- CN109459404A CN109459404A CN201811602174.XA CN201811602174A CN109459404A CN 109459404 A CN109459404 A CN 109459404A CN 201811602174 A CN201811602174 A CN 201811602174A CN 109459404 A CN109459404 A CN 109459404A
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- gas
- sampling valve
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- vacuum pump
- pond
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002347 injection Methods 0.000 title claims abstract description 12
- 239000007924 injection Substances 0.000 title claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 230000006837 decompression Effects 0.000 claims abstract description 15
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000011017 operating method Methods 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of infrared-gas pond dynamic sample injection method, it includes: S1, after the complete gas cell of sample rinse, sampling valve is closed, vacuum pump is opened, gas cell is vacuumized；S2, while not closing vacuum pump, not exclusively opening sampling valve so that exhaust gas is quickly discharged in decompression table；S3, vacuum pump is closed, opens sampling valve, allows sample gas gassy pond；S4, emptying balanced valve is opened；S5, sampling valve is closed, makes in gas cell pressure balance in 0.1MPa；S6, balanced valve is closed, closes sampling valve, is tested.Sample introduction operating method of the invention, innovatively after rinse gas cell, vacuumizing, in the case where not closing vacuum pump, slowly open sampling valve, and by the appropriate pressure in regulating gas pond, so that the exhaust gas of remaining is all discharged in rinse decompression table, detection error caused by causing under test gas ingredient to change because of decompression table absorption is avoided, detection accuracy is improved, the detection of corrosivity under test gas is particularly suitable for.
Description
Technical field
The present invention relates to a kind of infrared analysis operating methods, and in particular to a kind of infrared-gas pond dynamic sample injection method.
Background technique
High-pressure air source needs to be depressurized by pressure reducer before sample introduction to obtain the pressure needed.In conventional decompression table
There is gauze element, its purpose is to reduce solid particulate matter to enter gas circuit.But when test gas be corrosive gas such as
Whens HCl, HF etc., because the high-ratio surface of gauze element makes gas be easy to generate chemisorption in decompression table, to generate
Large error and repeatability reduction.Be a confined space in decompression table and in rinse gas cell, gas residence time compared with
It is long, increase adsorbance, gas actual concentrations substantially reduce.So introducing dynamic sampling system, the error that absorption generates is reduced.
Summary of the invention
The purpose of the present invention is overcoming existing sample injection method for being easy to cause error when test corrosive gas, one is provided
Kind dynamic sampling system, avoids the large amount of adsorption of corrosive gas, improves detection accuracy.
In order to achieve the above object, the present invention provides a kind of infrared-gas pond dynamic sample injection method, this method includes:
S1, after the complete gas cell of sample rinse, close sampling valve, open vacuum pump, gas cell is vacuumized；
S2, while not closing vacuum pump, not exclusively opening sampling valve so that exhaust gas is quickly discharged in decompression table；
S3, vacuum pump is closed, fully opens sampling valve, allow sample gas gassy pond；
S4, emptying balanced valve is opened；
S5, sampling valve is closed, makes in gas cell pressure balance in 0.1MPa；
S6, balanced valve is closed, closes sampling valve, is tested.
Preferably, being evacuated to pressure P≤0MPa of gas cell in step S1.
Preferably, sampling valve is gradually opened in step S2, and not exclusively open.
Preferably, keeping pressure 0.03-0.05MPa in gas cell in step S2, the retention time is 10-15 seconds.
Preferably, pressure is in 0.1-0.15Mpa in gas cell in step S3.
Preferably, keeping pressure in gas cell 10-15 seconds at 0.1MPa (i.e. 1 standard atmospheric pressure) in step S4.
Sample introduction operating method of the invention, innovatively after rinse gas cell, vacuumizing, the case where not closing vacuum pump
Under, sampling valve is slowly opened, and by the appropriate pressure in regulating gas pond, so that exhaust gas remaining in rinse decompression table
All discharges avoid because decompression table absorption causes detection error caused by the change of under test gas ingredient, improve detection
Precision is particularly suitable for the detection of corrosivity under test gas.
Specific embodiment
" exhaust gas " described herein refers to the under test gas gas that cost changes after the absorption of decompression table filter core.
" dynamic sample introduction " as described herein, which refers to, is not closing vacuum pump, i.e., under evacuated state, while slowly open into
Sample valve, to gas cell sample introduction.
The following further describes the technical solution of the present invention below.
The operating method of infrared-gas pond dynamic sample introduction of the invention includes:
S1, after the complete gas cell of sample rinse, close sampling valve, open vacuum pump, gas cell is vacuumized, at this time P≤
0MPa。
S2, while not closing vacuum pump, open sampling valve.Sampling valve need to be opened slowly and cannot open foot.Vacuum pump
It is working at this time, holding sufficient sampling valve can be such that sample gas is largely lost, and cause excessive loads to reduce the use longevity pumped vacuum pump
Life.Pressure 0.03-0.05MPa is kept in gas cell at this time, the retention time is 10-15 seconds.In the step while vacuumizing
Slow sample introduction can allow exhaust gas in decompression table to be quickly discharged.When the exhaust gas is referred to because of rinse, under test gas is in decompression table
It is detained and causes the gas after largely adsorbing.
S3, vacuum pump is closed, opens (opening foot) sampling valve, allows sample gas gassy pond.Pressure exists in gas cell at this time
0.1-0.15Mpa。
S4, emptying balanced valve is opened, keeps pressure in gas cell 10-15 seconds in 0.1MPa or so.The purpose of the step
Be in order to later can faster pressure in balanced gas pond, reduce the time that gas may chemically react in gas cell.
S5, sampling valve is closed, makes in gas cell pressure balance in 0.1MPa.
S6, balanced valve is closed, closes sampling valve, is tested.
Sample introduction operating method of the invention, innovatively after rinse gas cell, vacuumizing, the case where not closing vacuum pump
Under, sampling valve is slowly opened, and by the appropriate pressure in regulating gas pond, so that exhaust gas remaining in rinse decompression table
All discharges avoid because decompression table absorption causes detection error caused by the change of under test gas ingredient, improve detection
Precision is particularly suitable for the detection of corrosivity under test gas.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. a kind of infrared-gas pond dynamic sample injection method, which is characterized in that this method includes:
S1, after the complete gas cell of sample rinse, close sampling valve, open vacuum pump, gas cell is vacuumized；
S2, while not closing vacuum pump, not exclusively opening sampling valve so that exhaust gas is quickly discharged in decompression table；
S3, vacuum pump is closed, fully opens sampling valve, allow sample gas gassy pond；
S4, emptying balanced valve is opened；
S5, sampling valve is closed, makes in gas cell pressure balance in 0.1MPa；
S6, balanced valve is closed, closes sampling valve, is tested.
2. infrared-gas pond dynamic sample injection method as described in claim 1, which is characterized in that in step S1, be evacuated to gas
Pressure P≤the 0MPa in body pond.
3. infrared-gas pond dynamic sample injection method as described in claim 1, which is characterized in that in step S2, sampling valve is gradually
It opens, and not exclusively opens.
4. infrared-gas pond dynamic sample injection method as claimed in claim 3, which is characterized in that in step S2, protected in gas cell
Pressure 0.03-0.05MPa is held, the retention time is 10-15 seconds.
5. infrared-gas pond dynamic sample injection method as described in claim 1, which is characterized in that in step S3, gas cell internal pressure
Power is in 0.1-0.15Mpa.
6. infrared-gas pond dynamic sample injection method as described in claim 1, which is characterized in that in step S4, make in gas cell
Pressure is kept for 10-15 seconds in 0.1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811602174.XA CN109459404B (en) | 2018-12-26 | 2018-12-26 | Dynamic sample introduction method for infrared gas pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811602174.XA CN109459404B (en) | 2018-12-26 | 2018-12-26 | Dynamic sample introduction method for infrared gas pool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109459404A true CN109459404A (en) | 2019-03-12 |
| CN109459404B CN109459404B (en) | 2021-04-20 |
Family
ID=65614805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811602174.XA Active CN109459404B (en) | 2018-12-26 | 2018-12-26 | Dynamic sample introduction method for infrared gas pool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109459404B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060289778A1 (en) * | 2003-09-09 | 2006-12-28 | Francois Vincent | Apparatus and method for detection of vacuum ultraviolet radiation |
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2018
- 2018-12-26 CN CN201811602174.XA patent/CN109459404B/en active Active
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| CN102331358A (en) * | 2011-06-07 | 2012-01-25 | 安徽科力仪器有限公司 | Non-pollution and rapid sampling method for liquid and apparatus thereof |
| CN104198393A (en) * | 2014-04-29 | 2014-12-10 | 贵州电力试验研究院 | On-line monitoring system and method for SF6 decomposition gas components in electrical equipment |
| CN103983799A (en) * | 2014-05-26 | 2014-08-13 | 中国科学技术大学 | Pulse sampling device for gas, pulse sampling method, and application of method |
| CN104198427A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院电工研究所 | Photo-acoustic spectrometry detection device utilizing radial structure |
| CN105223152A (en) * | 2015-09-18 | 2016-01-06 | 苏州萨伯工业设计有限公司 | A kind of oxygen nitrogen analysis detection method |
| CN105136671A (en) * | 2015-10-09 | 2015-12-09 | 厦门钨业股份有限公司 | Gas pond for fluorine-containing gas infrared spectroscopic analysis and application of gas pond to fluorine-containing gas analysis detection |
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| CN109459404B (en) | 2021-04-20 |
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