CN101915743B - Method for calibrating online ozone analyzer - Google Patents
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- CN101915743B CN101915743B CN2010102213983A CN201010221398A CN101915743B CN 101915743 B CN101915743 B CN 101915743B CN 2010102213983 A CN2010102213983 A CN 2010102213983A CN 201010221398 A CN201010221398 A CN 201010221398A CN 101915743 B CN101915743 B CN 101915743B
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 19
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 241
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims abstract description 18
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 147
- 229960003753 nitric oxide Drugs 0.000 claims description 92
- 235000019391 nitrogen oxide Nutrition 0.000 claims description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 8
- 230000000717 retained effect Effects 0.000 claims description 3
- 241000273930 Brevoortia tyrannus Species 0.000 description 14
- 230000007613 environmental effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical group O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005436 troposphere Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- KHLVKKOJDHCJMG-QDBORUFSSA-L indigo carmine Chemical compound [Na+].[Na+].N/1C2=CC=C(S([O-])(=O)=O)C=C2C(=O)C\1=C1/NC2=CC=C(S(=O)(=O)[O-])C=C2C1=O KHLVKKOJDHCJMG-QDBORUFSSA-L 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention relates to a method for calibrating an online ozone analyzer, which comprises the following steps of: 1) setting an air distribution system for calibrating the online ozone analyzer; 2) determining the nitrogen oxide conversion rate of the online nitrogen oxide analyzer; 3) calibrating the measurement accuracy of the online nitrogen oxide analyzer; 4) roughly determining the concentration of ozone generated by an ozone generating device with certain ozone generation capability in an air calibrator through the online ozone analyzer; 5) obtaining an accurate concentration value of nitrogen dioxide through the online nitrogen oxide analyzer and by combining the measurement accuracy of the online nitrogen oxide analyzer, namely obtaining an accurate concentration value of the ozone generated by the ozone generating device in the step 4); 6) comparing the accurate ozone concentration value obtained by the step 5) with the ozone concentration value roughly determined by the online ozone analyzer in the step 4), and calibrating the online ozone analyzer; and 7) returning to the step 4), resetting the ozone generation capability of the ozone generating device, and performing multipoint calibration on the online ozone analyzer.
Description
Technical field
The present invention relates to a kind of scaling method, particularly about a kind of scaling method of online ozone analyzer.
Background technology
The troposphere atmospheric ozone is one of important secondary light chemical pollutant that influences atmosphere quality, visibility, aerial oxygen voltinism and health; Because its regional influence obviously; Cause the concern of environmental administration and environment R&D institution gradually; Therefore, the observation of troposphere atmospheric ozone is also brought into the daily air quality monitoring system of environmental administration gradually.At present; Assay method for ozone concentration has a lot; Wherein, sodium indigotindisulfonate AAS, ultraviolet spectrophotometry and chemiluminescence fluorescence method are three kinds of ozone analysis determining methods recommending in (GB3095-1996) of China's " ambient air quality " in 1996.And ultraviolet spectrophotometry is to use the method the most extensive, that technology is the most ripe at present; Its principle is to utilize ozone molecule to absorb the ultraviolet light under the 254nm; According to Lambert-Beer's law, can be directly per sample gas to the ozone concentration in the absorbance log calculation sample gas of ultraviolet light.These class methods need be used online ozone analyzer in implementation procedure, the simple structure of online ozone analyzer, and ruuning situation is stable.But because instrument the excessive situation of drift value can occur after under situation such as carrying, installation, part aging and reaction tank pollution, using certain hour, but drift value is less in time owing to this instrument, often is difficult in the field inspection finding.
In order to guarantee the accurate operation of online ozone analyzer, need regularly it to be demarcated.Traditional scaling method of online ozone analyzer device is to use the standard ozone generator; Produce a certain amount of, decide concentration of ozone as standard substance; After squeezing into online ozone analyzer, investigate the difference between input standard value and the instrument readout, investigate the accuracy of online ozone analyzer with this.The principle of ozone generator commonly used is made high-concentrated ozone for using high-voltage arc at present, is made into the output ozone of normal concentration through gas distributing system.Because standard ozone generator cost is higher and carry inconvenience, therefore most environmental administrations and scientific research institution, have restricted the observation effect of online ozone analyzer to a certain extent not to the independent outfit standard ozone generator of online ozone analyzer.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of strong operability, low, the accurate real-time height of device therefor cost, be applicable to the scaling method of the online ozone analyzer of field environment observation.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of scaling method of online ozone analyzer; It may further comprise the steps: 1) be provided with one and be used for gas distributing system that online ozone analyzer is demarcated, said gas distributing system comprises Zero gas generator, gas marking apparatus, online nitrogen-oxide analyzer,, online ozone analyzer, NPN calibrating gas steel cylinder and nitrogen monoxide calibrating gas steel cylinder; Be provided with three flow controllers, a mixing bunker and an ozone generating-device in the said gas marking apparatus; Be provided with the thermocatalysis reburner in the said online nitrogen-oxide analyzer; 2) NPN calibrating gas steel cylinder is connected to the gas marking apparatus after; NPN calibrating gas steel cylinder and Zero gas generator are squeezed into gas simultaneously in the gas marking apparatus; In mixing bunker, produce the NPN calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus; The NPN calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer; Utilize thermocatalysis reburner in the online nitrogen-oxide analyzer, will decide the oxides of nitrogen that contains in the NPN calibrating gas of concentration constant flow, be converted into nitrogen monoxide; Observe the difference between the nitrogen monoxide value that concentration constant flow NPN calibrating gas value and online nitrogen-oxide analyzer, read of deciding of input, confirm that the thermocatalysis reburner is to the transformation efficiency A of the oxides of nitrogen in the NPN calibrating gas in the online nitrogen-oxide analyzer; 3) nitrogen monoxide calibrating gas steel cylinder is connected to the gas marking apparatus after; Nitrogen monoxide calibrating gas steel cylinder and Zero gas generator are squeezed into gas simultaneously in the gas marking apparatus; In mixing bunker, produce the nitrogen monoxide calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus; The nitrogen monoxide calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer; The constant flow of observing input decide the difference between the nitrogen monoxide value that concentration nitrogen monoxide calibrating gas value and online nitrogen-oxide analyzer, read, and cooperation transformation efficiency A confirms the accuracy of measurement B of online nitrogen-oxide analyzer; 4) ozone generating-device in the unlatching gas marking apparatus; The ability that the ozone that ozone generating-device produces at this moment is set is a%; The span of a is 0～100; Produce a certain amount of unknown concentration ozone, this part ozone is squeezed in the online ozone analyzer through flow controller, roughly confirm the ozone concentration value C that squeezes into through online ozone analyzer; 5) open nitrogen monoxide calibrating gas steel cylinder; In the gas marking apparatus, squeeze into the nitrogen monoxide calibrating gas; Keep ozone generating-device to open simultaneously; Get into the ozone concentration that nitrogen monoxide calibrating gas concentration and ozone generating-device in the mixing bunker produce through the flow controller in gas marking apparatus control, wherein, get into nitrogen monoxide calibrating gas concentration in the mixing bunker and need surpass 1～2 times of the roughly definite ozone concentration C of online ozone analyzer; Excessive nitrogen monoxide calibrating gas and ozone reaction generate nitrogen dioxide and oxygen; Nitrogen dioxide that generates and oxygen and remaining nitrogen monoxide calibrating gas are retained in the mixing bunker in the gas marking apparatus; Then the gas in the mixing bunker is directly squeezed in the online nitrogen-oxide analyzer; Write down the content of nitrogen dioxide value that online nitrogen-oxide analyzer, is read,, obtain the accurate concentration value D of nitrogen dioxide in conjunction with the accuracy of measurement B of online nitrogen-oxide analyzer; Promptly obtaining in the step 4) ozone generating-device is under the situation of a% producing the ozone ability, the exact value D of the ozone concentration of generation; 6) demarcation of online ozone analyzer: the ozone concentration value C that online ozone analyzer in the exact value D of the ozone concentration that obtains in the step 5) and the step 4) is roughly confirmed compares, and online ozone analyzer is demarcated; 7) return step 4), reset the value of a%, online ozone analyzer is carried out multi-point calibration.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention adopts the common equipment in the field inspections such as environmental administration and R&D institution atmospheric contaminant analyzer device commonly used at present, calibrating instrument to form gas distributing system; And adopt common agents to be used for online ozone analyzer is demarcated; And need not the independent outfit standard ozone generator of online ozone analyzer; Therefore, not only practiced thrift cost, and have strong operability, convenient and swift, accuracy is high, be applicable to characteristics such as field environment observation.2, the present invention is through Zero gas generator and gas marking apparatus and NPN calibrating gas and nitrogen monoxide calibrating gas; Can confirm the conversion ratio of online nitrogen-oxide analyzer, to the oxides of nitrogen in the NPN calibrating gas; Can confirm the accuracy of measurement of online nitrogen-oxide analyzer, according to conversion ratio, lay the foundation for accurately demarcating online ozone analyzer.3, the present invention produces a certain amount of unknown concentration ozone through the ozoniferous ability of ozone generating-device in the gas marking apparatus is set, and roughly confirms the ozone concentration value through online ozone analyzer; Reaction through nitrogen monoxide calibrating gas in the gas marking apparatus and ozone then; Generate nitrogen dioxide and oxygen; According to the accuracy of measurement of online nitrogen-oxide analyzer,, can accurately measure the accurate concentration value of nitrogen dioxide, promptly obtain the exact value of ozone concentration; The exact value of this ozone concentration compares with the ozone concentration value of roughly confirming, can demarcate online ozone analyzer.4, the present invention can be through being provided with in the gas marking apparatus, the ozoniferous different ability values of ozone generating-device, and then can carry out multi-point calibration to online ozone analyzer.The present invention is skillfully constructed, and is easy to operate, and degree of accuracy is high, can be widely used in the calibration process of online ozone analyzer.
Description of drawings
Fig. 1 is the gas distributing system synoptic diagram that the present invention is used to demarcate
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
The present invention includes following steps:
1) be provided with one and be used for gas distributing system that online ozone analyzer is demarcated: as shown in Figure 1, this gas distributing system comprises conventional Zero gas generator 1, gas marking apparatus 2, online nitrogen-oxide analyzer, 3, online ozone analyzer 4, NPN calibrating gas steel cylinder 5 and nitrogen monoxide calibrating gas steel cylinder 6.Wherein, Zero gas generator 1 is used for gases such as airborne ozone, carbon monoxide, sulphuric dioxide, oxides of nitrogen are removed; Thereby produce the gas of cleaning, and the clean air that produces is squeezed in the gas marking apparatus 2, as the balance carrier gas; Dilution gets into the high concentration calibrating gas in the gas marking apparatus 2, thereby obtains deciding the calibrating gas of concentration, constant flow.Be provided with three flow controllers 21,22 and 23, one mixing bunkers 24 and an ozone generating-device 25 in the gas marking apparatus 2.Be provided with thermocatalysis reburner (not shown) in the online nitrogen-oxide analyzer, 3, effect is to convert the oxynitrides that gets in the online nitrogen-oxide analyzer, 3 into nitrogen monoxide.The NPN calibrating gas is one of gas commonly used in the atmosphere environment supervision, and English name is N-propylnitrate, and composition is: n-propyl nitrate, the NPN calibrating gas can directly be bought for demarcating transformation efficiency of the oxides of nitrogen usefulness.
2) measure the transformation efficiency of the oxides of nitrogen of online nitrogen-oxide analyzer, 3: after NPN calibrating gas steel cylinder 5 is connected to gas marking apparatus 2; NPN calibrating gas steel cylinder 5 is squeezed into gas simultaneously with Zero gas generator 1 in gas marking apparatus 2; In mixing bunker 24, produce the NPN calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus 2 21,23; The NPN calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer, 3; Utilize thermocatalysis reburner in the online nitrogen-oxide analyzer, 3 will decide the oxides of nitrogen that contains in the NPN calibrating gas of concentration constant flow, be converted into nitrogen monoxide; Observe the difference between the nitrogen monoxide value that concentration constant flow NPN calibrating gas value and online nitrogen-oxide analyzer, 3 read of deciding of input, confirm the transformation efficiency A of the oxides of nitrogen in 31 pairs of NPN calibrating gas of thermocatalysis reburner in the online nitrogen-oxide analyzer, 3.
3) the measurement accuracy of online nitrogen-oxide analyzer, 3 is demarcated: after nitrogen monoxide calibrating gas steel cylinder 6 is connected to gas marking apparatus 2; Nitrogen monoxide calibrating gas steel cylinder 6 is squeezed into gas simultaneously with Zero gas generator 1 in gas marking apparatus 2; In mixing bunker 24, produce the nitrogen monoxide calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus 2 21,23; The nitrogen monoxide calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer, 3; The constant flow of observing input decide the difference between the nitrogen monoxide value that concentration nitrogen monoxide calibrating gas value and online nitrogen-oxide analyzer, 3 read, and cooperation transformation efficiency A confirms the accuracy of measurement B of online nitrogen-oxide analyzer.
4) ozone generating-device 25 in the unlatching gas marking apparatus 2 produces a certain amount of unknown concentration ozone, because design concept; The generation concentration of ozone generating-device 25 does not have the normal concentration design in the gas marking apparatus 2; The number percent design is only arranged, and ozone generating-device 25 can ozoniferous maximum capacity be 100%, thousands of approximately ppb concentration; It is a%=30% that this step is provided with ozone generating-device 25 ozoniferous abilities; Be that ozone generating-device 25 produces 30% of ozone maximum capacity, but be not limited thereto that the span of a is 0～100; This part ozone is squeezed in the online ozone analyzer 4 through flow controller 22, roughly confirmed the ozone concentration C that squeezes into through online ozone analyzer 4.
5) open nitrogen monoxide calibrating gas steel cylinder 6; In gas marking apparatus 2, squeeze into the nitrogen monoxide calibrating gas; Keep ozone generating-device 25 to open simultaneously; Get into the ozone concentration that nitrogen monoxide calibrating gas concentration and ozone generating-device 25 in the mixing bunkers 24 produce through the flow controller in the gas marking apparatus 2 23,22 control, wherein, get into nitrogen monoxide calibrating gas concentration in the mixing bunker 24 and need surpass 1～2 times of ozone concentration C that online ozone analyzer 3 roughly confirms.Excessive nitrogen monoxide calibrating gas and ozone reaction; Generate nitrogen dioxide and oxygen; Nitrogen dioxide and oxygen and remaining nitrogen monoxide calibrating gas are retained in the mixing bunker 24 in the gas marking apparatus 2, then the gas in the mixing bunker 24 are directly squeezed in the online nitrogen-oxide analyzer, 3, write down the content of nitrogen dioxide value that online nitrogen-oxide analyzer, 3 is read; In conjunction with the accuracy of measurement B of online nitrogen-oxide analyzer, 3, can obtain the accurate concentration value D of nitrogen dioxide.Because the mol ratio of nitrogen monoxide and ozone reaction is 1: 1; And the amount of generation nitrogen dioxide and the mol ratio of required nitric oxide production amount also are 1: 1; Therefore, according to the accurate concentration value D of content of nitrogen dioxide, can obtain ozone generating-device 25 in the gas marking apparatus 2 is under 30% the situation producing the ozone ability; The accurate concentration value of the ozone that produces, promptly the accurate concentration value D with nitrogen dioxide is identical.
6) demarcation of online ozone analyzer: the ozone concentration value C that online ozone analyzer 4 in the accurate concentration value D of the ozone that obtains in the step 5) and the step 4) is roughly confirmed compares, and online ozone analyzer 4 is demarcated.
7) owing to accurately obtained the ozone generating-device 25 in the gas marking apparatus 2; It in ozoniferous ability the ozone concentration under 30% the situation; Therefore, can return step 4), reset ozone generating-device 25 ozoniferous ability a%; For example a%=10%, a%=50% etc.; Confirm the exact value of the ozone concentration of generation under the different ability conditions, therefore can very easily carry out multi-point calibration, thereby confirm the degree of accuracy of online ozone analyzer 4 accurately online ozone analyzer 4.
The contrast of the inventive method and traditional scaling method is compared:
In order to verify the accuracy of the inventive method; Through using this method and standard ozone generator (49PS) to contrast in the field inspection at the scene; Comparing result shows; This method calibrated error can satisfy in the field inspection calibration request to online ozone analyzer fully between 1%～3%.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (1)
1. the scaling method of an online ozone analyzer, it may further comprise the steps:
1) be provided with one and be used for gas distributing system that online ozone analyzer is demarcated, said gas distributing system comprises Zero gas generator, gas marking apparatus, online nitrogen-oxide analyzer,, NPN calibrating gas steel cylinder and nitrogen monoxide calibrating gas steel cylinder; Be provided with three flow controllers, a mixing bunker and an ozone generating-device in the said gas marking apparatus; Be provided with the thermocatalysis reburner in the said online nitrogen-oxide analyzer;
2) NPN calibrating gas steel cylinder is connected to the gas marking apparatus after; NPN calibrating gas steel cylinder and Zero gas generator are squeezed into gas simultaneously in the gas marking apparatus; In mixing bunker, produce the NPN calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus; The NPN calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer; Utilize thermocatalysis reburner in the online nitrogen-oxide analyzer, will decide the oxides of nitrogen that contains in the NPN calibrating gas of concentration constant flow, be converted into nitrogen monoxide; Observe the difference between the nitrogen monoxide value that concentration constant flow NPN calibrating gas value and online nitrogen-oxide analyzer, read of deciding of input, confirm that the thermocatalysis reburner is to the transformation efficiency A of the oxides of nitrogen in the NPN calibrating gas in the online nitrogen-oxide analyzer;
3) nitrogen monoxide calibrating gas steel cylinder is connected to the gas marking apparatus after; Nitrogen monoxide calibrating gas steel cylinder and Zero gas generator are squeezed into gas simultaneously in the gas marking apparatus; In mixing bunker, produce the nitrogen monoxide calibrating gas of deciding the concentration constant flow through the flow controller in the gas marking apparatus; The nitrogen monoxide calibrating gas of deciding the concentration constant flow that produces is driven in the online nitrogen-oxide analyzer; The constant flow of observing input decide the difference between the nitrogen monoxide value that concentration nitrogen monoxide calibrating gas value and online nitrogen-oxide analyzer, read, and cooperation transformation efficiency A confirms the accuracy of measurement B of online nitrogen-oxide analyzer;
4) ozone generating-device in the unlatching gas marking apparatus; The ability that the ozone that ozone generating-device produces at this moment is set is a%; The span of a is 0～100; Produce a certain amount of unknown concentration ozone, this part ozone is squeezed in the online ozone analyzer through flow controller, roughly confirm the ozone concentration value C that squeezes into through online ozone analyzer;
5) open nitrogen monoxide calibrating gas steel cylinder; In the gas marking apparatus, squeeze into the nitrogen monoxide calibrating gas; Keep ozone generating-device to open simultaneously; Get into the ozone concentration that nitrogen monoxide calibrating gas concentration and ozone generating-device in the mixing bunker produce through the flow controller in gas marking apparatus control, wherein, get into nitrogen monoxide calibrating gas concentration in the mixing bunker and need surpass 1～2 times of the roughly definite ozone concentration C of online ozone analyzer; Excessive nitrogen monoxide calibrating gas and ozone reaction generate nitrogen dioxide and oxygen; Nitrogen dioxide that generates and oxygen and remaining nitrogen monoxide calibrating gas are retained in the mixing bunker in the gas marking apparatus; Then the gas in the mixing bunker is directly squeezed in the online nitrogen-oxide analyzer; Write down the content of nitrogen dioxide value that online nitrogen-oxide analyzer, is read,, obtain the accurate concentration value D of nitrogen dioxide in conjunction with the accuracy of measurement B of online nitrogen-oxide analyzer; Promptly obtaining in the step 4) ozone generating-device is under the situation of a% producing the ozone ability, the exact value D of the ozone concentration of generation;
6) demarcation of online ozone analyzer: the ozone concentration value C that online ozone analyzer in the exact value D of the ozone concentration that obtains in the step 5) and the step 4) is roughly confirmed compares, and online ozone analyzer is demarcated;
7) return step 4), reset the value of a%, online ozone analyzer is carried out multi-point calibration.
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| CN103399127B (en) * | 2013-08-16 | 2015-08-19 | 中国环境科学研究院 | A kind of gas analyzer calibration measurements device and calibration measuring method thereof |
| CN105314601A (en) * | 2014-07-29 | 2016-02-10 | 潘本锋 | Novel standard ozone generator |
| CN105911222A (en) * | 2016-04-18 | 2016-08-31 | 中国石油化工股份有限公司 | Metrological verification device for ammonia gas detector and metrological verification method thereof |
| CN107219324B (en) * | 2017-07-13 | 2023-06-06 | 中国科学院城市环境研究所 | Ozone purification evaluation system and method with adjustable humidity and content |
| CN109187456B (en) * | 2018-08-17 | 2020-10-20 | 南京科略环境科技有限责任公司 | System for monitoring photochemical generation rate of total atmospheric oxidant |
| CN110763639A (en) * | 2019-11-13 | 2020-02-07 | 上海市计量测试技术研究院 | Calibration method of ozone analyzer in water |
| CN110987911A (en) * | 2020-01-06 | 2020-04-10 | 北京雪迪龙科技股份有限公司 | Ozone analysis method and ozone analyzer based on chemiluminescence method |
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