CN201392346Y - Colorimetry ammonia nitrogen on-line automatic monitoring device - Google Patents
Colorimetry ammonia nitrogen on-line automatic monitoring device Download PDFInfo
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- CN201392346Y CN201392346Y CN200920141603U CN200920141603U CN201392346Y CN 201392346 Y CN201392346 Y CN 201392346Y CN 200920141603 U CN200920141603 U CN 200920141603U CN 200920141603 U CN200920141603 U CN 200920141603U CN 201392346 Y CN201392346 Y CN 201392346Y
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- ammonia nitrogen
- monitoring device
- colourimetry
- auto monitoring
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000004737 colorimetric analysis Methods 0.000 title claims abstract description 36
- 238000012806 monitoring device Methods 0.000 title claims abstract description 22
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
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- 229960001860 salicylate Drugs 0.000 claims description 5
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- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims description 4
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- 239000002537 cosmetic Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 15
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 12
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- 239000010865 sewage Substances 0.000 abstract description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 22
- 238000000034 method Methods 0.000 description 16
- 229910021529 ammonia Inorganic materials 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
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- 238000010521 absorption reaction Methods 0.000 description 4
- 238000002798 spectrophotometry method Methods 0.000 description 4
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- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 229960004889 salicylic acid Drugs 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- XEYBHCRIKKKOSS-UHFFFAOYSA-N disodium;azanylidyneoxidanium;iron(2+);pentacyanide Chemical compound [Na+].[Na+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].[O+]#N XEYBHCRIKKKOSS-UHFFFAOYSA-N 0.000 description 1
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- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
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- 229960002523 mercuric chloride Drugs 0.000 description 1
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 1
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- 229940083618 sodium nitroprusside Drugs 0.000 description 1
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- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Te utility model discloses a colorimetry ammonia nitrogen on-line automatic monitoring device. The automatic monitoring device comprises sample offering devices and a reaction device which are connected in sequence through a pipeline; and a metering device is arranged in front of each sample offering device. The automatic monitoring device is characterized in that a peristaltic pump provided with a photoelectric gauge pipe is arranged at the tail end of each metering device. The utility model enables reagents and samples to be quantified accurately, ensures more accurate and more reliable results, and can be suitable for on-line automatic monitoring on sewage water and surface water with 0.1 to 40 mg/L of ammonia nitrogen pollution.
Description
Technical field
The utility model belongs to water quality monitoring instrument field, in particular, relates to the instrument of ammonia nitrogen in the online detection water of a kind of computer-controlled energy.
Background technology
Ammonia nitrogen (NH
3-N) be a kind of important water environment pollution thing, the concentration of ammonia nitrogen is reflecting that water environment is subjected to ammonia (NH
3) and ammonium (NH
4 +) pollution level.Ammonia nitrogen makes the water body blackout smelly not only as the dissolved oxygen DO (DO) in the reducing substances meeting consume water; And ammonia nitrogen can make surface water " eutrophication " as most important nutritive salt, impels microorganism, micropropagation of plants in the water, absorbs airborne CO
2Form the CHO class organic contamination of water environment; Simultaneously, ammonia nitrogen and its derivant have been proved diseases such as meeting cause cancer in tap water.Therefore, ammonia nitrogen be the ratio organic contaminant (COD) of generally acknowledging more lastingly, more poisonous and hazardous pollutant.
In order to solve above-mentioned water environment pollution problem, need to measure the ammonia nitrogen concentration that contains in the water quality.4 kinds of methods are arranged at present: distillation and titrimetry, nessler reagent colourimetry, salicylic acid spectrophotometric method and ammonia gas-sensing electrode method in the prior art, the distillation titrimetry is applicable to concentration sewage monitoring higher, that emission point is far away, and the latter two are applicable to the surface water monitoring that concentration is very low.
The distillation titrimetry is to generate ammonia according to ammonia (or ammonium) under alkali condition, and ammonia very easily is dissolved in the neutral solution of pH value, utilizes the acid-base neutralization principle then, does the titration absorption liquid with hydrochloric acid or sulfuric acid, just can understand the pollution level of ammonia in the sewage.Ammonia nitrogen in dirty (giving up) water all being transformed into ammonia, then ammonia being displaced from water sample, is to influence determination data for the clean-up performance that prevents dirt (giving up) water; The ammonia of displacing from water sample is absorbed liquid and all absorbs.The nessler reagent colourimetry is to adopt the alkaline solution and the ammonia react of mercuric iodixde and potassium iodide to generate light red brown colloidization compound, and its colourity is directly proportional with ammonia-nitrogen content, understands the concentration of ammonia nitrogen in the sample by its absorbance of measuring solution; Be applicable to concentration surface water monitoring very low, cleaning; Owing to during this method preparation nessler reagent, need poisonous chemicals mercuric chloride (HgCl
2).In order to prevent polluted surface water, this method has seldom been selected in online detection for use; And the analysis upper limit of this method only is 2mg/L, and the ammonia nitrogen concentration overwhelming majority of dirty (giving up) water does not detect so this method is suitable for the ammonia nitrogen concentration of sewage, industrial waste water between 3～30mg/L.
The salicylic acid spectrophotometric method also is applicable to the low concentration method, and it is according in the presence of sodium nitroprusside, and ammonium and salicylate and hypochlorite ion reaction generate blue compound, can be measured with spectrophotometric method at about 697nm place.Spectrophotometric method also can realize by colourimetry.
The ammonia gas-sensing electrode method, promptly ammonium ion is selected the electrode method, is a kind of detection method that new development is in recent years got up, and often is applied to ammonia nitrogen content mensuration in the water, and the line of also being everlasting uses.Because domestic not with this methodological standardization, the research and development and the production standard of each manufacturer have a long way to go, electrode quality differs; And when monovalent cation concentration was higher in the water, the error of this method was bigger.
Based on above method, prior art has been developed some ammonia nitrogen detecting instruments, ammonia nitrogen online automatic monitor in a kind of water was disclosed on April 16th, 2003 as Chinese patent ZL02235018.7, comprise reactor, absorption cell, conductivity meter and electric apparatus control apparatus, particularly between reactor and absorption cell, be provided with the delivery pipe of a conveying ammonia nitrogen gas, establish the electrode of the mensuration electric conductivity value of a connection conductivity meter in the absorption cell.This patent is that ammonium ion is selected the determination of electrode ammonia nitrogen content, because its method is in the mix of existing market, thus this invention be difficult to be applied, and when monovalent cation concentration is higher in water, the result error that this instrument is surveyed is bigger, and the manufacturing cost of this method is higher.
Chinese patent ZL03242314.4 discloses a kind of water quality ammonia nitrogen online automatic monitor on October 29th, 2003, be to come some component content in the test water by means of chemistry, the physical property of measuring material, specifically, be to adopt the improvement of photoelectric colorimetry to the structure that a kind of instrument is done of on-line monitoring water quality ammonia nitrogen concentration.It is based on the basic building block of the ammonia nitrogen online automatic monitor of photometry, promptly by the sampling unit, metering units, the reagent storage element, reactor unit, detecting unit, displayed record unit, industry control, data processing and transmission unit are formed, but reactor unit described in the utility model and detecting unit are made up of a photoelectric colorimetry pond.The method that this invention is adopted is to adopt photoelectric colorimetry to measure ammonia nitrogen content in the water, but does not carry out accurate application of sample because the reagent of this method adds, and causes the data result error that obtains bigger.
Because there is defective more or less in the ammonia nitrogen monitoring instrument in the prior art, and present stage environmental protection pay attention to day by day, one can make things convenient for on-line monitoring, and the demand that can solve the defective that has monitor now again is more and more urgent.The present invention comes therefrom.
The utility model content
The utility model provides a kind of new ammonia nitrogen pick-up unit, has solved problems such as ammonia nitrogen monitor error is big in the prior art, failure rate is higher, maintenance cost is bigger.
In order to solve the above-mentioned problems in the prior art, the solution that the utility model provides is as follows:
A kind of colourimetry ammonia nitrogen online auto monitoring device, the sample generator, the reaction unit that comprise pipeline connection successively, before described sample generator, measuring apparatus is set respectively, it is characterized in that described measuring apparatus is the peristaltic pump that the rear end is provided with the photoelectrometer buret.
Preferably, described photoelectrometer buret comprises the gauge line of determining volume, and described gauge line arranged outside has photoelectric detector, and photoelectric detector links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
Preferably, described photoelectric detector comprises that being in metering emissive source and the metering that the gauge line outside distributes accepts the source, and metering is accepted the source and accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.
Preferably, in described reaction unit arranged outside the photoelectric colorimetry detecting device is arranged, described photoelectric colorimetry detecting device comprises and is in the emissive source that the reaction unit outside distributes and accepts the source, and the source of acceptance is accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that emissive source sends.
Preferably, the sample generator is a multi-way selecting valve, and the unidirectional selection of described multi-way selecting valve opens and closes the connection of measuring apparatus, distilled water bottle, waste liquid bottle, standard model bottle, bottle for handling liquid toilet or cosmetic substance, salicylate developer bottle, hypochlorous acid developer bottle and sample bottle.
Preferably, described colourimetry ammonia nitrogen online auto monitoring device also is provided with temperature control equipment, and described temperature control equipment is communicated with heating with reaction unit.
Preferably, described temperature control equipment is a thermopair, and described thermopair is arranged in the reaction unit.
Preferably, be provided with the elastic tube in the pump case passage in the described peristaltic pump, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor.
Preferably, described reaction unit is an obturator, and temperature control equipment is arranged in the reaction unit.
Preferably, described colourimetry ammonia nitrogen online auto monitoring device is by data transmission device and tele-control system contact; Described data transmission device comprises telephone network, GSM mobile handset short message net, GPRS or cdma network.
Owing to adopt the rear end to be provided with the measuring apparatus of the peristaltic pump of photoelectrometer buret, overcome the error that peristaltic pump causes owing to a period of time uses or other reason causes instability of flow in the technical solution of the present invention; And adopt peristaltic pump negative pressure suction to carry out collected specimens and reagent, owing between reagent (or sample) and pump line, have the air cushioning district, guarantee the contact of liquid discord pump line, fundamentally stopped the pollution of pump line to liquid, simultaneously also avoid the pump line corrosion, prolonged the life-span of peristaltic pump.
Reaction unit is a closed container in the optimal technical scheme of the present invention, be provided with temperature control equipment and pressure control device at reaction unit, can form High Temperature High Pressure like this and clear up system, accelerate reaction process, overcome the corrosive attack of uncovered system corrosive gas volatilization equipment.Simultaneously, peristaltic pump adopts the teflon transparent hose in the technical solution of the present invention, and caliber is greater than 1.5mm.Reduced particle plugging probability in the water sample.
The salicylic acid colourimetry that is based on the colourimetry ammonia nitrogen online auto monitoring device that the inventor obtains through long-term exploratory development realizes.Operation steps is identical with chemico-analytic principle among the present invention, helps operator's left-hand seat and operation.And, the device that the present invention adopts in strictly observing standard condition and the basis of step on adopt programmable logic controller (PLC) controls application of sample quantity again, and obtain ammonia nitrogen concentration in water sample and the standard model with photoelectric colorimetry, by the automation mechanized operation of instrument, reach the precision higher than prior art.
The colourimetry ammonia nitrogen online auto monitoring device of inventor's design can pass through remote data transmission technology flexible networking, can realize that telephone network, GSM mobile handset short message net, GPRS or the real-time Surveillance center of cdma network to the reverse warning to Surveillance center of Remote, remote measurement and the monitoring point of monitoring point, can realize the technical requirement of on-line monitoring like this.
In addition, adopt multi-way selecting valve in the preferred version of the present invention, passage is versatile and flexible, has abandoned expensive diaphragm electromagnetic valve, greatly reduces maintenance and maintenance cost.
The scope that technical scheme of the present invention is measured can reach 0.1～40.0mg/L, even higher, thereby technical scheme of the present invention can be used for the online auto monitoring of ammonia nitrogen concentrations such as waste water, sewage discharge point source, surface water.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment colourimetry automatic on-line monitoring ammonia nitrogen instrument.
Wherein, 1 is the wriggling volume pump, 2 is the photoelectric colorimetry detecting device, 3 is gauge line, and 4 is photoelectric detector, and 5 is temperature control equipment, 6 is sample bottle, 7 is reaction unit, and 10 is multi-way selecting valve, and 11 is that distilled water bottle, 12 is that hypochlorous acid developer bottle, 13 is that standard model bottle, 14 is that salicylate developer bottle, 15 is waste liquid bottle.
Embodiment
In order to describe the technical solution of the utility model in detail, below describe in detail by specific embodiment:
Embodiment such as Fig. 1, a kind of colourimetry online auto monitoring ammonia nitrogen instrument, what comprise that pipeline successively connects has sample generator 10, a reaction unit 7, between sample generator 10, reaction unit 7, measuring apparatus is set, this measuring apparatus is the peristaltic pump 1 that the rear end is provided with the photoelectrometer buret, be provided with the elastic tube in the pump case passage in the peristaltic pump, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor.This photoelectrometer buret comprises the gauge line 3 of determining volume, the gauge line arranged outside has photoelectric detector 4, photoelectric detector comprises that being in metering emissive source and the metering that the gauge line both sides distribute accepts the source, and metering is accepted the source and accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.At the reaction unit arranged outside detecting device 2 that responds, the reaction detection device comprises and is in the emissive source that the reaction unit both sides distribute and accepts the source that the reaction detection device also links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
At the sample generator is multi-way selecting valve 10, the unidirectional selection of described multi-way selecting valve opens and closes measuring apparatus, sample bottle 6, reaction unit 7, the connection of distilled water bottle 11, hypochlorous acid developer bottle 12, standard model bottle 13, salicylate developer bottle 14, waste liquid bottle 15.
This colourimetry online auto monitoring ammonia nitrogen instrument also is provided with temperature control equipment 5, comprises thermopair, and described thermopair is arranged in the reaction unit, and temperature control equipment is communicated with heating with reaction unit.
After the measurement cyclic process begins, wash each pipeline, gauge line and reaction unit with new water sample, to remove residual chaff interference.Use peristaltic pump that water sample is added reaction unit and clear up, successively add again then in the reagent solution and reaction unit in all ingredients bottle.By the bubbling mixing material, guarantee that water sample and each reagent solution mix fully, heat behind the airtight digestion device, by measuring system control digestion time.Solution is discharged by peristaltic pump in solution cooling back.The result who detects according to the reaction detection device and the result of standard model calculate the ammonia nitrogen concentration in the water body.
Because reagent and sample collecting all use peristaltic pump in measuring, water sample and reagent solution directly with corrosion of peristaltic pump tube contact preventing and chaff interference pollution, adopt the photoelectrometer buret simultaneously, prevent the error of the liquid volume added that causes owing to the peristaltic pump fluctuations in discharge.
Above-mentioned example only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of being done according to the utility model spirit all should be encompassed within the protection domain of the present utility model.
Claims (10)
1, a kind of colourimetry ammonia nitrogen online auto monitoring device, the sample generator, the reaction unit that comprise pipeline connection successively, before described sample generator, measuring apparatus is set respectively, it is characterized in that described measuring apparatus is the peristaltic pump that the rear end is provided with the photoelectrometer buret.
2, colourimetry ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that described photoelectrometer buret comprises the gauge line of determining volume, described gauge line arranged outside has photoelectric detector, and photoelectric detector links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
3, colourimetry ammonia nitrogen online auto monitoring device according to claim 2, it is characterized in that described photoelectric detector comprises that being in metering emissive source and the metering that the gauge line outside distributes accepts the source, metering is accepted the source and is accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.
4, colourimetry ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that the photoelectric colorimetry detecting device being arranged in described reaction unit arranged outside, described photoelectric colorimetry detecting device comprises and is in the emissive source that the reaction unit outside distributes and accepts the source, and the source of acceptance is accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that emissive source sends.
5, colourimetry ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that the sample generator is a multi-way selecting valve, the unidirectional selection of described multi-way selecting valve opens and closes the connection of measuring apparatus, distilled water bottle, waste liquid bottle, standard model bottle, bottle for handling liquid toilet or cosmetic substance, salicylate developer bottle, hypochlorous acid developer bottle and sample bottle.
6, colourimetry ammonia nitrogen online auto monitoring device according to claim 1 is characterized in that described colourimetry ammonia nitrogen online auto monitoring device also is provided with temperature control equipment, and described temperature control equipment is communicated with heating with reaction unit.
7, colourimetry ammonia nitrogen online auto monitoring device according to claim 6 is characterized in that described temperature control equipment is a thermopair, and described thermopair is arranged in the reaction unit.
8, colourimetry ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that being provided with in the described peristaltic pump elastic tube in the pump case passage, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor; Described elastic tube is the teflon transparent hose.
9, colourimetry ammonia nitrogen online auto monitoring device according to claim 1 is characterized in that described reaction unit is an obturator, is provided with temperature control equipment and pressure control device in reaction unit.
10, colourimetry ammonia nitrogen online auto monitoring device according to claim 1 is characterized in that described colourimetry ammonia nitrogen online auto monitoring device is by data transmission device and tele-control system contact; Described data transmission device comprises telephone network, GSM mobile handset short message net, GPRS or cdma network.
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| CN200920141603U CN201392346Y (en) | 2009-01-21 | 2009-01-21 | Colorimetry ammonia nitrogen on-line automatic monitoring device |
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| CN200920141603U CN201392346Y (en) | 2009-01-21 | 2009-01-21 | Colorimetry ammonia nitrogen on-line automatic monitoring device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825641A (en) * | 2010-04-22 | 2010-09-08 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN103376239A (en) * | 2012-04-12 | 2013-10-30 | 株式会社岛津制作所 | Injection pump type ammonia nitrogen analyzer |
| CN103922509A (en) * | 2014-04-28 | 2014-07-16 | 江苏汇环环保科技有限公司 | On-line automatic monitoring instrument |
| CN104330540A (en) * | 2014-10-13 | 2015-02-04 | 绍兴晶朗环保科技有限公司 | Water-quality monitoring system |
| CN105158409A (en) * | 2015-06-23 | 2015-12-16 | 中山欧麦克仪器设备有限公司 | On-line ammonia-nitrogen monitor capable of realizing remote wireless transmission |
| CN108061730A (en) * | 2016-11-09 | 2018-05-22 | 郑州富铭环保科技有限公司 | A kind of organics removal is to on-line determination ammonia nitrogen device and interference method |
| CN108254318A (en) * | 2017-12-29 | 2018-07-06 | 江苏汇环环保科技有限公司 | A kind of anti-interference NH3-N online automatic monitors |
| CN108896497A (en) * | 2018-04-04 | 2018-11-27 | 王惠勇 | Air monitoring device and the exhaust-gas treatment line for being equipped with air monitoring device |
| CN114047183A (en) * | 2021-12-13 | 2022-02-15 | 上海昂林科学仪器股份有限公司 | Full-automatic ammonia nitrogen determination system and determination method thereof |
| CN115486389A (en) * | 2021-06-18 | 2022-12-20 | 艾滴科技股份有限公司 | Intelligent breeding system |
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2009
- 2009-01-21 CN CN200920141603U patent/CN201392346Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825641B (en) * | 2010-04-22 | 2013-03-27 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN101825641A (en) * | 2010-04-22 | 2010-09-08 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN103376239A (en) * | 2012-04-12 | 2013-10-30 | 株式会社岛津制作所 | Injection pump type ammonia nitrogen analyzer |
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| CN105158409A (en) * | 2015-06-23 | 2015-12-16 | 中山欧麦克仪器设备有限公司 | On-line ammonia-nitrogen monitor capable of realizing remote wireless transmission |
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| CN108896497A (en) * | 2018-04-04 | 2018-11-27 | 王惠勇 | Air monitoring device and the exhaust-gas treatment line for being equipped with air monitoring device |
| CN108896497B (en) * | 2018-04-04 | 2023-12-01 | 王惠勇 | Air monitoring device and exhaust gas treatment line provided with same |
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| CN114047183A (en) * | 2021-12-13 | 2022-02-15 | 上海昂林科学仪器股份有限公司 | Full-automatic ammonia nitrogen determination system and determination method thereof |
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