CN203941145U - Nitrite online testing device - Google Patents
Nitrite online testing device Download PDFInfo
- Publication number
- CN203941145U CN203941145U CN201420232574.7U CN201420232574U CN203941145U CN 203941145 U CN203941145 U CN 203941145U CN 201420232574 U CN201420232574 U CN 201420232574U CN 203941145 U CN203941145 U CN 203941145U
- Authority
- CN
- China
- Prior art keywords
- valve
- nitrite
- peristaltic pump
- catalyst inlet
- bottle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 84
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000010521 absorption reaction Methods 0.000 claims abstract description 39
- 230000002572 peristaltic effect Effects 0.000 claims description 46
- 239000003054 catalyst Substances 0.000 claims description 36
- 230000008676 import Effects 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 12
- 238000004821 distillation Methods 0.000 claims description 12
- 239000012153 distilled water Substances 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 10
- 239000006096 absorbing agent Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 238000004448 titration Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 7
- 150000002500 ions Chemical class 0.000 abstract description 7
- 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 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 239000012954 diazonium Substances 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-O diazynium Chemical compound [NH+]#N IJGRMHOSHXDMSA-UHFFFAOYSA-O 0.000 abstract description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002798 spectrophotometry method Methods 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 238000005375 photometry Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000002452 interceptive effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- -1 nitrite anions Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical class ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model has solved the test of prior art Nitrite and has existed anti-interference poor, not environmental protection of test agent, test loaded down with trivial details, cost is high the problem such as cannot promote, the utility model adopts the exclusive catalyzer of feature, water body Nitrite is changed into nitrogen dioxide gas by selectivity, carries out titrimetry after efficient absorption again.Diazonium coupling spectrophotometric method relatively, it has got rid of interfering ion to greatest extent, the interference of high turbidity and high chroma; On the other hand, the method and application of installation are in the in-line analyzer of nitrite, without carrying out the proving operation that photometry is loaded down with trivial details.Therefore, adopt the method and apparatus in the utility model, can realize the accurate on-line determination of Complex water body nitrite, there is reagent environmental protection simultaneously, easy to operate, the aspect advantages such as cost.
Description
Technical field
The utility model relates to a kind of online testing device of water analysis, relates in particular to a kind of nitrite online testing device.
Background technology
According to relevant national standard and literature search, the standard determination method of water Nitrite adopts diazonium coupling spectrophotometric method conventionally, the chromatography of ions and gas molecule in space absorption process.For diazonium coupling spectrophotometric method, its required reagent and chromogenic reaction less stable, reagent itself is all the carcinogen that toxicity is larger.In addition, test process disturbing factor is more, as three chloramines in water produce red interference; Iron, plumbous plasma produce precipitation and cause interference; Copper ion plays catalytic action can decompose diazo salt; High turbidity and colourity are also important interference factors.Other photometry based on colour developing principle also faces same problem.Although the chromatography of ions can be measured the content of several negative ion simultaneously, its pre-service is loaded down with trivial details, and operating cost is high, is difficult to accomplish on-line testing.Gas molecule in space absorption process is easy fast, disturbs lessly, but gas phase molecular absorption spectrometer is expensive, is difficult to popularize in basic unit.Also have the potassium permanganate of employing directly to carry out the on-line equipment of endpoint titration, but in water, other reductibility ion can produce very large interference.
Utility model content
The utility model discloses a kind of nitrite online testing device, exist anti-interference poor in order to solve prior art Nitrite test, not environmental protection of test agent, tests loaded down with trivial detailsly, and cost is high the problem such as cannot promote.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A kind of nitrite online testing device, wherein, comprising:
One reaction bulb, described reaction bulb has a water sample import, a catalyst inlet, a carrier gas port;
One absorption bottle, described absorption bottle is communicated with described reaction bulb; Described absorption bottle has an absorbing agent import;
One test bottle, described absorption bottle is communicated with described test bottle; In described test bottle, there is a titrant import; In described test bottle, also there is a sensor;
One titrator, described titrator has an interface unit, and described sensor is connected with described interface unit.
Nitrite online testing device as above, wherein, is provided with one first peristaltic pump between described water sample import and described reaction bulb; Between described catalyst inlet and described reaction bulb, be provided with one second peristaltic pump; Between described carrier gas port and described reaction bulb, be provided with one first and pinch only valve, between described absorbing agent import and described absorption bottle, there is one the 3rd peristaltic pump; Between described absorption bottle and described test bottle, be provided with one second and pinch only valve; Between described titrant import and described test bottle, be provided with one the 4th peristaltic pump.
Nitrite online testing device as above, wherein, described interface unit is pinched only valve, described second and is pinched only valve, described the first peristaltic pump, described the second peristaltic pump, described the 3rd peristaltic pump, described the 4th peristaltic pump and be connected with described first respectively.
Nitrite online testing device as above, wherein, also comprise a distilled water import, described distilled water import is connected with respectively the first distillation water pipe and after-fractionating water pipe, described the first distillation water pipe is communicated with described absorption bottle, and described after-fractionating water pipe is communicated with described test bottle.
Nitrite online testing device as above, wherein, has one the 5th peristaltic pump between the first distillation water pipe and described after-fractionating water pipe described in described distilled water import; Described the first distillation water pipe is provided with one the 3rd and pinches only valve, and described after-fractionating water pipe is provided with one the 4th and pinches only valve; Described the 5th peristaltic pump, the described the 3rd is pinched only valve, the described the 4th and is pinched only valve and be connected with described interface unit respectively.
Nitrite online testing device as above, wherein, one end of a catalyst inlet pipe is described catalyst inlet, the other end of described catalyst inlet pipe is communicated with one first catalyst inlet, one second catalyst inlet respectively; Described the second peristaltic pump is installed on described catalyst inlet pipe; Between described the first catalyst inlet and described catalyst inlet pipe, have one the 5th and pinch only valve, between described the second catalyst inlet and described catalyst inlet pipe, have one the 6th and pinch only valve; Described the second peristaltic pump, the described the 5th is pinched only valve, the described the 6th and is pinched only valve and be connected with described interface unit respectively.
Nitrite online testing device as above, wherein, described reaction bulb has one first lower discharging tube, is provided with one the 7th and pinches only valve on described the first lower discharging tube; Described test bottle has one second lower discharging tube, is provided with one the 8th and pinches only valve on described the second lower discharging tube; The described the 7th pinches only valve and the described the 8th pinches and stops valve and be connected with described interface unit respectively.
Nitrite online testing device as above, wherein, is provided with a stirring apparatus in described test bottle.
In sum, owing to having adopted technique scheme, the utility model has solved the test of prior art Nitrite and has existed anti-interference poor, not environmental protection of test agent, test loaded down with trivial detailsly, cost is high the problem such as cannot promote, and the utility model adopts the exclusive catalyzer of feature, water body Nitrite is changed into nitrogen dioxide gas by selectivity, carries out titrimetry after efficient absorption again.Diazonium coupling spectrophotometric method relatively, it has got rid of interfering ion to greatest extent, the interference of high turbidity and high chroma; On the other hand, the method and application of installation are in the in-line analyzer of nitrite, without carrying out the proving operation that photometry is loaded down with trivial details.Therefore, adopt the method and apparatus in the utility model, can realize the accurate on-line determination of Complex water body nitrite, there is reagent environmental protection simultaneously, easy to operate, the aspect advantages such as cost.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model nitrite online testing device;
Fig. 2 is the concrete implementation data figure of the utility model nitrite online testing device.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further:
Fig. 1 is the structural representation of the utility model nitrite online testing device, refers to Fig. 1, and a kind of nitrite online testing device, wherein, comprising:
One reaction bulb 1, reaction bulb 1 has a water sample import 14, a catalyst inlet 11, a carrier gas port 15;
One absorption bottle 2, absorption bottle 2 is communicated with reaction bulb 1; Absorption bottle 2 has an absorbing agent import 22;
One test bottle 3, absorption bottle 2 is communicated with test bottle 3; In test bottle 3, there is a titrant import 31; In test bottle 3, also there is a sensor 33;
One titrator 4, titrator 4 has an interface unit 41, and sensor 33 is connected with interface unit 41.
Between water sample import 14 of the present utility model and reaction bulb 1, be provided with one first peristaltic pump 61; Between catalyst inlet 11 and reaction bulb 1, be provided with one second peristaltic pump 62; Between carrier gas port 15 and test bottle 3, be provided with one first and pinch only valve 71, between absorbing agent import 22 and absorption bottle 2, there is one the 3rd peristaltic pump 63; Between absorption bottle 2 and test bottle 3, be provided with one second and pinch only valve 72; Between titrant import 31 and test bottle 3, be provided with one the 4th peristaltic pump 64.
Interface unit 41 of the present utility model is pinched only valve 71, second and is pinched only valve 72, the first peristaltic pump 61, the second peristaltic pump 62, the 3rd peristaltic pump 63, the 4th peristaltic pump 64 and be connected with first respectively.
The utility model also comprises a distilled water import 5, and distilled water import 5 is connected with respectively the first distillation water pipe and after-fractionating water pipe, and the first distillation water pipe is communicated with absorption bottle 2, and after-fractionating water pipe is communicated with test bottle 3.
Between distilled water import 5 first distillation water pipes of the present utility model and after-fractionating water pipe, there is one the 5th peristaltic pump 65; The first distillation water pipe is provided with one the 3rd and pinches only valve 73, and after-fractionating water pipe is provided with one the 4th and pinches only valve 74; The 5th peristaltic pump 65, the 3rd is only pinched valve 73, the 4th and is pinched only valve 74 and be connected with interface unit 41 respectively.
One end of a catalyst inlet pipe of the present utility model is catalyst inlet 11, and the other end of catalyst inlet pipe is communicated with one first catalyst inlet 12, one second catalyst inlet 13 respectively; The second peristaltic pump 62 is installed on catalyst inlet pipe; Between the first catalyst inlet 12 and catalyst inlet pipe, having one the 5th pinches and only between valve 75, the second catalyst inlets 13 and catalyst inlet pipe, has one the 6th and pinch only valve 76; The second peristaltic pump, the 5th is pinched only valve 75, the 6th and is pinched only valve 76 and be connected with interface unit 41 respectively.
Reaction bulb 1 of the present utility model has one first lower discharging tube, is provided with one the 7th and pinches only valve 77 on the first lower discharging tube; Test bottle 3 has one second lower discharging tube, is provided with one the 8th and pinches only valve 78 on the second lower discharging tube; The 7th pinches only valve 77 and the 8th pinches and stops valve 78 and be connected with interface unit 41 respectively.
In test bottle 3 of the present utility model, a stirring apparatus is installed.
In an embodiment of the present utility model, the concrete method of operation of device of the present utility model is:
In zero moment: all peristaltic pumps all stop, all only valves of pinching all disconnect.
The sample introduction stage: the first peristaltic pump 61 moves the 9th and pinches only valve 79 and be communicated with, and water sample enters reaction bulb 1, until water sample is closed after overflowing, the 9th only effect of valve 79 of pinching is inflows of controlling in reaction bulb 1.
The stage of reaction: the second peristaltic pump 62 moves, the 5th pinches after only valve 75 is communicated with the several seconds and disconnects, and the 6th pinches only valve 76 and is communicated with simultaneously, after the several seconds, disconnects, and respectively two kinds of catalyzer is entered to test bottle 3.
Absorption stage: the 3rd peristaltic pump 63 moves, pump into appropriate absorbing agent and stop to absorption bottle 2; First pinches only valve 71 is communicated with, and carrier gas purges nitrogen dioxide and enters absorption bottle 2.
Test phase: after absorption bottle 2 fully absorbs, first pinches only valve 71 disconnects; Second pinches only valve 72 is communicated with, and the absorption liquid in absorption bottle 2 moves from flowing to test bottle 3, the five peristaltic pumps 65, and the 3rd pinches only valve 73 is communicated with, and distilled water flow to test bottle 3 certainly after absorption bottle 2 is rinsed.The 5th peristaltic pump 65 stops, and the 3rd pinches only valve 73 disconnects reset.The 4th peristaltic pump 64 moves, and titrant enters test bottle 3 and carries out automatic titration, and after finishing, the 4th peristaltic pump 64 stops.
Wash phase: the 5th peristaltic pump operation, the 4th only pinches valve 74, the 8th pinches only valve 78 and be communicated with, distilled water flushing test bottle 3.After finishing, the 5th peristaltic pump, the 4th is pinched only valve 74, the 8th and is pinched only valve 78 and reset.
The invention also discloses a kind of nitrite on-line testing method, wherein, comprising: water sample is imported in a reaction bulb 1; In reaction bulb 1, import successively the first catalyzer, the second catalyzer; At the interior importing absorbing agent of absorption bottle 2; By carrier gas, the gas of reaction bulb 1 interior generation is imported to absorption bottle 2; The liquid that completes absorption is imported to test bottle 3, at the interior importing titrant of test bottle 3, carry out titrimetry by sensor 33.
Method of the present utility model relates to a kind of catalyzer, carrier gas, absorption liquid and titrant and quantitative relation each other.In acid medium of the present utility model, water body Nitrite is under catalytic action, and fast decoupled also discharges nitrogen dioxide, under carrier gas effect through absorbent solution A absorb after, adopt solution B to carry out titrimetry, can obtain water-outlet body Nitrite content according to the consumption of solution B
The utility model completes after titrimetry, and test bottle 3 is discharged test liquid, at the interior importing distilled water of test bottle 3, test bottle 3 is rinsed afterwards.
Fig. 2 is the concrete implementation data figure of the utility model nitrite online testing device, refers to Fig. 2, adopts the utility model method and apparatus, prepares respectively several standard solution and tests.Result data is as follows:
| Preparation nitrite anions concentration mg/L | Theoretical nitrite anions quality mg | Reactive absorption 10mi nitrite anions test result mean value mg |
| 33.50 | 2.68 | 2.30 |
| 60.00 | 4.80 | 4.51 |
| 126.00 | 10.09 | 9.25 |
| 248.00 | 19.83 | 18.86 |
In sum, owing to having adopted technique scheme, the utility model has solved the test of prior art Nitrite and has existed anti-interference poor, not environmental protection of test agent, test loaded down with trivial detailsly, cost is high the problem such as cannot promote, and the utility model adopts the exclusive catalyzer of feature, water body Nitrite is changed into nitrogen dioxide gas by selectivity, carries out titrimetry after efficient absorption again.Diazonium coupling spectrophotometric method relatively, it has got rid of interfering ion to greatest extent, the interference of high turbidity and high chroma; On the other hand, the method and application of installation are in the in-line analyzer of nitrite, without carrying out the proving operation that photometry is loaded down with trivial details.Therefore, adopt the method and apparatus in the utility model, can realize the accurate on-line determination of Complex water body nitrite, there is reagent environmental protection simultaneously, easy to operate, the aspect advantages such as cost.
Claims (8)
1. a nitrite online testing device, is characterized in that, comprising:
One reaction bulb, described reaction bulb has a water sample import, a catalyst inlet, a carrier gas port;
One absorption bottle, described absorption bottle is communicated with described reaction bulb; Described absorption bottle has an absorbing agent import;
One test bottle, described absorption bottle is communicated with described test bottle; In described test bottle, there is a titrant import; In described test bottle, also there is a sensor;
One titrator, described titrator has an interface unit, and described sensor is connected with described interface unit.
2. nitrite online testing device according to claim 1, is characterized in that, is provided with one first peristaltic pump between described water sample import and described reaction bulb; Between described catalyst inlet and described reaction bulb, be provided with one second peristaltic pump; Between described carrier gas port and described test bottle, be provided with one first and pinch only valve, between described absorbing agent import and described absorption bottle, there is one the 3rd peristaltic pump; Between described absorption bottle and described test bottle, be provided with one second and pinch only valve; Between described titrant import and described test bottle, be provided with one the 4th peristaltic pump.
3. nitrite online testing device according to claim 2, it is characterized in that, described interface unit is pinched only valve, described second and is pinched only valve, described the first peristaltic pump, described the second peristaltic pump, described the 3rd peristaltic pump, described the 4th peristaltic pump and be connected with described first respectively.
4. nitrite online testing device according to claim 1, it is characterized in that, also comprise a distilled water import, described distilled water import is connected with respectively the first distillation water pipe and after-fractionating water pipe, described the first distillation water pipe is communicated with described absorption bottle, and described after-fractionating water pipe is communicated with described test bottle.
5. nitrite online testing device according to claim 4, is characterized in that, has one the 5th peristaltic pump described in described distilled water import between the first distillation water pipe and described after-fractionating water pipe; Described the first distillation water pipe is provided with one the 3rd and pinches only valve, and described after-fractionating water pipe is provided with one the 4th and pinches only valve; Described the 5th peristaltic pump, the described the 3rd is pinched only valve, the described the 4th and is pinched only valve and be connected with described interface unit respectively.
6. nitrite online testing device according to claim 2, is characterized in that, one end of a catalyst inlet pipe is described catalyst inlet, and the other end of described catalyst inlet pipe is communicated with one first catalyst inlet, one second catalyst inlet respectively; Described the second peristaltic pump is installed on described catalyst inlet pipe; Between described the first catalyst inlet and described catalyst inlet pipe, have one the 5th and pinch only valve, between described the second catalyst inlet and described catalyst inlet pipe, have one the 6th and pinch only valve; Described the second peristaltic pump, the described the 5th is pinched only valve, the described the 6th and is pinched only valve and be connected with described interface unit respectively.
7. nitrite online testing device according to claim 1, is characterized in that, described reaction bulb has one first lower discharging tube, is provided with one the 7th and pinches only valve on described the first lower discharging tube; Described test bottle has one second lower discharging tube, is provided with one the 8th and pinches only valve on described the second lower discharging tube; The described the 7th pinches only valve and the described the 8th pinches and stops valve and be connected with described interface unit respectively.
8. nitrite online testing device according to claim 1, is characterized in that, a stirring apparatus is installed in described test bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232574.7U CN203941145U (en) | 2014-05-08 | 2014-05-08 | Nitrite online testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232574.7U CN203941145U (en) | 2014-05-08 | 2014-05-08 | Nitrite online testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203941145U true CN203941145U (en) | 2014-11-12 |
Family
ID=51860449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420232574.7U Expired - Lifetime CN203941145U (en) | 2014-05-08 | 2014-05-08 | Nitrite online testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203941145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092943A (en) * | 2016-06-02 | 2016-11-09 | 上海北裕分析仪器股份有限公司 | A kind of method using gas-phase molecular absorption spectrometry method to carry out COD test |
-
2014
- 2014-05-08 CN CN201420232574.7U patent/CN203941145U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092943A (en) * | 2016-06-02 | 2016-11-09 | 上海北裕分析仪器股份有限公司 | A kind of method using gas-phase molecular absorption spectrometry method to carry out COD test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101655501B (en) | Online automatic monitoring system of total nitrogen and total phosphorus in seawater and monitoring method thereof | |
| Lemos et al. | Amberlite XAD-2 functionalized with 2-aminothiophenol as a new sorbent for on-line preconcentration of cadmium and copper | |
| CN203688493U (en) | On-line multi-parameter heavy metal analyzer | |
| CN106596439B (en) | Equipment and method for simultaneously measuring nitrous acid, ozone and nitrogen dioxide in air | |
| CN101074924A (en) | Method for fastly analyzing chemical oxygen demand by high-pressure flowing injection | |
| CN102980858B (en) | Small-size sequential injection nitride analysis system | |
| CN102980860A (en) | Full-automatic quick measurement system and method for water quality hexavalent chromium | |
| CN203941145U (en) | Nitrite online testing device | |
| CN202903673U (en) | Full-automatic quick water quality measuring system with hexavalent chromium | |
| CN111239304A (en) | System for preparing reference oil sample of dissolved gas component content in insulating oil | |
| CN201210146Y (en) | Water quality on-line monitoring system | |
| CN103308515A (en) | Online analysis system and method for detection of CO gas at ammonia synthesis inlet | |
| CN102253232A (en) | Automatic analyzer and analysis method for water soluble total phosphorus | |
| CN101509904A (en) | Low-voltage ion chromatography for simultaneously analyzing silicates and phosphate in water sample | |
| CN202024965U (en) | Real-time on-line detecting device for concentration of nitrate ions in seawater | |
| CN211825873U (en) | System for preparing reference oil sample of dissolved gas component content in insulating oil | |
| CN105092774A (en) | Nitrite online testing device and testing method | |
| CN202903672U (en) | Small-scale analytical system for sequential injection of nitrite | |
| CN214585054U (en) | Quantitative analysis device for trace urea | |
| CN104569457B (en) | The automatic analysis method of trace nickelous in water sample | |
| CN103323500A (en) | Organic wastewater rapid automatic detecting instrument and detection method | |
| CN210269598U (en) | Chemical analysis system for total nitrogen | |
| CN101782523B (en) | Method for online detecting arsenic content in water by using dithioantipyrine methane as color developing agent | |
| CN104986745A (en) | Gaseous nitrous acid generating device and technology thereof | |
| CN109813581B (en) | Movable semi-automatic sampling vehicle for ammonia escape by chemical method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141112 |