CN107894489A - permanganate index automatic titration system - Google Patents
permanganate index automatic titration system Download PDFInfo
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- CN107894489A CN107894489A CN201711446426.XA CN201711446426A CN107894489A CN 107894489 A CN107894489 A CN 107894489A CN 201711446426 A CN201711446426 A CN 201711446426A CN 107894489 A CN107894489 A CN 107894489A
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- China
- Prior art keywords
- injection pump
- pump machanism
- control module
- piston
- syringe
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- 238000004448 titration Methods 0.000 title claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims abstract description 14
- 229940039790 sodium oxalate Drugs 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 12
- 239000000284 extract Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- OQVYMXCRDHDTTH-UHFFFAOYSA-N 4-(diethoxyphosphorylmethyl)-2-[4-(diethoxyphosphorylmethyl)pyridin-2-yl]pyridine Chemical compound CCOP(=O)(OCC)CC1=CC=NC(C=2N=CC=C(CP(=O)(OCC)OCC)C=2)=C1 OQVYMXCRDHDTTH-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- IPGOVDXOBDFUBM-UHFFFAOYSA-N oxalic acid;sodium Chemical compound [Na].OC(=O)C(O)=O IPGOVDXOBDFUBM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a kind of permanganate index automatic Titration system, including：Host computer；Control module, control module is used for the control instruction for receiving host computer, and for sending control signal to the first injection pump machanism and the second injection pump machanism, the information of voltage that ORP electrodes are tested is additionally operable to receive and handled, is additionally operable to judge titration end-point and upload to titrate to complete signal to upper seat in the plane；First injection pump machanism, the first injection pump machanism are used for the control signal transmitted by receive and control module and add sodium oxalate to sample bottle；Second injection pump machanism, the second injection pump machanism are used for the control signal transmitted by receive and control module and potassium permanganate are added dropwise to sample bottle；ORP electrodes, ORP electrodes are for the information of voltage in test sample bottle and are transferred to control module.The present invention is a kind of dependence for both having reduced and having judged human subjective titration end-point, also not by water sample patterns affect, the permanganate index automatic Titration system of the raising test data degree of accuracy.
Description
Technical field
The present invention relates to the measure field of permanganate index in water, is provided in particular in a kind of both reduced and human subjective is sentenced
The dependence of disconnected titration end-point, also not by water sample patterns affect, the permanganate index automatic drip of the raising test data degree of accuracy
Determine system.
Background technology
Permanganate index refers under certain condition, with potassium permanganate (KMnO4) it is oxidant, disappeared when handling water sample
The amount of the oxidant of consumption.It is expressed as the mg/litre (O of oxygen2, mg/l).Permanganate index at the specified experimental conditions, can only
Partial oxidation Organic substance in water, it is not the yardstick for reflecting total organic content in water body.International Organization for standardization (ISO) suggests high
Potassium manganate method is only limitted to determine surface water, drinking water and source water, is not suitable for industrial wastewater.
Permanganate index test principle be：The potassium permanganate and sulfuric acid of known quantity are added in sample, in boiling water bath
Resolution 30 minutes, potassium permanganate aoxidize some organic matter and inorganic matter reducing substanceses in sample, are added after reaction excessive
The remaining potassium permanganate of oxalic acid sodium reduction, then with the excessive sodium oxalate of potassium permanganate index solution residual titration, by being calculated
Permanganate index in sample.
During the permanganate index of laboratory test at present, operating personnel judge to drip according to the change of color sample
Determine terminal, the experiment qualification to operating personnel requires high.If having abnormal color after water sample muddiness or water sample resolution, even if
The experimenter of skilled operation, the judgement to titration end-point also can be impacted, easily causes test result to have deviation.Therefore need badly
The automatic Titration principle of research energy accurate judgement permanganate index titration end-point, applied to permanganate index automatic Titration system
System.
Therefore, need a kind of dependence for both having reduced human subjective and having judged titration end-point badly, not by water sample patterns affect, improve
The permanganate index automatic Titration system of the test data degree of accuracy.
The content of the invention
It is an object of the invention to provide a kind of dependence for both having reduced human subjective and having judged titration end-point, not by water sample type
Influence, improve the permanganate index automatic Titration system of the test data degree of accuracy.
To achieve these goals, technical scheme provided by the invention is：A kind of permanganate index automatic Titration is provided
System, including：
Host computer；
Control module, the control module are used for the control instruction for receiving the host computer, and for sending control signal
To the first injection pump machanism and the second injection pump machanism, it is additionally operable to receive and handles information of voltage that ORP electrodes test, sentences
Disconnected titration end-point, and upload titration and complete signal to the host computer；
First injection pump machanism, the first injection pump machanism are used to receive the control signal transmitted by the control module
And add sodium oxalate to sample bottle；
Second injection pump machanism, the second injection pump machanism are used to receive the control signal transmitted by the control module
And potassium permanganate is added dropwise to the sample bottle；
ORP electrodes, the ORP electrodes are for the information of voltage in test sample bottle and are transferred to the control module.
The structure of second injection mechanism is identical with the structure of first injection mechanism, wherein first syringe pump
Mechanism includes：Housing, piston pump motor, valve motor, piston load push-pull, syringe, triple valve, the piston motor
And valve motor is respectively arranged at the bottom and top of the housing, the piston motor connects with described piston load push-pull one end
Connect, the syringe and triple valve are located at the outside of the housing, the piston load push-pull other end and the syringe
Piston push rod connects, and the syringe connects with one end of the triple valve, and the second end of the triple valve connects with sodium oxalate,
3rd end of the triple valve connects with sample bottle, and the syringe extracts sodium oxalate and is added drop-wise in sample bottle.
One end that the piston load push-pull is connected with the piston push rod of the syringe is provided with connecting hole, and the connecting hole is also
It is configured with lock-screw.
The triple valve is tightly fixed on by bolt lock in the side wall of the housing.
Be additionally provided with drive circuit board in the housing, the drive circuit board be used to driving the piston motor and
Valve motor.
Compared with prior art, the beneficial effects of the invention are as follows：
Rule of thumb formula V2+ (V1-V2) × f calculates titration and terminates ORP value, and V1, V2 are real-time voltage value, are not required to grow
Time gathers, and simplifies the process for determining that titration terminates ORP value, dynamic control titration end-point, substantially increases terminal point determining
Flexibility.
Correction coefficient is variable, is not a fixed value, the adjusted correction of ORP electrodes of different manufacturers, different model
After coefficient, you can adapt to the titration system, the applicable electrode of the titration system is not limited to certain a special electrodes.
It is not required to calibrate electrode after changing ORP electrodes, correction coefficient need to be only adjusted according to titration situation, i.e.,
Titration end-point accurate judgement can be ensured.
To occurring the water sample of abnormal color after turbid water sample and resolution, endpoint method provided by the invention can accurately be known
Other titration end-point, is not influenceed by sample state.
It will be become more fully apparent by following description and with reference to accompanying drawing, the present invention, these accompanying drawings are used to explain the present invention
Embodiment.
Brief description of the drawings
Fig. 1 is the schematic diagram of permanganate index automatic Titration system.
Fig. 2 is expressed as the schematic diagram of the injection pump machanism of permanganate index automatic Titration system of the present invention.
Embodiment
Embodiments of the invention are described with reference now to accompanying drawing, similar element numbers represent similar element in accompanying drawing.Such as
It is upper described, as illustrated in fig. 1 and 2, permanganate index automatic Titration system provided in an embodiment of the present invention, including：
Host computer 1；
Control module 2, the control module 2 are used for the control instruction for receiving the host computer 1, and for sending control letter
Number pump machanism 4 is injected to the first injection pump machanism 3 and second, be additionally operable to receive and handle the voltage that ORP electrodes 5 test and believe
Breath, judge titration end-point, and upload titration and complete signal to the host computer 1；
First injection pump machanism 3, the first injection pump machanism 3 are used to receive the control transmitted by the control module 2
Signal and to sample bottle 6 add sodium oxalate 7；
Second injection pump machanism 4, the second injection pump machanism 4 are used to receive the control transmitted by the control module 2
Signal and to the sample bottle 6 be added dropwise potassium permanganate 8；
ORP electrodes 5, the ORP electrodes 5 are for the information of voltage in test sample bottle 6 and are transferred to the control module
2。
In embodiment as shown in Figure 2, the structure of second injection mechanism 4 and the structure of first injection mechanism 3
It is identical, wherein the first injection pump machanism 3 includes：Housing 31, piston pump motor 32, valve motor 33, piston load push-pull
34th, syringe 35, triple valve 36, the piston motor 32 and valve motor 33 be respectively arranged at the housing 31 bottom and
Top, the piston motor 32 are connected with described one end of piston load push-pull 34, and the syringe 35 and triple valve 36 are all provided with
In the outside of the housing 31, the other end of piston load push-pull 34 is connected with the piston push rod of the syringe 35, the note
Emitter 35 connects with one end of the triple valve 36, and the second end of the triple valve 36 connects with sodium oxalate 7, the triple valve 36
The 3rd end connected with sample bottle 6, the syringe 35 extracts sodium oxalate 7 and is simultaneously added drop-wise in sample bottle 6.
It should be noted that because the structure of second injection mechanism is identical with the structure of first injection mechanism,
And in the second injection mechanism, one end of triple valve connects with syringe, unlike the first injection mechanism, the second end and Gao Meng
Sour potassium connection, the 3rd end connect with sample bottle, and syringe extracts potassium permanganate and is added drop-wise in sample bottle.
In embodiment as shown in Figure 2, the piston load push-pull 34 be connected with the piston push rod of the syringe 35 one
End is provided with connecting hole, and the connecting hole is also configured with lock-screw 37.
In embodiment as shown in Figure 2, the triple valve 36 is tightly fixed on by bolt lock in the side wall of the housing 31.
In embodiment as shown in Figure 2, drive circuit board 38, the drive circuit board 38 are additionally provided with the housing 31
For driving the piston motor 32 and valve motor 33.
It should be noted that the first injection pump machanism adds how many sodium oxalate every time, it is to be controlled by control module
, specific amount is well known to those skilled in the art and has standard to look into, and the standard for being referred to correlation is operated,
Repeat no more in the present invention.
The first syringe pump and the second syringe pump are introduced, the present invention uses two syringe pumps, and the first syringe pump is used to add
Add sodium oxalate solution, the second syringe pump is used to liquor potassic permanganate be added dropwise.Each syringe pump pump is respectively connected with two valve positions, wherein
First syringe pump and the second syringe pump have a valve position connection reagent bottle, i.e., as shown in figure 1, two pumps connect sodium oxalate respectively
Solution and liquor potassic permanganate, another valve position connection sample bottle of two syringe pumps.
In addition, the particular technique index of syringe pump is as follows in the present embodiment：
1st, the liquid measure degree of accuracy：Error≤1% (during rated travel)；
2nd, liquid measure accuracy：Repeatability error≤0.5% (during rated travel)；
3rd, rated travel (control step number)：60mm (6000 step)；
4th, linear velocity scope：0.05mm/s-50mm/s；
5th, rated travel run time scope：1.2s-1200s；
6th, control resolution：0.01mm (1 step)；
7th, drive mechanism：Ball-screw-transmission；
8th, piston maximum driving force：≥60N；
9th, piston secondary drive power：≥34N；
10th, using specification of syringe：50 μ L, 100 μ L, 250 μ L, 500 μ L, 1mL, 2.5mL, 5mL, 10mL, 25mL (this hair
Bright embodiment uses 10mL syringes)；
11st, valve-type：Standard configuration：3 mouthfuls of 120 ° of valves, it may customize：4 mouthfuls of 90 ° of valves, T-shaped 90 ° of valves, 90 ° of distributing valves；
12nd, the valve transposition time：≤ 280ms (adjacent between two mouthfuls)；
13rd, fluid path material：Borosilicate glass, polytetrafluoroethylene (PTFE), polytrifluorochloroethylene；
14th, fluid path maximum pressure-bearing reference value：0.68Mpa；
15th, pipe interface：1/4 " -28 internal thread interface；
16th, syringe interface：1/4 " -28 internal thread interface；
17th, signal inputs：2 road Transistor-Transistor Logic level signal inputs (driving current ＞ 16mA), after controlling static pause instruction
Restarting；
18th, signal output：3 road OC gate signals outputs, for indicating operating status；
19th, communication interface：RS485/RS232 can be set；
20th, traffic rate：9600bps/38400bps can be set；
21st, device parameter is set：6 DIP toggle switch (communication interface, communication speed etc.)；
22nd, appearance and size (length × width × height)：114×65×254(mm)；
23rd, it is applicable power supply：DC 24V/1.5A；
24th, operating ambient temperature：15 DEG C -40 DEG C (mainly the temperature characterisitic of polytetrafluoroethylmaterial material is determined in by syringe
It is fixed)；
25th, working environment relative humidity：＜ 80%；
26th, weight：2.15kg.
ORP electrodes are introduced, the height of ORP electrodes need to be adjusted according to liquid level in sample bottle, ensure platinum
Ring is soaked in solution.ORP electrodes should be soaked in 3.3M KCl solution when not in use.ORP standards can be used molten during first use
Liquid is corrected to electrode.
ORP electrode particular technique parameters disclosed in the embodiment of the present invention are as follows：
1st, ORP testing ranges：±5000mV；
2 Applicable temperature scopes：0-100℃；
3 electrodes are pressure-resistant：It is up to 50PSI；
4th, effective measurement region of electrode：Platinum ring (99.99%), the L of 0.25 " O.D. × 0.1 "；
5th, reference system：The double salt bridge designs of Ag/AgCl；
6th, with reference to filling liquid：3.3M (KCl) not refilling type (inner presseds)；
7th, liquid connects material：Glass, platinum and ceramics.
It should be noted that the spare and accessory parts such as syringe pump, syringe, triple valve, ORP electrodes disclosed in the embodiment of the present invention
Concrete model or technical parameter, be all a kind of combination in numerous embodiments, the power of the present invention can not be limited with this
The protection domain that profit requires, the spare and accessory parts of other models can also be selected to be combined as needed in practical application, still belong to this
The covered scope of invention.
Claims (5)
- A kind of 1. permanganate index automatic Titration system, it is characterised in that including：Host computer；Control module, the control module are used to receiving the control instruction of the host computer, and for sending control signal to the One injection pump machanism and the second injection pump machanism, it is additionally operable to receive and handles information of voltage, judgement drop that ORP electrodes are tested Determine terminal, and upload titration and complete signal to the host computer；First injection pump machanism, the first injection pump machanism be used to receiving control signal transmitted by the control module and to Sample bottle adds sodium oxalate；Second injection pump machanism, the second injection pump machanism be used to receiving control signal transmitted by the control module and to Potassium permanganate is added dropwise in the sample bottle；ORP electrodes, the ORP electrodes are for the information of voltage in test sample bottle and are transferred to the control module.
- 2. permanganate index automatic Titration system as claimed in claim 1, it is characterised in that second injection mechanism Structure is identical with the structure of first injection mechanism, wherein the first injection pump machanism includes：Housing, piston pump driving electricity Machine, valve motor, piston load push-pull, syringe, triple valve, the piston motor and valve motor are respectively arranged at the housing Bottom and top, the piston motor is connected with described piston load push-pull one end, and the syringe and triple valve are all provided with In the outside of the housing, the piston load push-pull other end is connected with the piston push rod of the syringe, the syringe with One end connection of the triple valve, the second end of the triple valve connect with sodium oxalate, the 3rd end of the triple valve and sample Bottle connection, the syringe extract sodium oxalate and are added drop-wise in sample bottle.
- 3. permanganate index automatic Titration system as claimed in claim 2, it is characterised in that the piston load push-pull and institute The one end for stating the piston push rod connection of syringe is provided with connecting hole, and the connecting hole is also configured with lock-screw.
- 4. permanganate index automatic Titration system as claimed in claim 2, it is characterised in that the triple valve passes through bolt It is locked in the side wall of the housing.
- 5. permanganate index automatic Titration system as claimed in claim 2, it is characterised in that be additionally provided with the housing Drive circuit board, the drive circuit board are used to drive the piston motor and valve motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711446426.XA CN107894489A (en) | 2017-12-27 | 2017-12-27 | permanganate index automatic titration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711446426.XA CN107894489A (en) | 2017-12-27 | 2017-12-27 | permanganate index automatic titration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107894489A true CN107894489A (en) | 2018-04-10 |
Family
ID=61808817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711446426.XA Pending CN107894489A (en) | 2017-12-27 | 2017-12-27 | permanganate index automatic titration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738576A (en) * | 2018-12-31 | 2019-05-10 | 华测检测认证集团股份有限公司 | Multifunctional multichannel automates titration outfit |
| CN112986485A (en) * | 2019-12-16 | 2021-06-18 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Titration apparatus and titration method |
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| CN201159728Y (en) * | 2007-11-12 | 2008-12-03 | 江苏绿叶环保科技仪器有限公司 | Automatic detection instrument for permanganate index |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738576A (en) * | 2018-12-31 | 2019-05-10 | 华测检测认证集团股份有限公司 | Multifunctional multichannel automates titration outfit |
| CN112986485A (en) * | 2019-12-16 | 2021-06-18 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Titration apparatus and titration method |
| CN112986485B (en) * | 2019-12-16 | 2023-08-18 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Titration apparatus and titration method |
| US11885781B2 (en) | 2019-12-16 | 2024-01-30 | Endress+Hauser Conducta Gmbh+Co. Kg | Titration apparatus and titration method |
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Application publication date: 20180410 |
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