CN104914209A - Laboratory COD automatic analysis robot - Google Patents
Laboratory COD automatic analysis robot Download PDFInfo
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- CN104914209A CN104914209A CN201510357039.3A CN201510357039A CN104914209A CN 104914209 A CN104914209 A CN 104914209A CN 201510357039 A CN201510357039 A CN 201510357039A CN 104914209 A CN104914209 A CN 104914209A
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Abstract
The invention discloses a laboratory COD automatic analysis robot. The laboratory COD automatic analysis robot comprises a plurality of digestion pipes which are arranged on a digestion pipe disc and are used for storing a water sample to be detected, an automatic liquid feeding system, a digestion heating system, a cooling system, a titration finishing point judging system and a controller for controlling each system to finish experiment operation steps, wherein the input end of the controller is connected with instruction input equipment; the output end of the controller is connected with the automatic liquid feeding system, the digestion heating system, the cooling system and the titration finishing point judging system respectively; and the output end of the titration finishing point judging system is further connected with display equipment. The laboratory COD automatic analysis robot integrates automatic sample feeding, batch determination and automatic analysis functions; and a potassium dichromate titration method is adopted so that the COD of a water sample can be rapidly determined, and a plurality of samples can be tested simultaneously so that the laboratory COD automatic analysis robot is convenient and rapid and has high accuracy.
Description
Technical field
The present invention relates to field of analytic instrument, particularly relate to the automation equipment of the multiple water sample of a kind of titration mode METHOD FOR CONTINUOUS DETERMINATION.
Background technology
Chemical oxygen demand (COD) (being called for short COD) is one of most important organic contamination overall target in monitoring water environment, it to refer in water body the reducing substances be easily oxidized by strong oxidizer the amount of oxygenant that consumes, result is converted into the amount (in mg/L) of oxygen, is the composite target characterizing reducing substances in water body.Reducing substances in water has various organism, nitrite, sulfide, ferrous salt etc., but importantly organism, therefore chemical oxygen demand (COD) (COD) is often as weighing the how many index of Organic substance in water matter content, and chemical oxygen demand (COD) larger explanation water body is more serious by organic pollution.
The Cleaning Principle of GB11914-89 " the mensuration dichromate titration of water chemical oxygen demand " is: in water sample, add a certain amount of potassium dichromate and catalyst sulfuric acid silver, hot reflux certain hour is added in strong acid media, part potassium dichromate is reduced by the oxidizable substance in water sample, then with the potassium dichromate be not reduced in iron ammonium sulfate Titration Water Sample, the surplus of potassium dichromate in water sample is calculated again according to the consumption of iron ammonium sulfate, the amount of being reduced of potassium dichromate in further acquisition water sample, finally according to the value being reduced gauge calculation water sample COD of potassium dichromate.
The instrument and equipment of current use for laboratory COD content in analysis water-like mainly contains digestion device and titrator, need hand sampling, feed in raw material and send into digestion device, after clearing up, cooling and terminate, put on titrator and test, whole test process is wasted time and energy, and can only test separately, can not under equal conditions detect multiple samples of identical water sample, add manual operation factor, make testing result accuracy lower.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind ofly can carry out the higher COD automatic analysis robot of multiple water sample test, accuracy simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
Laboratory COD automatic analysis robot, comprise and being arranged on digestion tube dish for depositing multiple digestion tubes of water sample to be detected, also comprise the automatic liquid-feeding system for dripping reagent in digestion tube, for the solution in digestion tube is cleared up and heat clear up heating system, for cooling the cooling system of solution in digestion tube, for carrying out titration to the solution in digestion tube and judging that the titration end-point of titration end-point judges system and completes the controller of laboratory operating procedures for controlling each system, the input end link order input equipment of described controller, the output terminal of controller respectively with automatic liquid-feeding system, clear up heating system, cooling system and titration end-point judge that system connects, titration end-point judges that the output terminal of system also connects display device.
Above-mentioned laboratory COD automatic analysis robot, described automatic liquid-feeding system comprises peristaltic pump, holds the reagent barrel of reagent, dropper and mechanical arm, described peristaltic pump, to be communicated with by reagent passage between reagent barrel and dropper, dropper is arranged on a robotic arm, the solenoid valve for controlling dropper dripping quantity and rate of addition is provided with, the output terminal of the controlled end connection control device of solenoid valve in reagent passage between dropper and reagent barrel.
Above-mentioned laboratory COD automatic analysis robot, described mechanical arm comprises upper mechanical arm for controlling to drip reagent operation in cooling system, for mechanical arm in Controlled cooling system motion path and the lower mechanical arm for controlling liquid feeding and titration experiments operation; Described upper mechanical arm is arranged on above cooling system, and upper mechanical arm is provided with X-axis, Y-axis and Z axis; Middle mechanical arm is between upper mechanical arm and lower mechanical arm, and middle mechanical arm is provided with Z axis; Lower mechanical arm is positioned at above digestion tube, and lower mechanical arm is provided with X-axis, Y-axis and Z axis; The output terminal of the controlled end connection control device of described upper mechanical arm, middle mechanical arm and lower mechanical arm.
Above-mentioned laboratory COD automatic analysis robot, the described well heater cleared up heating system and comprise the quantity magnetic stirring apparatus corresponding to digestion tube quantity and be arranged between magnetic stirring apparatus and digestion tube, the stirrer of magnetic stirring apparatus stretches in digestion tube, the output terminal of the controlled end connection control device of magnetic stirring apparatus and well heater.
Above-mentioned laboratory COD automatic analysis robot, described cooling system comprises in digestion process the cooling cylinder that docks with digestion tube and arrange and the first blower fan cooled cooling cylinder and digestion tube respectively and the second blower fan, described cooling cylinder is positioned at digestion tube top, the condenser pipe that quantity is corresponding to digestion tube quantity is provided with in cooling cylinder, first blower fan is arranged on the left of cooling cylinder, and the second blower fan is arranged on digestion tube and faces left side.
Above-mentioned laboratory COD automatic analysis robot, the bottom of described condenser pipe is enclosed with the adapter sleeve and O-ring seal that are tightly connected with digestion tube.
Above-mentioned laboratory COD automatic analysis robot, described titration end-point judges that system comprises the endpoint sensor in-line meter being arranged on straight line module above digestion tube, being arranged on the endpoint sensor in straight line module and being connected with endpoint sensor, described endpoint sensor moves under lower manipulator control, and the output terminal of endpoint sensor in-line meter connects display device.
Owing to have employed above technical scheme, the invention technological progress is as follows.
The present invention integrates automatic sample, batch measures, automatic reading function, and employing dichromate method, can rapid test water sample COD, and can carry out the test of multiple water sample, convenient and swift, accuracy is high simultaneously.Adopt the present invention to carry out the detection of water sample, whole test process only samples needs manual completing, and other processes complete automatically by equipment, dramatically reduce manual operation intensity, shorten the test duration, effectively can save the recruitment number of enterprise, reduction cost of labor, increases work efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of automatic liquid-feeding system of the present invention;
Fig. 3 is the structural representation clearing up heating system of the present invention;
Fig. 4 is the structural representation of cooling system of the present invention;
Fig. 5 is the part-structure schematic diagram of the present embodiment.
Wherein: 1. the first blower fan, the 1 ' second blower fan, 2. cooling cylinder, 3. condenser pipe, 4. endpoint sensor, 5. straight line module, 6. digestion tube dish, 7. digestion tube, 8. well heater, 9. reagent barrel, 10. display device, 11. reagent passage, 12. peristaltic pumps, 13. controllers, 14. magnetic stirring apparatuss, 15. times mechanical arm X-axis, 16. times mechanical arm Y-axis, 17. times mechanical arm Z axis.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
See Fig. 1, a kind of laboratory COD automatic analysis robot, comprise the multiple digestion tubes 7 be arranged on digestion tube dish 6, digestion tube is used for depositing water sample to be detected.In the present embodiment, be provided with 25 digestion tubes in digestion tube dish altogether, can detect 25 water samples, digestion tube can adapt to high/low temperature, can not ftracture during very fast cooling simultaneously.In the present invention, fixing for convenience of cable, pipeline and each parts, can arrange frame, digestion tube dish is fixedly installed on the middle part of frame, as shown in Figure 5.
Frame of the present invention is also provided with automatic liquid-feeding system, clears up heating system, cooling system and titration end-point and judge system, the side of frame is provided with command input device, controller 13 and display device 10, the input end link order input equipment of controller, the output terminal of controller respectively with automatic liquid-feeding system, clear up heating system, cooling system and titration end-point and judge that system is connected, titration end-point judges that the output terminal of system connects display device, controller is also connected with display device, carries out the state display of titration process.Command input device can be mouse, keyboard etc., and display device can be display; Certainly, command input device and display device can replace with a touch display screen.
Automatic liquid-feeding system is used for dripping reagent in digestion tube, its structure as shown in Figure 2, comprise peristaltic pump 12, hold the reagent barrel 9 of reagent, dropper and mechanical arm, peristaltic pump, to be communicated with by reagent passage 11 between reagent barrel and dropper, dropper is arranged on a robotic arm, is provided with solenoid valve, for completing separatory in the reagent passage between dropper and reagent barrel, and control dropper dripping quantity and rate of addition, the output terminal of the controlled end connection control device of solenoid valve.
In the present invention, reagent barrel is provided with six altogether, holds distilled water, the sulfuric acid solution of silver sulfate, high concentration potassium bichromate solution, low concentration potassium bichromate solution, high-concentration sulfuric acid ferrous ammonium solution and low-concentration sulfuric acid ferrous ammonium solution respectively.Peristaltic pump is used for providing mobilization dynamic for reagent in reagent barrel, the corresponding reagent barrel of peristaltic pump is provided with six, six peristaltic pumps are arranged on the right side of frame in two separate ranks, left column controls low-concentration sulfuric acid ferrous ammonium solution, high-concentration sulfuric acid ferrous ammonium solution, distilled water from top to bottom respectively, and right row control the sulfuric acid solution of high concentration potassium bichromate solution, low concentration potassium bichromate solution, silver sulfate from top to bottom respectively.Peristaltic pump completes filling operation under the control of the controller.
Mechanical arm is used for the control completing liquid feeding, cooling and titration running path under the control of the controller, specifically comprises mechanical arm, middle mechanical arm and lower mechanical arm.
Upper mechanical arm is arranged in the frame above cooling system, the running path of dropper during for controlling to drip reagent in cooling system; Upper mechanical arm is provided with X-axis, Y-axis and Z axis, and as shown in Figure 2, upper mechanical arm is by mobile level of control direction in X-axis, Y-axis, and on Z axis, mobile control adjustable height, participates in the operation adding distilled water in condenser pipe.
Middle mechanical arm is arranged on the center rear of frame, for the motion path of Controlled cooling system, and between upper mechanical arm and lower mechanical arm; Middle mechanical arm is provided with Z axis, controls the adjustable height motion of whole cooling cylinder.
Lower mechanical arm is arranged in the frame above digestion tube, the running path of electrode during for controlling dropper running path and the titration of liquid feeding in digestion tube; Lower mechanical arm is provided with X-axis, Y-axis and Z axis, controllable levels and vertical direction, and lower mechanical arm participates in the operation of liquid feeding, titration and determination of electrode.
Clear up heating system for clearing up the solution in digestion tube and heating, its structure as shown in Figure 3, comprises magnetic stirring apparatus 14 and well heater 8, the output terminal of the controlled end connection control device of magnetic stirring apparatus and well heater.Magnetic stirring apparatus is arranged on the bottommost of frame, and the stirrer of magnetic stirring apparatus stretches in digestion tube, for stirring the solution in digestion tube, promotes digestion process.The quantity of magnetic stirring apparatus is corresponding to digestion tube quantity, arranges 25 magnetic stirring apparatuss in the present embodiment altogether.Well heater is arranged between magnetic stirring apparatus and digestion tube, for heating the solution in digestion tube.
Cooling system is for cooling solution in digestion tube, and its structure as shown in Figure 4, comprises cooling cylinder 2, first blower fan 1 and the second blower fan 1 ', the first blower fan is arranged on the left of cooling cylinder, and the second blower fan is arranged on digestion tube and faces left side, and cooling cylinder 2 is positioned at digestion tube 7 top.
Be provided with condenser pipe 3 in cooling cylinder 2, the quantity of condenser pipe is corresponding to digestion tube quantity, is provided with 25 condenser pipes in the present embodiment altogether.The bottom of condenser pipe is enclosed with adapter sleeve and O-ring seal, and adapter sleeve can fix condenser pipe, and adapter sleeve adopts fluororubber to make, and can play damping and adjustment condenser pipe flatness; O-ring seal is positioned at below adapter sleeve, and can to ensure in digestion process between condenser pipe with digestion tube airtight is connected.
The present invention is in digestion process, and cooling cylinder and the digestion tube of cooling system are in mated condition, for cooling solution in digestion tube; First blower fan is positioned on the left of cabinet, docks with cooling cylinder 2, for cooling condensation case; Second blower fan is positioned at digestion tube and faces left side, docks, for cooling digestion tube with the digestion tube in digestion tube dish.
Titration end-point judges that system is used for carrying out titration to the solution in digestion tube, and judges titration end-point.Titration end-point judges that system comprises straight line module 5, endpoint sensor 4 and endpoint sensor in-line meter, straight line module is arranged in the frame above digestion tube, endpoint sensor setting also moves by lower manipulator control in straight line module, and stretches in digestion tube in titration process.The output terminal of endpoint sensor in-line meter connects display device, intuitively shows for test result being transferred on display device.
The course of work of the present invention is as described below.
Hand sample, in digestion tube, selects test mode and start-up connector.Control lower mechanical arm and peristaltic pump, lower mechanical arm and peristaltic pump are coordinated in digestion tube, adds distilled water, potassium bichromate solution and silver sulfate solution.After agitating heating cooling, use l ferrous ammonium sulfate solution titration, titration terminates, and obtains l ferrous ammonium sulfate solution concentration.Carry out testing process afterwards, middle robot movement, docks cooling cylinder with digestion tube, docks simultaneously, dock on the left of digestion tube with the second blower fan on the left of cooling cylinder with the first blower fan, and the stirrer in digestion tube rotates and starts heating.
After having heated, carry out cooling process, blower fan is started working, and goes up robot movement simultaneously, adds distilled water, cooling cylinder is cooled to room temperature from condenser pipe upper end.Then, middle robot movement, makes cooling cylinder be separated with digestion tube.
After having reacted, lower robot movement, makes endpoint sensor be immersed in liquid to be measured, drip l ferrous ammonium sulfate solution, when electrode induction bath voltage sudden change, signal reaches controller, controller sends instruction, and peristaltic pump quits work, and lower mechanical arm promotes endpoint sensor.
Terminate test, endpoint sensor in-line meter exports data automatically, and is shown by display device.
Claims (7)
1. laboratory COD automatic analysis robot, comprise and being arranged on digestion tube dish (6) for depositing multiple digestion tubes (7) of water sample to be detected, it is characterized in that: also comprise the automatic liquid-feeding system for dripping reagent in digestion tube, for the solution in digestion tube is cleared up and heat clear up heating system, for cooling the cooling system of solution in digestion tube, for carrying out titration to the solution in digestion tube and judging that the titration end-point of titration end-point judges system and completes the controller (13) of laboratory operating procedures for controlling each system, the input end link order input equipment of described controller, the output terminal of controller respectively with automatic liquid-feeding system, clear up heating system, cooling system and titration end-point judge that system connects, titration end-point judges that the output terminal of system also connects display device (10).
2. laboratory COD automatic analysis robot according to claim 1, it is characterized in that: described automatic liquid-feeding system comprises peristaltic pump (12), holds the reagent barrel (9) of reagent, dropper and mechanical arm, described peristaltic pump, to be communicated with by reagent passage between reagent barrel and dropper, dropper is arranged on a robotic arm, the solenoid valve for controlling dropper dripping quantity and rate of addition is provided with, the output terminal of the controlled end connection control device of solenoid valve in reagent passage between dropper and reagent barrel.
3. laboratory COD automatic analysis robot according to claim 2, is characterized in that: described mechanical arm comprises upper mechanical arm for controlling to drip reagent operation in cooling system, for mechanical arm in Controlled cooling system motion path and the lower mechanical arm for controlling liquid feeding and titration experiments operation; Described upper mechanical arm is arranged on above cooling system, and upper mechanical arm is provided with X-axis, Y-axis and Z axis; Middle mechanical arm is between upper mechanical arm and lower mechanical arm, and middle mechanical arm is provided with Z axis; Lower mechanical arm is positioned at above digestion tube, and lower mechanical arm is provided with X-axis, Y-axis and Z axis; The output terminal of the controlled end connection control device of described upper mechanical arm, middle mechanical arm and lower mechanical arm.
4. laboratory COD automatic analysis robot according to claim 1, it is characterized in that: described in clear up heating system and comprise the quantity magnetic stirring apparatus corresponding to digestion tube quantity and be arranged on the well heater (8) between magnetic stirring apparatus (14) and digestion tube, the stirrer of magnetic stirring apparatus stretches in digestion tube, the output terminal of the controlled end connection control device of magnetic stirring apparatus and well heater.
5. laboratory COD automatic analysis robot according to claim 1, it is characterized in that: described cooling system comprises in digestion process the cooling cylinder that docks with digestion tube and arrange and the first blower fan (1) cooled cooling cylinder (2) and digestion tube respectively and the second blower fan (1 '), described cooling cylinder is positioned at digestion tube top, the quantity condenser pipe corresponding to digestion tube quantity (3) is provided with in cooling cylinder, first blower fan is arranged on the left of cooling cylinder, and the second blower fan is arranged on digestion tube and faces left side.
6. laboratory COD automatic analysis robot according to claim 5, is characterized in that: the bottom of described condenser pipe is enclosed with the adapter sleeve and O-ring seal that are tightly connected with digestion tube.
7. laboratory COD automatic analysis robot according to claim 1, it is characterized in that: described titration end-point judges that system comprises the endpoint sensor in-line meter being arranged on straight line module (5) above digestion tube, being arranged on the endpoint sensor (4) in straight line module and being connected with endpoint sensor, described endpoint sensor moves under lower manipulator control, and the output terminal of endpoint sensor in-line meter connects display device.
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| CN201510357039.3A CN104914209A (en) | 2015-06-25 | 2015-06-25 | Laboratory COD automatic analysis robot |
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| CN105277555A (en) * | 2015-11-15 | 2016-01-27 | 常州大学 | Worm-drive operation-end-translation sodium hydroxide calibration device in sulfur determinator |
| CN105277557A (en) * | 2015-11-15 | 2016-01-27 | 常州大学 | Worm-drive operation-end-rotation sodium hydroxide calibration device in sulfur determinator |
| CN105388307A (en) * | 2015-10-24 | 2016-03-09 | 常州大学 | Simple methyl orange flow control device |
| CN106290353A (en) * | 2016-08-29 | 2017-01-04 | 海安华达石油仪器有限公司 | A kind of full-automatic COD analyser |
| CN106442907A (en) * | 2016-08-30 | 2017-02-22 | 温州华邦安全封条股份有限公司 | Micro COD on-line detection device |
| CN106771290A (en) * | 2017-02-17 | 2017-05-31 | 辽宁英创科技发展有限公司 | A kind of automatic check analysis system of robot and application method |
| CN107014807A (en) * | 2017-06-14 | 2017-08-04 | 青岛卓建海洋装备科技有限公司 | A kind of sea water COD determines device and method |
| CN107632106A (en) * | 2017-10-24 | 2018-01-26 | 上海北裕分析仪器股份有限公司 | A kind of robot permanganate index analyzer |
| CN108195998A (en) * | 2018-01-22 | 2018-06-22 | 上海仪乐智能仪器有限公司 | A kind of laboratory COD automatically analyzes robot |
| CN109580974A (en) * | 2018-12-31 | 2019-04-05 | 华测检测认证集团股份有限公司 | The multichannel of Rapid replacement automates titration outfit |
| WO2019192664A3 (en) * | 2018-04-04 | 2019-11-21 | Mubarak Sohaib Ali | An apparatus for chemical analysis and separation, and method for using apparatus |
| CN110531096A (en) * | 2019-09-29 | 2019-12-03 | 青岛中特环保仪器有限公司 | Full-automatic water quality COD robot analyzer |
| CN112067835A (en) * | 2020-09-09 | 2020-12-11 | 上海阳泰医疗科技有限公司 | Automatic liquid sample adding device for reagent bottle |
| CN112379040A (en) * | 2021-01-07 | 2021-02-19 | 石家庄凯禄贸易有限公司 | Equipment special for simultaneously carrying out titration assay on multiple test tubes |
| CN113176375A (en) * | 2021-04-29 | 2021-07-27 | 安徽机电职业技术学院 | Special intelligent test system for ferrous oxide determination |
| CN115060919A (en) * | 2022-07-01 | 2022-09-16 | 武汉新烽光电股份有限公司 | Multifunctional water quality COD detection device |
| CN115078744A (en) * | 2022-04-27 | 2022-09-20 | 广州伊创科技股份有限公司 | Control method, system, medium and product of industrial process on-line analyzer |
| CN116449035A (en) * | 2023-05-04 | 2023-07-18 | 南京捷发科技有限公司 | MSCOD analyzer for water sample batch rapid measurement |
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| CN105388307A (en) * | 2015-10-24 | 2016-03-09 | 常州大学 | Simple methyl orange flow control device |
| CN105277555A (en) * | 2015-11-15 | 2016-01-27 | 常州大学 | Worm-drive operation-end-translation sodium hydroxide calibration device in sulfur determinator |
| CN105277557A (en) * | 2015-11-15 | 2016-01-27 | 常州大学 | Worm-drive operation-end-rotation sodium hydroxide calibration device in sulfur determinator |
| CN106290353A (en) * | 2016-08-29 | 2017-01-04 | 海安华达石油仪器有限公司 | A kind of full-automatic COD analyser |
| CN106442907A (en) * | 2016-08-30 | 2017-02-22 | 温州华邦安全封条股份有限公司 | Micro COD on-line detection device |
| CN106771290A (en) * | 2017-02-17 | 2017-05-31 | 辽宁英创科技发展有限公司 | A kind of automatic check analysis system of robot and application method |
| CN107014807A (en) * | 2017-06-14 | 2017-08-04 | 青岛卓建海洋装备科技有限公司 | A kind of sea water COD determines device and method |
| CN107632106A (en) * | 2017-10-24 | 2018-01-26 | 上海北裕分析仪器股份有限公司 | A kind of robot permanganate index analyzer |
| CN108195998A (en) * | 2018-01-22 | 2018-06-22 | 上海仪乐智能仪器有限公司 | A kind of laboratory COD automatically analyzes robot |
| WO2019192664A3 (en) * | 2018-04-04 | 2019-11-21 | Mubarak Sohaib Ali | An apparatus for chemical analysis and separation, and method for using apparatus |
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| CN110531096A (en) * | 2019-09-29 | 2019-12-03 | 青岛中特环保仪器有限公司 | Full-automatic water quality COD robot analyzer |
| CN110531096B (en) * | 2019-09-29 | 2024-01-26 | 青岛中特环保仪器有限公司 | Full-automatic water quality COD robot analyzer |
| CN112067835A (en) * | 2020-09-09 | 2020-12-11 | 上海阳泰医疗科技有限公司 | Automatic liquid sample adding device for reagent bottle |
| CN112067835B (en) * | 2020-09-09 | 2023-09-15 | 上海阳泰医疗科技有限公司 | Automatic liquid sample adding device for reagent bottle |
| CN112379040B (en) * | 2021-01-07 | 2022-10-04 | 广州达安生物科技有限公司 | Equipment special for simultaneously carrying out titration assay on multiple test tubes |
| CN112379040A (en) * | 2021-01-07 | 2021-02-19 | 石家庄凯禄贸易有限公司 | Equipment special for simultaneously carrying out titration assay on multiple test tubes |
| CN113176375A (en) * | 2021-04-29 | 2021-07-27 | 安徽机电职业技术学院 | Special intelligent test system for ferrous oxide determination |
| CN115078744A (en) * | 2022-04-27 | 2022-09-20 | 广州伊创科技股份有限公司 | Control method, system, medium and product of industrial process on-line analyzer |
| CN115078744B (en) * | 2022-04-27 | 2024-02-13 | 广州伊创科技股份有限公司 | Control method, system, medium and product of industrial process online analyzer |
| CN115060919A (en) * | 2022-07-01 | 2022-09-16 | 武汉新烽光电股份有限公司 | Multifunctional water quality COD detection device |
| CN115060919B (en) * | 2022-07-01 | 2023-03-03 | 武汉新烽光电股份有限公司 | Multifunctional water quality COD detection device |
| CN116449035A (en) * | 2023-05-04 | 2023-07-18 | 南京捷发科技有限公司 | MSCOD analyzer for water sample batch rapid measurement |
| CN116449035B (en) * | 2023-05-04 | 2024-04-19 | 南京捷发科技有限公司 | MSCOD analyzer for quick batch measurement of water samples |
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