CN113899708A - Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation - Google Patents
Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation Download PDFInfo
- Publication number
- CN113899708A CN113899708A CN202010648022.4A CN202010648022A CN113899708A CN 113899708 A CN113899708 A CN 113899708A CN 202010648022 A CN202010648022 A CN 202010648022A CN 113899708 A CN113899708 A CN 113899708A
- Authority
- CN
- China
- Prior art keywords
- peristaltic pump
- full
- formaldehyde
- liquid
- circulation
- 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.)
- Pending
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 239000007788 liquid Substances 0.000 title claims abstract description 52
- 230000002572 peristaltic effect Effects 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000012153 distilled water Substances 0.000 claims abstract description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 10
- 239000012085 test solution Substances 0.000 claims abstract description 5
- 239000008358 core component Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 15
- 239000012482 calibration solution Substances 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 2
- 230000026676 system process Effects 0.000 abstract description 3
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008098 formaldehyde solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Automation & Control Theory (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention discloses a full-automatic intelligent formaldehyde detector for realizing liquid flow based on a peristaltic pump, which needs the following materials and instruments: distilled water, test solution, reagent, a peristaltic pump, a pipette, five containers, a water bath, a test tube, a spectrophotometer and a programmable logic controller. Liquid (distilled water, reagent and mixed liquid) circulation system with 20 peristaltic pumps as core components is installed in an intelligent detector box in a combined mode, and therefore automatic circulation of the small amount of liquid according to the national standard of formaldehyde detection is achieved. Based on the linear relation between the flow of the peristaltic pump and the working time, the circulation of micro-flow is automatically controlled by controlling the on-off time of the peristaltic pump. This makes formaldehyde intellectual detection system process can carry out automatically, need not artifical intervention, has greatly reduced artifical operating time, has improved the stability of testing result.
Description
Technical Field
The invention belongs to the technical field of formaldehyde detection, and particularly relates to a full-automatic intelligent formaldehyde detector for realizing liquid flow based on a peristaltic pump.
Background
The artificial board is widely applied in modern building and decoration industries, and the environmental pollution caused by the artificial board, especially released formaldehyde gas, has great influence on human health, so that the detection of the formaldehyde content and the volatilization process of the artificial board become one of important indexes for detecting the quality of the artificial board, the climate box method is the most common method for detecting the formaldehyde content and the volatilization process of the artificial board at present, the method needs to place an artificial board product sample in a climate box and detect the content and the speed of the formaldehyde volatilized in the climate box, and a plurality of steps in the formaldehyde detection process need to transfer a plurality of milliliters (10-25 ml) of liquid (mixed liquid, reagent and distilled water) from one container to another container, and the processes are finished by manual operation and using a liquid meter, a pipette or a burette.
However, the climatic chamber method requires a complicated manual operation process in the detection process, the detection period is as long as 10-28 days according to the current national standard, the precision of liquid transfer in the manual operation process is not easy to master, the measurement result is unstable, and the manual operation consumes a long time. Therefore need improve the structure that formaldehyde detected, propose simultaneously based on using the peristaltic pump to realize the full-automatic formaldehyde intelligent detector of liquid measure circulation, the problem that the solution of being convenient for better provided.
Disclosure of Invention
The invention aims to: in order to solve the problem that above-mentioned proposes, provide and realize the full-automatic formaldehyde intelligent detector of liquid measure circulation based on using the peristaltic pump.
The technical scheme adopted by the invention is as follows:
based on use the full-automatic formaldehyde intelligent detector that the peristaltic pump realized the liquid measure circulation, based on use the full-automatic formaldehyde intelligent detector that the peristaltic pump realized the liquid measure circulation to need to use following material and apparatus: distilled water, test solution, reagent, peristaltic pump, pipette, five containers, a water bath, test tube, a spectrophotometer and programmable logic controller, based on use the peristaltic pump to realize the full-automatic formaldehyde intelligent detector's of liquid measure circulation basic work flow does:
s1, controlling the flow direction of the peristaltic pump by connecting a computer with a Programmable Logic Controller (PLC), circulating distilled water, test solution, reagent and other liquids according to national standards, and testing the light transmittance of the mixed solution by passing the mixed solution through a spectrophotometer at the final stage. And calculating the formaldehyde content of the sample. The whole process is full-automatic, and manual intervention is not needed.
S2, designing a test program of a standard curve according to the national standard by the instrument. The computer is connected with a programmable logic controller PLC to control the flow direction of the peristaltic pump, calibration solution is prepared according to the following proportion (0%, 5%, 10%, 20%, 50% and 100%), and the calibration solution with various proportions passes through a spectrophotometer to test the light transmittance of the calibration solution. Thereby calculating the slope of the standard curve.
S3, system software records all data generated during the experiment, including sample test data and standard curve test data. The system software can analyze, calculate, plot and print results reports on all test data.
In a preferred embodiment, the fully automatic formaldehyde intelligent detector based on liquid flow by using a peristaltic pump mainly comprises a liquid flow system, an electronic control system, system software and a spectrophotometer.
In a preferred embodiment, a liquid (distilled water, reagent and mixed liquid) flowing system with 20 peristaltic pumps as core components is installed in the box body of the full-automatic intelligent formaldehyde detector based on liquid flow realization by using the peristaltic pumps.
In a preferred embodiment, an electronic control system taking a PLC as a core is installed in the box body of the full-automatic intelligent formaldehyde detector based on the peristaltic pump for realizing liquid flow, and the flow direction and time of all 20 peristaltic pumps are controlled.
In a preferred embodiment, system software which is operation and control software of the whole detector is installed in a touch screen computer above a box body of the full-automatic intelligent formaldehyde detector for realizing liquid flow by using a peristaltic pump, and an operator sends an instruction to check the detection process at any time, analyzes the detection result after the detection is finished and prints a detection report.
In a preferred embodiment, the spectrophotometer is purchased from the marketplace. The light transmittance of the monochromatic light in the mixed liquid is measured and compared by using the device, so that the content of formaldehyde in the mixed liquid is calculated. And deducing the formaldehyde content of the tested sample from the standard curve.
In conclusion, due to the adoption of the technical scheme, the device has the advantages that the complex operation is simplified, the steps are reduced, the simplicity and convenience of the device are greatly improved, and meanwhile, the device can automatically control the circulation of small flow. This makes formaldehyde intellectual detection system process can carry out automatically, need not artifical intervention, has reduced operating time, has improved the stability of result.
1. In the invention, a liquid (distilled water, reagent and mixed liquid) circulation system taking 20 peristaltic pumps as core components is combined and installed in an intelligent detector box, so that the peristaltic pumps can realize an automatic device for realizing the circulation of a small amount of liquid. Based on the linear relation between the flow of the peristaltic pump and the working time, the circulation of micro-flow is automatically controlled by controlling the on-off time of the peristaltic pump. This makes formaldehyde intellectual detection system process can carry out automatically, need not artifical intervention, has reduced artifical operating time, has improved the stability of testing result.
2. In the invention, an electronic control system taking PLC as a core is arranged in an intelligent detector box body to control the flowing direction and time (the time control precision is 5 milliseconds) of all 20 peristaltic pump liquids, so that the stability of the result of the device is greatly improved, an operator sends an instruction by system software to check the detection process at any time, analyzes the detection result after the detection is finished, prints a detection report, effectively improves the accuracy of the result, saves the labor and effectively shortens the detection time.
Drawings
FIG. 1 is a schematic diagram of the fully automatic intelligent formaldehyde detector;
FIG. 2 is a schematic view of a formaldehyde detection process;
FIG. 3 is a schematic diagram of a standard curve test;
FIG. 4 is a graph showing the relationship between the operating time and the amount of liquid in the peristaltic pump of the present invention;
FIG. 5 is a graph of a sample being tested;
FIG. 6 shows the test data and the fitted curve for a certain standard curve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to FIG. 2, based on a full-automatic intelligent formaldehyde detector using a peristaltic pump to realize liquid flow, 4.60 formaldehyde release amount in a physicochemical property test method for artificial boards and veneers with GB/T17657-3A climate box method.
And (3) detecting the sample test piece on the 2 nd day after the edge sealing of the sample test piece is placed in a formaldehyde test box according to the following flow:
1. 25ml of distilled water was added to each of 2 absorption bottles, and 120L of gas was withdrawn (withdrawal rate 2L/min, withdrawal time 1 hour).
2. The solution in 2 absorption bottles was mixed and 10ml of liquid was drawn from them into a volumetric flask and 10ml of acetylacetone and 10ml of acetamide were added and shaken up.
3. Heating in 60 deg.C water bath for 10min, and standing in shade for 1 hr.
4. The mixed solution is put into a spectrophotometer cuvette, and the absorbance of the solution is measured by using the incident wavelength of 412nm and the optical path of 50 mm.
5. The above is a procedure of detecting the concentration of formaldehyde in the chamber for 1 time. The standard stipulates that the test is carried out 2 times a day for the first 4 days, and is carried out once a day later until the average value of the test results of the last 4 timesDeviation from maximum or minimum value less than 5% or 0.005mg/m3(defined as reaching a steady state), the detection is stopped.
6. If the steady state is not reached, the test is stopped after 28 consecutive days.
After the test piece is placed in a formaldehyde test box, the formaldehyde concentration in the box body is automatically detected every day according to the standard, whether the last 4 detection results reach a stable state or not is judged, if the stable state is reached, the detection is stopped, and if the stable state is not reached, the detection is stopped after the test is continuously carried out for 28 days. Namely, after the edge of the test piece is sealed and put into the test box, the whole process is automatically detected until the test is finished.
Referring to fig. 3, the current standard curve test procedure:
1. a volume of a formaldehyde solution containing 3mg of formaldehyde (for example, 2ml for a formaldehyde concentration of 1.5 mg/ml; 3ml for a formaldehyde concentration of 1 mg/ml) was taken up into a 1000ml volumetric flask (diluted to 1000ml) as a formaldehyde calibration solution.
2. 5ml, 10ml, 20ml, 50ml and 100ml of formaldehyde calibration solution were respectively sucked into 100ml volumetric flasks (diluted to 100ml), 10ml of acetylacetone and 10ml of ammonium acetate were respectively added to each volumetric flask, shaken well, heated in a water tank at 60 ℃. + -. 5 ℃ for 10min, and then placed in the dark for 60 min.
3. The absorbance was measured at a wavelength of 412nm on a spectrophotometer, respectively. And (3) drawing a standard curve according to the mass concentration of formaldehyde (0 mg/L-3 mg/L) light absorption condition, wherein the slope is determined by calculation of the standard curve, and 4 significant digits are reserved (the standard curve is linear fitting of the 5 points, the abscissa is absorbance, and the ordinate is formaldehyde concentration).
All the processes are automatically carried out until the formaldehyde solution and the distilled water are prepared up to complete
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. Full-automatic formaldehyde intelligent detector based on use peristaltic pump to realize liquid measure circulation, its characterized in that: the full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump needs to use the following materials and instruments: distilled water, test solution, reagent, peristaltic pump, pipette, five containers, a water bath, test tube, a spectrophotometer and programmable logic controller, based on use the peristaltic pump to realize the full-automatic formaldehyde intelligent detector's of liquid measure circulation basic work flow does:
s1, controlling the flow direction and duration of the peristaltic pump by connecting a computer with a Programmable Logic Controller (PLC), circulating distilled water, test solution, reagent and other liquids according to national standards, and testing the light transmittance of the mixed solution by passing the mixed solution through a spectrophotometer at the final stage. And calculating the formaldehyde content of the sample. The whole process is full-automatic, and manual intervention is not needed.
S2, designing a test program of a formaldehyde content standard curve according to the national standard by the instrument. The computer is connected with a programmable logic controller PLC to control the flow direction of the peristaltic pump, calibration solution is prepared according to the following proportion (0%, 5%, 10%, 20%, 50% and 100%), and the calibration solution with various proportions passes through a spectrophotometer to test the light transmittance of the calibration solution. Thus, the slope of the standard curve of formaldehyde content is calculated.
S3, system software records all data generated during the experiment, including sample test data and standard curve test data. The system software can analyze, calculate, plot and print results reports on all test data.
2. The full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump as claimed in claim 1, wherein: the full-automatic intelligent formaldehyde detector for realizing liquid flow by using the peristaltic pump mainly comprises a liquid flow system, an electronics control system, system software and a spectrophotometer.
3. The full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump as claimed in claim 2, wherein: the full-automatic intelligent formaldehyde detector box based on liquid volume circulation realized by using the peristaltic pumps is internally and combinatively provided with a liquid (distilled water, reagent and mixed liquid) circulation system which takes 20 peristaltic pumps as core components.
4. The full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump as claimed in claim 2, wherein: an electronics control system taking PLC as a core is installed in the full-automatic intelligent formaldehyde detector box body for realizing liquid flow circulation by using the peristaltic pump, and the flow direction and time of all 20 peristaltic pump liquids are controlled.
5. The full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump as claimed in claim 2, wherein: a system software is installed in a touch screen computer above a box body of the full-automatic intelligent formaldehyde detector for realizing liquid volume circulation by using a peristaltic pump, the system software is operation and control software of the whole detector, an operator sends an instruction from the system software, checks the detection process at any time, analyzes the detection result after the detection is finished, and prints a detection report.
6. The full-automatic intelligent formaldehyde detector based on the liquid volume circulation realized by using the peristaltic pump as claimed in claim 2, wherein: the spectrophotometer is purchased from the market. The light transmittance of the monochromatic light in the mixed liquid is measured and compared by using the device, so that the content of formaldehyde in the mixed liquid is calculated. And deducing the formaldehyde content of the tested sample from the standard curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010648022.4A CN113899708A (en) | 2020-07-07 | 2020-07-07 | Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010648022.4A CN113899708A (en) | 2020-07-07 | 2020-07-07 | Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113899708A true CN113899708A (en) | 2022-01-07 |
Family
ID=79186954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010648022.4A Pending CN113899708A (en) | 2020-07-07 | 2020-07-07 | Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113899708A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964937A (en) * | 2015-06-25 | 2015-10-07 | 合肥聚合辐化技术有限公司 | Method for conducting spectrophotometric determination on formaldehyde content of water-based coating through acetylacetone |
| CN107300556A (en) * | 2017-06-12 | 2017-10-27 | 浙江检创检测技术服务有限公司 | A kind of assay method of formaldehyde in textile |
| CN110646409A (en) * | 2019-10-25 | 2020-01-03 | 四川轻化工大学 | Formaldehyde online determination detection agent, system and method |
| CN210222042U (en) * | 2019-06-27 | 2020-03-31 | 上海磐合科学仪器股份有限公司 | Online intelligent air quality formaldehyde tester |
-
2020
- 2020-07-07 CN CN202010648022.4A patent/CN113899708A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964937A (en) * | 2015-06-25 | 2015-10-07 | 合肥聚合辐化技术有限公司 | Method for conducting spectrophotometric determination on formaldehyde content of water-based coating through acetylacetone |
| CN107300556A (en) * | 2017-06-12 | 2017-10-27 | 浙江检创检测技术服务有限公司 | A kind of assay method of formaldehyde in textile |
| CN210222042U (en) * | 2019-06-27 | 2020-03-31 | 上海磐合科学仪器股份有限公司 | Online intelligent air quality formaldehyde tester |
| CN110646409A (en) * | 2019-10-25 | 2020-01-03 | 四川轻化工大学 | Formaldehyde online determination detection agent, system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10295458B2 (en) | Analytical device for determining a digestion parameter of a liquid sample | |
| US9989548B2 (en) | Automatic analyzer and method | |
| US9518900B2 (en) | Sample preparation system for an analytical system for determining a measured variable of a liquid sample | |
| CN101907558A (en) | Total organic carbon online analyzer and method for analyzing total organic carbon | |
| CN115436353B (en) | High-low concentration real-time switching analyzer colorimetric system and use method thereof | |
| CN210222042U (en) | Online intelligent air quality formaldehyde tester | |
| JP7493812B2 (en) | Method and apparatus for atomic fluorescence spectrometry using water as the carrier fluid - Patents.com | |
| CN106959350A (en) | A kind of QPQ technologies base salt cyanic acid radical content fully-automated synthesis analytical instrument | |
| CN107422136B (en) | Method for operating an automatic analyzer | |
| CN106018319A (en) | Infrared fume monitoring system | |
| CN210923607U (en) | Automatic multi-gas quantitative configuration system for gas analysis | |
| CN104792720A (en) | Method for measuring titanium element or titanium dioxide content in diacetate cellulose tow | |
| CN113899708A (en) | Full-automatic intelligent formaldehyde detector based on use peristaltic pump to realize liquid measure circulation | |
| US11125696B2 (en) | Colorimetric analyzer with de-bubbling | |
| CN213302004U (en) | Water quality permanganate index on-line analyzer | |
| CN113607875A (en) | Three primary colour detecting method acid-base neutralization titrator | |
| CN104764726A (en) | Water quality monitoring instrument and method | |
| CN209231315U (en) | The total blood urea/nitrogen analyzer of water sample | |
| CN115436151A (en) | Heavy metal concentration analysis system | |
| US20200182756A1 (en) | Method for diluting a sample liquid and dilution unit for a subsequent analysis | |
| CN209247624U (en) | A kind of water quality mercury online auto monitoring system | |
| Williams et al. | Titration of spoilt beer samples by flow-injection analysis | |
| CN207457062U (en) | Blood purification system urea content monitoring device | |
| CN100498291C (en) | Beryllium determination solution and colorimetric determination tube therefor | |
| Vurek | Calcium measurement: picomole quantitation by continuous-flow colorimetry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |