CN116907928A - Full-automatic measuring device and method for phosphorus pentoxide in air - Google Patents
Full-automatic measuring device and method for phosphorus pentoxide in air Download PDFInfo
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- CN116907928A CN116907928A CN202310670539.7A CN202310670539A CN116907928A CN 116907928 A CN116907928 A CN 116907928A CN 202310670539 A CN202310670539 A CN 202310670539A CN 116907928 A CN116907928 A CN 116907928A
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- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 238000005259 measurement Methods 0.000 claims abstract description 47
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 44
- 238000002835 absorbance Methods 0.000 claims abstract description 30
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 31
- 238000010521 absorption reaction Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000000284 extract Substances 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 16
- 239000012528 membrane Substances 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000004400 mucous membrane Anatomy 0.000 description 2
- 235000011007 phosphoric acid Nutrition 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000588807 Bordetella Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000011481 absorbance measurement Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000001508 eye Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- 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
- 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
- G01N21/3103—Atomic absorption analysis
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The application relates to the technical field of phosphorus pentoxide content measurement, in particular to a full-automatic device and method for measuring phosphorus pentoxide in air. The sample collecting part is provided with a Bosch gas collecting pipe and a fan, and the fan enables the inside of the Bosch gas collecting pipe to form negative pressure and automatically suck air; the sample preparation part is provided with a syringe pump and a multi-way valve, a plurality of connecting ports of the multi-way valve are respectively connected with the detection reagents, the central port of the multi-way valve is connected with the syringe pump, and the syringe pump respectively extracts and conveys each detection reagent into the Bo gas collection tube through the multi-way valve; an analysis measuring section for detecting absorbance of the solution in the Boehringer's gas collection tube; the control part controls the operation of the whole device; the display input section displays parameter settings, operation procedures, and operation results of the control section. The device can be used for automatically measuring the content of phosphorus pentoxide in the field, monitoring in real time, and is convenient and quick to operate, detection time and detection steps are shortened, and detection efficiency is improved.
Description
Technical Field
The application relates to the technical field of phosphorus pentoxide content measurement, in particular to a full-automatic device and method for measuring phosphorus pentoxide in air.
Background
Phosphorus pentoxide, also known as phosphoric anhydride, is generally a white, extremely deliquescent crystalline powder, is a common raw material and reagent in the chemical industry, and is widely used in the industries of medicine, coating aids, printing aids, antistatic agents, titanate coupling agents, phosphorus oxychloride and the like, and is mainly used for preparing high-purity phosphoric acid, as a gas and liquid desiccant, as a dehydrating agent for organic synthesis, and for preparing organic phosphate. Phosphorus pentoxide is nonflammable, but can react vigorously with water and organic matters such as wood, cotton or grass to release heat, and can cause combustion. When meeting tide, the water can generate a great amount of smoke and heat, and when meeting tide, the water is slightly corrosive to most metals. The phosphorus pentoxide has strong local irritation, and the steam and dust can seriously irritate eyes, mucous membranes, skin and respiratory systems and corrode the skin and mucous membranes. When the concentration of phosphorus pentoxide in the air exceeds 1mg/m 3 When the composition is in a high concentration, the composition can be in a faint state on site.
The existing air collection process is easily affected by weather factors. The filter membrane is fixed in an air collector, negative pressure is formed by evacuating air through the air collector, and phosphorus pentoxide in the air is fixed on the filter membrane after the outside air passes through the filter membrane. However, in rainy days or in weather with high air humidity, phosphorus pentoxide is easy to get on the filter membrane together with moisture in the air, so that the exhaust fan at the rear end of the filter membrane cannot draw moving wind, the collection efficiency is low, and a fan of the air sampler is easy to damage.
In addition, the recovered filter membrane is sheared by scissors and placed in a container, and then various reagents are added to shake the filter membrane to dissolve the filter membrane. However, the amplitude and frequency of the oscillation of each experimenter will be different, which will lead to the dissolution of phosphorus pentoxide in the liquid on the filter membrane, and the final measurement data will be misaligned.
Disclosure of Invention
In order to automatically measure the content of phosphorus pentoxide in the field, the application shortens the detection time and the detection steps and improves the detection efficiency, and provides a full-automatic device and method for measuring the phosphorus pentoxide in the air.
The application provides a full-automatic device and a method for measuring phosphorus pentoxide in air, which adopts the following technical scheme:
a full-automatic measuring device for phosphorus pentoxide in air comprises
The sample collection part is provided with a Bo gas collection pipe and a fan, and the fan enables the inside of the Bo gas collection pipe to form negative pressure and automatically suck air;
the sample preparation part is provided with a syringe pump and a multi-way valve, a plurality of connecting ports of the multi-way valve are respectively connected with detection reagents, a central port of the multi-way valve is connected with the syringe pump, and each detection reagent is respectively extracted and conveyed into the Bo gas collection tube through the multi-way valve by the syringe pump;
an analysis measuring section for detecting absorbance of the solution in the Boehringer's gas collection tube;
the control part is respectively electrically connected with the fan, the injection pump, the multi-way valve and the analysis and measurement part and is used for controlling operation;
and the display input part is electrically connected with the control part and is used for displaying parameter setting, operation process and operation result of the control part.
Through adopting above-mentioned technical scheme, sample collection part, sample preparation part, analysis measurement part all control the operation through control part, realize the automatic loading of detect reagent and enter into the gas collection pipe of Bo, and the fan forms the negative pressure with the inside of gas collection pipe of Bo, under the principle of atmospheric pressure balance, outside air enters into to be absorbed by the absorption liquid in the gas collection pipe of Bo after, reacts with detect reagent to carry out automated inspection through analysis measurement part. The whole measuring process can be carried out on the sampling site, detection data can be obtained in real time, the filter membrane sampling is reduced, the complex process of carrying back to a laboratory for redissolution is needed, the sampling time is greatly reduced, the whole process is in an automatic mode, no toxic reagent is needed to be contacted manually, subsequent operation is not needed to be participated manually, the detection efficiency is improved, and the safety is high.
Optionally, the gas collection tube of bordetella includes outer body, inner tube a and inner tube B, the top of outer body, bottom are the closed condition, the top of outer body is provided with inlet and air inlet, inner tube a with inner tube B all is located the inside of outer body, inner tube a's upper end upwards passes the inlet, inner tube B's upper end upwards passes the air inlet, inner tube a's top pass through the pipeline with the exit linkage of multi-way valve, inner tube a's bottom the bottom of inner tube B all stretches into downwards the lower extreme bottom of outer body, and with there is the interval in the bottom of outer body, the upper end side of outer body is provided with the gas outlet, the gas outlet with the air intake of fan passes through the pipeline connection.
Through adopting above-mentioned technical scheme, inner tube A and inner tube B are used for adding detect reagent respectively, collect outside air, are in charge of carrying out different operations, are difficult for polluting, and multiple detect reagent is through multi-way valve through inner tube A entering into in proper order in the Bo's gas collection pipe, and the fan is through the inside negative pressure state of taking out of Bo's gas collection pipe into of gas outlet for outside air can enter into in the Bo's gas collection pipe through inner tube B and be absorbed and react by the absorption liquid.
Optionally, a plurality of connectors in the multi-way valve are connected with a plurality of reagent bottles through pipelines respectively, each reagent bottle is filled with a detection reagent, and one of the connectors in the multi-way valve is used as an outlet.
Through adopting above-mentioned technical scheme, the multiport valve realizes carrying multiple detection reagent one by one into Bose gas collection pipe through an export, convenient operation, and the part is simple and flexible in use.
Optionally, the analysis measuring part comprises a measurement generating device and a measurement receiving device, the measurement generating device is located at the side face of the lower end of the Bodhisattva gas collecting tube, the measurement generating device is used for measuring absorbance of a solution in the Bodhis gas collecting tube, the measurement receiving device is respectively and electrically connected with the measurement generating device and the control part, and the measurement receiving device feeds back data measured by the measurement generating device to the control part and displays the data in the display input part.
Through adopting above-mentioned technical scheme, the control part can control and measure generating device and carry out absorbance measurement to the solution of Bose gas collection pipe inside automatically, and measurement receiving device can receive the absorbance value that measurement generating device measured and feed back absorbance value to control part and show at the display input part, and degree of automation is high, and the testing result is visual, convenient to use is swift.
Optionally, the air outlet is higher than the bottom of the inner pipe A and the bottom of the inner pipe B.
Through adopting above-mentioned technical scheme, the setting of gas outlet makes the problem that the mixed pollution of gas and liquid is difficult to appear in the gas collection pipe of Bose.
Optionally, the air inlet is connected with gas collection telescopic link through the connecting pipe can be dismantled, the top of gas collection telescopic link is used for absorbing air.
Through adopting above-mentioned technical scheme, the height in the inside of gas collection pipe of gas collection telescopic link can prolong air admission Bo, and air gets into by the top of gas collection telescopic link, and gas collection telescopic link can extend and shorten length, and the length of gas collection telescopic link can freely be adjusted, reaches 2m how high, conveniently gathers the gas of not co-altitude.
Optionally, the top of the gas collection telescopic rod is honeycomb-shaped.
Through adopting above-mentioned technical scheme, the top of gas collection telescopic link is cellular, is favorable to absorbing air more even.
A full-automatic measuring method for phosphorus pentoxide in air comprises the following detecting steps:
a. the control part controls the injection pump to work, the injection pump is matched with the multi-way valve to convey pure water into the Boehringer gas collection tube through the outlet to form absorption liquid, and the absorption liquid is used for absorbing and dissolving phosphorus pentoxide;
b. the control part controls the operation of a fan, the fan discharges the gas of the Bo gas collection tube through an air outlet, negative pressure is formed in the Bo gas collection tube, external air enters below the liquid level of the absorption liquid in the Bo gas collection tube through an inner tube B, phosphorus pentoxide in the air is absorbed by the absorption liquid, and the rest air is pumped out by the fan;
c. the control part controls the injection pump to work, and the injection pump is matched with the multi-way valve to respectively convey each detection reagent into the Boehringer gas collection tube through the outlet for reaction;
d. the control part controls the measurement generating device to detect the absorbance of the solution in the Boehringer gas collection tube and transmits the absorbance value to the measurement receiving device;
e. the measurement receiving means feeds back the absorbance value to the control section and displays it on the display input section.
By adopting the technical scheme, the air collection process, the detection reagent preparation and sample introduction process and the analysis and detection process are all automatically carried out by the control part, and the timeliness and the working efficiency of detection are improved by detecting and presenting data in real time.
In summary, the application has the following beneficial effects:
1. the air collection process, the detection reagent preparation sample introduction process and the analysis detection process are all automatically carried out by the control part, and can be completed on the sampling site, so that the laboratory is not required to be driven back after sampling, the detection time is shortened, the detection data can be obtained in real time on site, the time for obtaining the monitoring data is shortened to a great extent, and the timeliness and the detection efficiency are improved.
2. The Bo gas collecting tube directly collects and absorbs phosphorus pentoxide in the air, so that the complex flow of taking the filter membrane back to a laboratory for re-dissolution after sampling is reduced, the sampling time is greatly shortened, and the collecting process is not influenced by weather factors. The defect of filter membrane sampling and the problem of inaccurate measurement results are overcome.
3. The control part and the display input part enable the whole detection process to be automatically carried out and visual, the whole detection process does not need to be manually contacted with any toxic reagent, and does not need to be manually participated in all subsequent works, so that the operation is simple and quick.
Drawings
Fig. 1 is a schematic diagram of the structure of the device in the embodiment.
Reference numerals illustrate: 1. a Bosch gas collection tube; 2. a blower; 3. a gas collection telescopic rod; 4. a measurement generating device; 5. a measurement receiving device; 6. a syringe pump; 7. a multi-way valve; 8. a reagent bottle; 9. a connecting pipe; 10. an absorption liquid; 11. an inner tube A; 12. an inner tube B; 13. an outer tube body.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
Wherein like parts are designated by like reference numerals. It should be noted that the words "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner" and "outer" used in the following description refer to directions in the drawings, and are not limited thereto.
The present application will be described in further detail with reference to fig. 1.
The embodiment of the application discloses a full-automatic device and a method for measuring phosphorus pentoxide in air.
Example 1
Referring to FIG. 1, a full-automatic device for measuring phosphorus pentoxide in air comprises
The sample collection part is provided with a Bo gas collection tube 1 and a fan 2, and the fan 2 enables the inside of the Bo gas collection tube 1 to form negative pressure and automatically suck air; the sample preparation part is provided with a syringe pump 6 and a multi-way valve 7, a plurality of connecting ports of the multi-way valve 7 are respectively connected with detection reagents, a central port of the multi-way valve 7 is connected with the syringe pump 6, and each detection reagent is respectively extracted and conveyed into the Bo gas collection tube 1 by the syringe pump 6 through the multi-way valve 7; an analysis measuring section for detecting absorbance of the solution in the Boehringer's gas collection tube 1; the control part is respectively and electrically connected with the fan 2, the injection pump 6, the multi-way valve 7 and the analysis and measurement part and performs control operation; and the display input part is electrically connected with the control part and is used for displaying parameter setting, operation process and operation result of the control part.
The multiple connection ports in the multi-way valve 7 are respectively connected with the multiple reagent bottles 8 through pipelines, each reagent bottle 8 is filled with a detection reagent, and one connection port in the multi-way valve 7 is used as an outlet. The Bao's gas collection pipe 1 includes outer body 13, inner tube A11 and inner tube B12, the top of outer body 13, the bottom is the confined state, the top of outer body 13 is provided with inlet and air inlet, inner tube A11 and inner tube B12 all are located the inside of outer body 13, the upper end of inner tube A11 upwards passes the inlet, the upper end of inner tube B12 upwards passes the air inlet, the top of inner tube A11 passes through the exit linkage of pipeline and multiway valve 7, the bottom of inner tube A11, the bottom of inner tube B12 all downwardly extending to the lower extreme bottom of outer body 13, and with there is the interval in the bottom of outer body 13, the upper end side of outer body 13 is provided with the gas outlet, the gas outlet passes through the pipe connection with the air intake of fan 2. The air outlet is connected with the air inlet of the fan 2 through a pipeline, and the liquid inlet is connected with the outlet of the multi-way valve 7.
The analysis and measurement part comprises a measurement generating device 4 and a measurement receiving device 5, wherein the measurement generating device 4 is positioned on the side surface of the lower end of the Bosch gas collection tube 1, the measurement generating device 4 is used for measuring the absorbance of the solution in the Bosch gas collection tube 1, the measurement receiving device 5 is respectively and electrically connected with the measurement generating device 4 and the control part, and the measurement receiving device 5 feeds back the data measured by the measurement generating device 4 to the control part and displays the data on the display input part.
The measuring generating device 4 is a monochromatic light LED lamp with fixed wavelength, and the wavelength used by the measuring generating device 4 in measurement is 700nm. The measurement generating device 4 is an LED lamp bead capable of emitting 700nm. The measuring and receiving means 5 are a filter and a silicon photocell for sensing the intensity of the emitted light. The principle of the optical filter and the silicon photocell as the measuring and receiving device 5 for sensing the intensity of light belongs to the prior art, and will not be described here again. The initial intensity of light passes through the measured liquid, the residual intensity of light is converted into corresponding electric signals, the absorbance is calculated through the two electric signals, and the absorbance is converted into concentration according to the lambert beer law.
The air inlet is detachably connected with a gas collection telescopic rod 3 through a connecting pipe 9, and the top of the gas collection telescopic rod 3 is used for absorbing air. The top of the gas collection telescopic rod 3 is honeycomb-shaped.
A full-automatic measuring method for phosphorus pentoxide in air comprises the following detecting steps:
a. the control part controls the injection pump 6 to work, the injection pump 6 is matched with the multi-way valve 7 to convey pure water into the Boehringer gas collection tube 1 through an outlet to form an absorption liquid 10, and the absorption liquid 10 is used for absorbing and dissolving phosphorus pentoxide;
b. the control part controls the fan 2 to operate, the fan 2 discharges the gas of the Bo gas collection tube 1 through the air outlet, negative pressure is formed in the Bo gas collection tube 1, external air enters below the liquid level of the absorption liquid 10 in the Bo gas collection tube 1 through the inner tube B, phosphorus pentoxide in the air is absorbed by the absorption liquid 10, and the rest air is pumped out by the fan 2;
c. the control part controls the injection pump 6 to work, and the injection pump 6 is matched with the multi-way valve 7 to respectively convey each detection reagent into the Bosch gas collection tube 1 for reaction through an outlet;
d. the control part controls the measurement generating device 4 to detect the absorbance of the solution in the Boehringer gas collection tube 1 and transmits the absorbance value to the measurement receiving device 5;
e. the measurement receiving means 5 feeds back the absorbance value to the control section and displays it on the display input section.
The air collection process, the detection reagent preparation sample introduction process and the analysis detection process are all automatically carried out by the control part, and can be completed on the sampling site, so that the laboratory is not required to be driven back after sampling, the detection time is shortened, the detection data can be obtained in real time on site, the time for obtaining the monitoring data is shortened to a great extent, and the timeliness and the detection efficiency are improved. The Bo gas collecting tube 1 directly collects and absorbs phosphorus pentoxide in the air, so that the filter membrane sampling is reduced, and then the complex process of redissolving in a laboratory is carried back, the sampling time is greatly reduced, and the collecting process is not influenced by weather factors. The defect of filter membrane sampling and the problem of inaccurate measurement results are overcome. The control part and the display input part enable the whole detection process to be automatically carried out and visual, the whole detection process does not need to be manually contacted with any toxic reagent, and does not need to be manually participated in all subsequent works, so that the operation is simple and quick.
The sample collecting part, the sample preparing part and the analysis measuring part are controlled to run by the control part, so that the automatic loading of the detection reagent is realized, the detection reagent enters the Bo gas collecting tube 1, the fan 2 forms negative pressure inside the Bo gas collecting tube 1, and under the principle of atmospheric pressure balance, the external air enters the Bo gas collecting tube 1 to be absorbed by the absorption liquid and react with the detection reagent, and the automatic detection is carried out by the analysis measuring part. The whole measuring process can be carried out on the sampling site, detection data can be obtained in real time, the filter membrane sampling is reduced, the complex process of carrying back to a laboratory for redissolution is needed, the sampling time is greatly reduced, the whole process is in an automatic mode, no toxic reagent is needed to be contacted manually, subsequent operation is not needed to be participated manually, the detection efficiency is improved, and the safety is high.
The control part can control the measurement generating device 4 to automatically measure the absorbance of the solution in the Bo gas collection tube 1, and the measurement receiving device 5 can receive the absorbance value measured by the measurement generating device 4 and feed back the absorbance value to the control part and display the absorbance value on the display input part, so that the automation degree is high, the detection result is visual and the use is convenient and quick. The height in the inside of gas collection pipe 1 of gas collection telescopic link 3 can prolong the air admission Bo, and the air gets into by the top of gas collection telescopic link 3, and gas collection telescopic link 3 can extend and shorten length, and the length of gas collection telescopic link 3 can freely be adjusted, reaches 2m how high, conveniently gathers the gas of not co-altitude.
Working principle:
the control part controls the multi-way valve 7 to be matched with the injection pump 6, and the injection pump 6 pumps and conveys pure water into the outer pipe body 13 through the outlet of the multi-way valve 7 and the inner pipe A11 to form an absorption liquid 10 for absorbing phosphorus pentoxide in the air entering the inner pipe body 13. The control part controls the fan 2 to operate, the fan 2 pumps the inside of the outer pipe body 13 into a negative pressure state, and under the principle of atmospheric pressure balance, air can automatically enter the outer pipe body 13 of the Bob gas collecting pipe 1 through the air inlet, so that the air is absorbed and dissolved by the absorption liquid 10. After the phosphorus pentoxide in the air is absorbed and dissolved by the absorption liquid 10, the injection pump 6 extracts and conveys various detection reagents into the outer tube body 13 through the outlet of the multi-way valve 7 and the inner tube A11, so that the detection reagents and the phosphorus pentoxide fully react. The absorbance of the solution in the outer tube 13 was measured by the measuring generator 4, and the absorbance was measured under visible light of 700nm in blue after the phosphorus pentoxide reacted with the detection reagent. The measurement receiving means 5 receives and feedback-transmits the value of absorbance measured by the measurement generating means 4 to the control section, and the value of absorbance is presented by the display input section. The method for calculating phosphorus pentoxide by measuring absorbance is specifically referred to the content of "method principle" of item 3 in environmental standard HJ 546-2015. How the absorbance is converted to concentration is detailed in the contents of "analysis step" at item 8 and "calculation and representation" at item 9 in HJ 546-2015.
Pure water is used as the absorbing liquid 10 in the present application to absorb phosphorus pentoxide in air. After phosphorus pentoxide in the air contacts pure water, chemical reaction occurs to generate orthophosphoric acid and metaphosphoric acid which remain in the water. The absorption liquid 10 and the detection reagent differ from each other by the "principle of method" of item 3 in HJ 546-2015: the absorption liquid 10 is only used for absorbing phosphorus pentoxide in the air, and absorbs it into pure water. The solution formed after the phosphorus pentoxide is absorbed by pure water cannot be directly used for measuring the concentration. Since a blue substance was measured at 700nm, the deeper the blue color was, the higher the concentration of phosphorus pentoxide contained. However, the absorbent liquid 10 is colorless and transparent. In order to make it blue, it is necessary to add a detection reagent, and to make the absorption solution 10 in which phosphorus pentoxide is dissolved react with the detection reagent in a blue color. Reference is made in particular to the content of "method principle" of clause 3 in HJ 546-2015.
The present embodiment is illustrative of the present application, but not limiting, and variations, modifications, additions or substitutions within the spirit and scope of the application are possible, and any person skilled in the art who has read the present description can make modifications without creative contribution to the embodiment as required, but are protected by the patent laws within the scope of the claims of the present application.
Claims (8)
1. A full-automatic measuring device of phosphorus pentoxide in air, its characterized in that: comprising
The sample collection part is provided with a Bodhisattva gas collection tube (1) and a fan (2), and the fan (2) enables the inside of the Bodhis gas collection tube (1) to form negative pressure and automatically suck air;
the sample preparation part is provided with a syringe pump (6) and a multi-way valve (7), a plurality of connecting ports of the multi-way valve (7) are respectively connected with detection reagents, a central port of the multi-way valve (7) is connected with the syringe pump (6), and each detection reagent is respectively extracted and conveyed into the Bo gas collection tube (1) by the syringe pump (6) through the multi-way valve (7);
an analysis measuring section for detecting absorbance of the solution in the Boehringer's gas collection tube (1);
the control part is respectively electrically connected with the fan (2), the injection pump (6), the multi-way valve (7) and the analysis and measurement part and performs control operation;
and the display input part is electrically connected with the control part and is used for displaying parameter setting, operation process and operation result of the control part.
2. The fully automatic device for measuring phosphorus pentoxide in air according to claim 1, wherein: the utility model provides a Bose gas collection pipe (1) includes outer body (13), inner tube A (11) and inner tube B (12), the top of outer body (13), bottom are the closed condition, the top of outer body (13) is provided with inlet and air inlet, inner tube A (11) with inner tube B (12) all are located the inside of outer body (13), the upper end of inner tube A (11) upwards passes the inlet, the upper end of inner tube B (12) upwards passes the air inlet, the top of inner tube A (11) pass through the pipeline with the exit linkage of multiway valve (7), the bottom of inner tube A (11) the bottom of inner tube B (12) all stretches into downwards the lower extreme bottom of outer body (13), and with the bottom of outer body (13) exists the interval, the upper end side of outer body (13) is provided with the gas outlet, the gas outlet with the air intake of fan (2) passes through the pipeline connection.
3. The fully automatic device for measuring phosphorus pentoxide in air according to claim 2, wherein: the multiple connection ports in the multiple-way valve (7) are respectively connected with the multiple reagent bottles (8) through pipelines, each reagent bottle (8) is filled with a detection reagent, and one connection port in the multiple-way valve (7) is used as an outlet.
4. A fully automatic device for measuring phosphorus pentoxide in air according to claim 3, wherein: the analysis measuring part comprises a measuring generating device (4) and a measuring receiving device (5), the measuring generating device (4) is located on the side face of the lower end of the Bo gas collecting tube (1), the measuring generating device (4) is used for measuring the absorbance of a solution in the Bo gas collecting tube (1), the measuring receiving device (5) is respectively and electrically connected with the measuring generating device (4) and the control part, and the measuring receiving device (5) feeds back data measured by the measuring generating device (4) to the control part and displays the data in the display input part.
5. The fully automatic device for measuring phosphorus pentoxide in air according to claim 2, wherein: the air outlet is higher than the bottom of the inner pipe A (11) and the bottom of the inner pipe B (12).
6. The fully automatic device for measuring phosphorus pentoxide in air according to claim 5, wherein: the air inlet is detachably connected with a gas collection telescopic rod (3) through a connecting pipe (9), and the top of the gas collection telescopic rod (3) is used for absorbing air.
7. The fully automatic device for measuring phosphorus pentoxide in air according to claim 6, wherein: the top of the gas collection telescopic rod (3) is honeycomb-shaped.
8. A full-automatic measuring method for phosphorus pentoxide in air is characterized by comprising the following steps: the fully automatic device for measuring phosphorus pentoxide in air according to claim 4 is used for detecting the content of the phosphorus pentoxide in the air, and the detecting step comprises the following steps:
a. the control part controls the injection pump (6) to work, the injection pump (6) is matched with the multi-way valve (7) to convey pure water into the Boehringer gas collection tube (1) through the outlet to form absorption liquid (10), and the absorption liquid (10) is used for absorbing and dissolving phosphorus pentoxide;
b. the control part controls the fan (2) to operate, the fan (2) discharges the gas of the Bo gas collection tube (1) through the air outlet, negative pressure is formed in the Bo gas collection tube (1), external air enters below the liquid level of the absorption liquid (10) in the Bo gas collection tube (1) through the inner tube B (12), phosphorus pentoxide in the air is absorbed by the absorption liquid (10), and the rest air is extracted by the fan (2);
c. the control part controls the injection pump (6) to work, and the injection pump (6) is matched with the multi-way valve (7) to respectively convey each detection reagent into the Boehringer gas collection tube (1) through the outlet for reaction;
d. the control part controls the measurement generating device (4) to detect the absorbance of the solution in the Boehringer gas collection tube (1) and transmits the absorbance value to the measurement receiving device (5);
e. the measurement receiving means (5) feeds back the absorbance value to the control section and displays it on the display input section.
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| CN202310670539.7A CN116907928A (en) | 2023-06-08 | 2023-06-08 | Full-automatic measuring device and method for phosphorus pentoxide in air |
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| CN202310670539.7A CN116907928A (en) | 2023-06-08 | 2023-06-08 | Full-automatic measuring device and method for phosphorus pentoxide in air |
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