CN116593449A - Portable chemiluminescent device for continuously detecting hydroxyl radicals in situ - Google Patents
Portable chemiluminescent device for continuously detecting hydroxyl radicals in situ Download PDFInfo
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- CN116593449A CN116593449A CN202310615401.7A CN202310615401A CN116593449A CN 116593449 A CN116593449 A CN 116593449A CN 202310615401 A CN202310615401 A CN 202310615401A CN 116593449 A CN116593449 A CN 116593449A
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- 238000011065 in-situ storage Methods 0.000 title claims description 13
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 239000007800 oxidant agent Substances 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 16
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- KGLPWQKSKUVKMJ-UHFFFAOYSA-N 2,3-dihydrophthalazine-1,4-dione Chemical group C1=CC=C2C(=O)NNC(=O)C2=C1 KGLPWQKSKUVKMJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002516 radical scavenger Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 18
- 230000008859 change Effects 0.000 abstract description 9
- 239000003570 air Substances 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- IVFWRXCDEIPZQL-UHFFFAOYSA-N 4-hydroxybenzene-1,2-dicarbohydrazide Chemical compound NNC(=O)C1=CC=C(O)C=C1C(=O)NN IVFWRXCDEIPZQL-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000036542 oxidative stress Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 238000004435 EPR spectroscopy Methods 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 102100035115 Testin Human genes 0.000 description 1
- 101710070533 Testin Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- IKWQWOFXRCUIFT-UHFFFAOYSA-N benzene-1,2-dicarbohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C(=O)NN IKWQWOFXRCUIFT-UHFFFAOYSA-N 0.000 description 1
- 238000002038 chemiluminescence detection Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- XYNZKHQSHVOGHB-UHFFFAOYSA-N copper(3+) Chemical compound [Cu+3] XYNZKHQSHVOGHB-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/76—Chemiluminescence; Bioluminescence
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The application discloses a portable chemiluminescent device for continuously detecting hydroxyl radicals (OH) on site, which comprises a peristaltic pump, a mixing tank, a detection tank, a photomultiplier, a photon counter, a terminal and an instrument shell, wherein the peristaltic pump is arranged on the mixing tank; the terminal is arranged outside the instrument shell, the other elements are arranged in the instrument shell, two oxidant inlets for respectively inputting two oxidants and a sample inlet for inputting a sample to be detected are arranged on the instrument shell, the three are mixed by the mixing tank and input into the detection tank to generate chemiluminescence, the photomultiplier converts optical signals generated in the detection tank into electrical signals, and the electrical signals are transmitted to the terminal through the photon counter, so that the terminal displays the detection result of OH. The device can measure the OH generated in various environmental media such as air, water and soil, realize the measurement of the OH generation behavior, study the generation rule of the OH in the environment through the dynamic information of the luminous signal change, and realize the rapid evaluation of the influence of the environmental conditions on the OH.
Description
Technical Field
The application belongs to the technical field of hydroxyl radical detection, and particularly relates to a portable chemiluminescent device for continuously detecting hydroxyl radicals on site.
Background
Hydroxyl radicals (. OH) are a highly reactive species that are prevalent in various types of environments and play an important role. In the atmosphere, OH controls the oxidizing power of the natural atmosphere, is one of the main driving forces for atmospheric cleaning, and is capable of degrading harmful organic pollutants and greenhouse gases. Meanwhile, OH can react with other substances in the atmosphere to generate a series of harmful compounds, which cause environmental problems such as photochemical smog, ozone pollution, haze and the like, and excessive OH can cause oxidative stress to organism cells, thereby affecting human health. In natural bodies of water, OH can decompose most contaminants such as organic compounds, inorganic compounds, bacteria, and the like. However, when too much OH is present in the water, they may also destroy organics and microorganisms in the water, resulting in water pollution and ecological imbalance. In soil, OH can participate in degradation and conversion of organic matter, but when too much OH is present in the soil, they may also destroy the soil environment, resulting in degradation of soil quality and breakdown of ecosystem. In summary, OH can play an important role in environmental clearance and decomposition, but may also generate oxidative stress that is harmful to human health. Therefore, the reliable analysis method is adopted to monitor the OH in the natural environment, and has important research significance for knowing the environmental quality, chemical reaction mechanism and environmental management of the atmosphere, the water body and the soil.
However, the high activity, short lifetime, low concentration and other characteristics of OH present a great challenge for the detection of OH. Although many OH detection methods such as electron spin resonance, fluorescence, chromatography, etc. have been developed, these methods have limitations. For example, these methods typically require complex capture and isolation procedures and specific experimental conditions, often requiring cumbersome steps and complex instrumentation, and the long time from sampling to detection does not reflect the true production of OH in the natural environment.
The chemiluminescence technology is a very sensitive, rapid and simple analysis technology, and can be used in various analysis and detection fields. Chemiluminescence is produced by a chemical reaction, typically an oxidation reaction, whereby the product that produces the excited state returns to the ground state by the emission of photons with the production of chemiluminescence, which is immediately released whenever a redox chemical reaction occurs when the two reagents are mixed. Therefore, chemiluminescent detection has the advantage of rapid response, and is very suitable for detecting chemically active species with short service lives such as active oxygen. In the prior art, some devices have been developed for detecting OH based on chemiluminescence technology. However, most of these devices are not portable, require use in a laboratory, are cumbersome to handle and manipulate, and do not meet the requirements of real-time detection. Based on this, there is a need for a portable OH detector with simple operation, good real-time performance and high specificity, so as to realize on-site continuous detection of OH.
Disclosure of Invention
The embodiment of the application aims at solving the problems existing in the prior art and provides a portable chemiluminescent device for continuously detecting hydroxyl radicals on site so as to realize the on-site continuous detection of OH in various environmental media. The device has portability and high sensitivity, can effectively detect the concentration of OH, and provides a convenient, quick, accurate and reliable method for environmental monitoring and research. In addition, the device has various environmental adaptations, can be widely applied to a plurality of environmental scenes such as air, water, soil and the like, helps people to better understand environmental quality, provides technical support for environmental protection and treatment, and has very strong practicality and popularization value.
The embodiment of the application provides a portable chemiluminescent device for continuously detecting hydroxyl radicals on site, which comprises a peristaltic pump, a mixing tank, a detection tank, a photomultiplier, a photon counter, a terminal and an instrument shell for packaging; the terminal is arranged outside the instrument shell, the other elements are arranged in the instrument shell, two oxidant inlets for respectively inputting two oxidants and a sample inlet for inputting a sample to be tested are arranged on the instrument shell, the peristaltic pump drives the sample to be tested and the oxidants to be conveyed to the mixing tank, the mixing tank mixes the sample to be tested and the two oxidants and inputs the mixture into the detection tank, chemiluminescence occurs in the detection tank, the photomultiplier converts optical signals generated in the detection tank into electrical signals, and the signals are transmitted to the terminal through the photon counter, so that the terminal displays the detection result of hydroxyl radicals.
Further, the portable mobile power supply is used for supplying power to the peristaltic pump, the photomultiplier, the photon counter and the terminal.
Further, a power supply power controller is arranged at the output end of the portable mobile power supply so as to control the output power.
Further, the sample to be tested and the two oxidants enter the mixing tank through a peristaltic pump.
Further, the two oxidants are respectively H 2 O 2 And K 5 Cu(HIO 6 ) 2 (Cu(III))。
Further, the detection tank is spiral and is provided with a waste liquid outlet.
The application also provides application of the device in on-site continuous detection of OH in the environment.
Further, if the OH in the air is detected, the air is introduced into the OH trapping agent solution with the preset concentration through an atmosphere sampler, and a sample to be detected is obtained.
Further, if OH in water or soil is detected, a predetermined concentration of OH capturing agent is added into the water or soil sample, and the sample to be detected is obtained after filtration.
Further, the OH scavenger is phthalhydrazide (Phth).
The portable chemiluminescent detection device can measure the OH generated in various environmental media such as air, water and soil, can realize the measurement of the OH generation behavior, and can research the generation rule of the OH in the environment through the dynamic information of luminescent signal change so as to realize the rapid evaluation of the influence of environmental conditions on the OH.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
the device encapsulates elements such as a photomultiplier, a photon counter, a small peristaltic pump and the like in the device through an instrument shell, realizes the integration of the device, greatly reduces the volume and the weight of the instrument, realizes the portability of an OH detection instrument in a natural environment, inputs an external sample to be detected and an external oxidant into the device through two oxidant inlets and a sample inlet on the instrument shell, forms 5-hydroxyphthalhydrazide (5-OH-Phth) with strong chemiluminescence property through the specific reaction of the phthalhydrazide and the OH, realizes the high-sensitivity and high-specificity on-site continuous detection of the OH in a field environment, and solves the problem of difficult on-site detection of the OH through in-situ capture and on-site detection of the OH. In the application of the device, the device can have various environmental adaptations through the coupling of the atmospheric sampler and the sample filtering device, can be applied to the on-site continuous detection of the OH in a plurality of environmental scenes such as the atmosphere, the water body, the soil and the like, realizes the measurement of the OH generation behavior, researches the generation rule of the OH in the environment through the dynamic information of the luminous signal change, and realizes the rapid evaluation of the influence of the environmental conditions on the OH.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of a portable chemiluminescent device for the continuous in situ detection of hydroxyl radicals, according to an exemplary embodiment, wherein (a) is an exterior view of the device; (b) is an internal view of the device.
Fig. 2 is a schematic diagram illustrating a portable chemiluminescent device for the continuous in situ detection of hydroxyl radicals in accordance with an exemplary embodiment.
FIG. 3 is a schematic diagram showing the results of detection performed using the portable chemiluminescent device for the continuous in situ detection of hydroxyl radicals of the present application according to an exemplary embodiment, wherein (a) is the concentration change of OH in air over 24 hours; (b) is the change in concentration of OH in the lake water over 24 hours; (c) is the concentration change of OH in the soil over 24 hours.
Wherein: 1. a terminal; 2. an instrument housing; 3. a photomultiplier tube; 4. a photon counter; 5. a peristaltic pump; 6. a power supply power controller; 7. a portable mobile power supply; 8. a waste liquid outlet; 9. an oxidant inlet; 10. a sample inlet.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
FIG. 1 is a pictorial diagram of a portable chemiluminescent device for the in situ continuous detection of hydroxyl radicals, as shown in FIG. 1 (a) and FIG. 1 (b), which may include a mixing cell, detection cell, photomultiplier tube 3, photon counter 4, terminal 1, and instrument housing 2 for packaging, in accordance with an exemplary embodiment; the terminal 1 is arranged outside the instrument housing 2, the rest elements are arranged in the instrument housing 2, two oxidant inlets 9 for respectively inputting two oxidants and a sample inlet 10 for inputting a sample to be detected are arranged on the instrument housing 2, the sample to be detected and the two oxidants are mixed and input into a detection tank by the mixing tank, chemiluminescence occurs in the detection tank, the photomultiplier 3 converts optical signals generated in the detection tank into electrical signals, and the electrical signals are transmitted to the terminal 1 through the photon counter 4, so that the terminal 1 displays the detection result of hydroxyl radicals.
In one embodiment, the material of the instrument housing 2 is aluminum alloy, which increases the strength of the instrument for field operation.
Specifically, the sample to be tested and the two oxidants enter the mixing tank through the peristaltic pump 5, and the three are uniformly mixed therein. In one embodiment, the two oxidants are each H 2 O 2 And K 5 Cu(HIO 6 ) 2 (Cu (III)) has proven to be relatively insensitive to a range of disturbances that may be encountered in complex environmental systems.
Specifically, the detection tank is spiral and is provided with a waste liquid outlet 8, a sample to be detected and two oxidants flow into the spiral detection tank immediately after entering the mixing tank through the peristaltic pump 5, chemiluminescence is immediately generated and captured by the photomultiplier 3, and waste liquid flows out of the detection tank from the waste liquid outlet 8, so that continuous flow analysis is realized.
Specifically, the device may further include a portable mobile power supply 7, where the portable mobile power supply 7 is configured to supply power to the photomultiplier tube 3, the photon counter 4, the peristaltic pump 5 and the terminal 1, and an output end of the portable mobile power supply 7 may be provided with a power supply power controller 6 to control output power, so as to implement stable operation of the photomultiplier tube 3 and the photon counter 4.
In an embodiment, a tablet computer is selected as the terminal 1 in consideration of portability of the device.
FIG. 2 is a schematic diagram of a portable chemiluminescent device for the continuous in situ detection of hydroxyl radicals according to an exemplary embodiment, as shown in FIG. 2, wherein the method and principle of operation of the device are as follows: firstly, adding phthalic dihydrazide with a certain concentration into the testIn the sample, in situ capturing of OH generated by the sample, generating stable 5-hydroxyphthalhydrazide with strong chemiluminescence properties, and delivering the stable 5-hydroxyphthalhydrazide to a mixing tank through a peristaltic pump 5, and simultaneously two oxidants H 2 O 2 And Cu (III) are sent into a mixing tank to be mixed with a sample to be detected, then flow into a spiral detection tank, in a strong alkaline medium, chemiluminescence is immediately generated when 5-hydroxyphthalhydrazide reacts with a strong oxidant, then the mixture is captured and converted into an electric signal by a photomultiplier tube 3 under the detection tank, and the electric signal is further transmitted to a point computer terminal 1 through a photon counter 4. The reaction separates the capturing process of the hydroxyl radical from the chemiluminescent reaction process, and realizes the in-situ capturing and continuous detection of the hydroxyl radical.
The application also provides application of the device in on-site continuous detection of OH in various environments of air, water and soil.
Specifically, if OH in the air is detected, introducing the air into an OH trapping agent solution with a certain concentration through a constant-current atmospheric sampler to obtain a sample to be detected; if the OH in the water or the soil is detected, the water or the soil sample is added with the OH trapping agent with a certain concentration, and the sample to be detected is obtained after filtering. In the application, the OH trapping agent is phthalhydrazide (Phth) which can trap OH in situ to be converted into a stable chemiluminescent product. The capture reagent in the present detection system needs to be in excess, and for this reason the applicant has tried different concentrations of capture reagent, the best chemiluminescent signal can be achieved at 50. Mu.M, so the subsequent examples were all performed with 50. Mu.M Phth.
In one embodiment, different concentrations of capture agents are tried, and an optimal chemiluminescent signal is achieved at 50. Mu.M. Therefore, 50 μm of Phth was used as a capturing agent for gas phase OH, and chemiluminescent detection was performed after 1.0h of collection was performed at different time points within 24h using a constant flow atmospheric sampler. As shown in FIG. 3 (a), the concentration of OH in air is very low between 0 and 7 points, and after 8 points, the OH concentration starts to increase to 14 points to reach the peak value, and then starts to decrease, and after 17 points gradually increase, the OH concentration decreases to the lowest point concentration at midnight.
In one example, detection of OH in surface water was performed, 5.0mL of lake water was taken every 1.0h at a fixed position in the lake, 50. Mu.M of Phth was added and fixed at the sampling site to ensure that the same reaction conditions were followed by chemiluminescent detection for 2.0 min. As shown in FIG. 3 (b), OH in the lake water hardly generates OH between 0 and 6. As the peak value increases to 12 after 6. As a result, it starts to decrease, and it hardly generates after 19 pm. It is noted that the change condition of OH in the lake water within 24 hours is consistent with the change rule of sunlight intensity corresponding to the change point. This accords with the law of photochemistry production of OH in surface water.
In another example, the detection of OH in soil is carried out, 2.0mL of soil is taken every 1.0h at the fixed position of the seashore, 50 mu M Phth is added, the soil is fixed at the sampling site to ensure the same reaction condition, the reaction is carried out for 2.0min, the filtration is carried out, the filtrate is diluted by 2.0 times, and then the chemiluminescence detection is carried out. As shown in fig. 3 (c), the concentration of OH in the soil is high after ebb and tends to decrease with time, and after ebb and flow, OH is hardly generated due to no oxygen contact, and when the tide water is returned again, the OH concentration immediately rises to the highest, and then gradually decreases. The results are in accordance with the law of coastal tide-mediated active oxygen generation.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof.
Claims (10)
1. A portable chemiluminescent device for the continuous in situ detection of hydroxyl radicals comprising peristaltic pumps, a mixing tank, a detection tank, photomultiplier tubes, photon counters, terminals and an instrument housing for packaging; the terminal is arranged outside the instrument shell, the other elements are arranged in the instrument shell, two oxidant inlets for respectively inputting two oxidants and a sample inlet for inputting a sample to be tested are arranged on the instrument shell, the peristaltic pump drives the sample to be tested and the oxidants to be conveyed to the mixing tank, the mixing tank mixes the sample to be tested and the two oxidants and inputs the mixture into the detection tank, chemiluminescence occurs in the detection tank, the photomultiplier converts optical signals generated in the detection tank into electrical signals, and the signals are transmitted to the terminal through the photon counter, so that the terminal displays the detection result of hydroxyl radicals.
2. The device of claim 1, further comprising a portable power source for powering the peristaltic pump, photomultiplier tube, photon counter, and terminal.
3. The apparatus of claim 2, wherein the output of the portable power source is provided with a power source power controller for controlling the output power.
4. The device of claim 1, wherein the sample to be tested and the two oxidants enter the mixing reservoir by peristaltic pumps.
5. The apparatus of claim 1, wherein the two oxidants are each H 2 O 2 And K 5 Cu(HIO 6 ) 2 。
6. The device according to claim 1, wherein the detection cell is spiral and provided with a waste outlet.
7. Use of the device of any one of claims 1-6 for in-situ continuous detection of OH in an environment.
8. The use according to claim 7, wherein if the presence of OH in air is detected, air is introduced into a predetermined concentration of OH scavenger solution by means of an atmospheric sampler to obtain the sample to be tested.
9. The use according to claim 7, wherein the sample to be tested is obtained by adding a predetermined concentration of OH scavenger to a water or soil sample and filtering if OH in the water or soil is detected.
10. The use according to claim 8 or 9, wherein the OH scavenger is phthalhydrazide.
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| CN202310615401.7A CN116593449A (en) | 2023-05-29 | 2023-05-29 | Portable chemiluminescent device for continuously detecting hydroxyl radicals in situ |
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| CN202310615401.7A CN116593449A (en) | 2023-05-29 | 2023-05-29 | Portable chemiluminescent device for continuously detecting hydroxyl radicals in situ |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118275485A (en) * | 2024-03-05 | 2024-07-02 | 中国科学院合肥物质科学研究院 | Liquid phase free radical real-time in-situ detection device and detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118275485A (en) * | 2024-03-05 | 2024-07-02 | 中国科学院合肥物质科学研究院 | Liquid phase free radical real-time in-situ detection device and detection method thereof |
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