CN111665205A - Optical sensor for detecting formaldehyde content in milk - Google Patents
Optical sensor for detecting formaldehyde content in milk Download PDFInfo
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- CN111665205A CN111665205A CN202010489306.3A CN202010489306A CN111665205A CN 111665205 A CN111665205 A CN 111665205A CN 202010489306 A CN202010489306 A CN 202010489306A CN 111665205 A CN111665205 A CN 111665205A
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- detecting
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- formaldehyde content
- formaldehyde
- milk
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 235000013336 milk Nutrition 0.000 title claims abstract description 47
- 239000008267 milk Substances 0.000 title claims abstract description 47
- 210000004080 milk Anatomy 0.000 title claims abstract description 47
- 230000003287 optical effect Effects 0.000 title abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000013460 polyoxometalate Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 239000003599 detergent Substances 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 238000000862 absorption spectrum Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 11
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical group CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011005 laboratory method Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000002371 ultraviolet--visible spectrum 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
- 208000014085 Chronic respiratory disease Diseases 0.000 description 1
- 206010009944 Colon cancer Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000012901 Milli-Q water Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 208000002454 Nasopharyngeal Carcinoma Diseases 0.000 description 1
- 206010061306 Nasopharyngeal cancer Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 208000029742 colonic neoplasm Diseases 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 201000011216 nasopharynx carcinoma Diseases 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000020183 skimmed milk Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 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
Abstract
The invention discloses an optical sensor for detecting formaldehyde content in milk, which comprises an optical fiber 1, a middle cavity 2 and a convex lens 3. The end of the optical fiber 1 is coated with a polyoxometallate film 4. The top of the middle cavity 2 is provided with an open slot, and the bottom of the middle cavity is provided with an exhaust hole. The liquid to be detected is injected into the middle cavity 2 from the open slot at the top, and flows out from the vent hole at the bottom of the middle cavity after the detection is finished. The formaldehyde in the liquid to be detected reacts with the polyoxometallate film 4, so that the light penetrating through the polyoxometallate film is changed, and the content of the formaldehyde in the milk can be indirectly and quantitatively detected by detecting the ultraviolet-visible absorption spectrum of the light penetrating through the polyoxometallate film through a spectrophotometer. The data obtained by detecting the formaldehyde content by using the optical sensor is accurate and reliable, a heating link in the traditional formaldehyde detection method is omitted, and the method has good practical application value.
Description
Technical Field
The invention relates to the technical field of milk detection, in particular to an optical sensor for detecting formaldehyde content in milk.
Background
Milk known as 'white blood' is rich in mineral substances, calcium, phosphorus, iron, zinc, copper, manganese and molybdenum. The milk is the best source of calcium for human body, and the proportion of calcium and phosphorus is proper, thus being beneficial to the absorption of calcium.
Formaldehyde is very effective in inhibiting microbial growth and extending the shelf life of the product. Formaldehyde is added not only to milk for human consumption but also to skimmed milk for animal husbandry. Although formaldehyde is a natural metabolite in humans, high dose exposure increases the risk of acute poisoning, and chronic respiratory diseases, nasopharyngeal carcinoma, colon cancer, etc. may be caused by chronic exposure to low doses of formaldehyde.
The existing milk adulteration analysis and detection methods are mostly based on the spectroscopy technology, and although the methods have high sensitivity, the detection equipment is expensive. Chinese patent (patent publication No. CN 110849945A) A method for rapid nondestructive testing of milk properties and milk adulterants, which utilizes an open coaxial probe combined with a vector network analyzer to measure S parameters of milk, designs a quasi-static model method to analyze and calculate the S parameters, and finally obtains the dielectric constant of a substance. And (3) detecting the properties of the milk and the milk adulteration substance by using the dielectric constant change curve of the milk. The method is easy to cause the reduction of the test accuracy due to the mutual interference of substances in the milk, and simultaneously has higher cost. Another approach is to detect one or a class of adulterants. Chinese patent (patent publication No. CN 107219284A) discloses a method for detecting milk adulteration by a fluorine ion electrode, which overcomes the defect of complex milk adulteration detection process and provides a method for detecting milk adulteration by a fluorine ion electrode. Chinese patent (patent publication No. CN 105588925A) A method for rapidly identifying and detecting milk adulteration realizes the detection of milk water by collecting the fingerprint of a milk sample to be detected and identifying the milk sample to be detected by adopting a qualitative identification model. The patent statement for detecting one or a plurality of adulterants can not realize the detection of the formaldehyde content in the milk. A commonly used method for measuring formaldehyde content is acetylacetone spectrophotometry. In an ammonium acetate buffer solution with the pH =6, formaldehyde reacts with acetylacetone under the condition of boiling water bath to quickly generate a stable yellow compound; the method is a laboratory method, and simultaneously needs boiling water bath heating, so that potential safety hazards exist, and the method has great limitation.
The method aims to solve the problem that the detection cost of the milk adulteration based on the spectroscopy technology is high; the invention discloses an optical sensor for detecting formaldehyde content, which has higher requirement on the test environment and certain danger. The optical sensor is utilized to test the formaldehyde content, the heating link in the traditional method for detecting the formaldehyde content can be omitted, and the method has the advantages of simple operation, low cost, high detection speed and high efficiency, and reduces the requirement on detection equipment.
Disclosure of Invention
Technical problem to be solved
In order to solve the technical problem, the invention provides a sensor for detecting the content of formaldehyde in milk. The sensor has the advantages of simple operation, low cost, high detection speed and high efficiency, and solves the problems that the methods for detecting the formaldehyde content in the milk in the prior art are laboratory methods, boiling water bath heating is needed, and potential safety hazards exist.
(II) technical scheme
The technical scheme of the invention is that a sensor is designed on the basis of a polyoxometallate film which is insoluble in water and can react with trace formaldehyde in a solution, the content of the formaldehyde in the solution is indirectly detected by utilizing the change of light penetrating through the sensor along with the content of the formaldehyde in the solution, and the sensor comprises optical fibers 1 and 6, a middle cavity 2, a convex lens 3, a polyoxometallate film 4 and an SMA adapter 5.
Preferably, the core at the end of the optical fiber 1 is bare.
Preferably, the bare core end of the optical fiber 1 is washed.
Preferably, the bare core end of the optical fiber 1 is coated with a polyoxometalate film 4.
Preferably, the polyoxometalate film 4 is insoluble in water.
Preferably, the polyoxometalate film 4 is capable of reacting with formaldehyde in solution.
Preferably, the middle cavity 2 is made of a polymer material with stable chemical properties.
Preferably, the top of the middle cavity 2 is provided with an open slot, and the bottom is provided with an exhaust hole.
Preferably, the open slots at the top and the vent holes at the bottom of the middle chamber 2 need to be closed by threaded plugs during the test.
Preferably, the liquid to be detected is injected from an open slot of the middle cavity 2.
Preferably, the liquid to be detected is discharged from the vent hole of the middle cavity 2 after being detected.
Preferably, the middle chamber 2 is washed with a special detergent before and after the detection.
Preferably, the convex lens 3 focuses the light transmitted through the polyoxometalate film 4 on the optical fiber 6.
Preferably, the SMA adapter 5 is connected to a light source.
Preferably, the optical fiber 6 is connected to a spectrophotometer.
Advantageous effects
Compared with the prior art, the invention provides a sensor for detecting formaldehyde in milk, which has the following beneficial effects:
1. the optical sensor has better sensitivity and accuracy;
2. compared with a common acetylacetone spectrophotometry for detecting formaldehyde, the optical sensor has the advantages that the heating step is omitted, the safety is better, the requirement on detection equipment is reduced, and the applicability is wider.
3. The optical sensor has better performance stability.
Drawings
FIG. 1 is a schematic structural diagram of an optical sensor for detecting formaldehyde content in milk
FIG. 2 is a schematic diagram of the operation of an optical sensor for detecting the formaldehyde content in milk
FIG. 3 shows the UV-VIS absorption spectrum measured according to the specific embodiment
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Preparation of polyoxometallate ([ (C)4H9)4N]4H[PMo10V2O40]) 0.40 g of tetra-n-butylammonium bromide (C)16H36BrN) and 0.40 g of polyoxometalate (H)5[PMo10V2O40]·11H2O) was dissolved in 10 mL of aqueous solution and the reaction yielded an orange solid. The suspension was stirred for 1 hour, then the solid was filtered off, washed with four 5 mL portions of water and dried in a vacuum desiccator. Preparing sensitive membrane solution by mixing polyvinyl chloride (PVC) (33%), o-nitro octyl ether (NPOE) (66%) and [ (C)4H9)4N]4H [PMo10V2O40](1%) was mixed in 1 mL of Tetrahydrofuran (THF) and reacted to form a sensitive membrane that reacted with formaldehyde in solution. And (3) treating a base material, namely removing an outer coating from the tail end of the optical fiber 1 with a pure fused silica core of 600 mu m by using a blade, and removing a cladding by using a longitudinal optical fiber stripping clamp to expose the core for 3 mm. And (3) coating the fiber core of the optical fiber, cleaning the bare fiber core by using ethanol, immersing the bare fiber core into a film solution, taking out and drying for 12 hours in a natural state. The middle chamber 2 is prepared, and the middle chamber 2 with the capacity of 1.5 mm is prepared by polyether ether ketone (PEEK). And (3) transmitting light, namely, focusing the light penetrating through the oxometallate film by using a convex lens 7 with the focal length of 30 mm, and transmitting the focused light to a spectrophotometer by using another optical fiber 6.
The device is connected according to the method shown in figure 2, and the optical sensor is used for detecting the content of formaldehyde in the milk. And stabilizing the light source 7, and turning on the deuterium lamp 7 and standing for 30 min. Instrument calibration, spectrophotometer 8 was calibrated using fiber 1 in the middle chamber 2 with zero transmission measured in the dark setting and 100% transmission measured with uncoated fiber. And (3) carrying out coating treatment on the fiber core of the optical fiber, taking out the optical fiber 1, coating the tail end fiber core of the optical fiber, drying the optical fiber in air for 12 h, and then putting the optical fiber into the middle cavity 2. And (3) sample detection, namely pouring the liquid to be detected into an open top slot in the middle cavity 2 by using a Pasteur pipette under the condition that the bottom vent hole is closed, and closing the top of the middle cavity by using a threaded plug. The UV-visible absorption spectrum (in absorbance units) is preserved after stabilization. After the measurement, the middle chamber 2 is opened, the top and bottom screw plugs are unscrewed, and the liquid to be measured is emptied by gravity. The inner wall of the middle chamber was washed with ultrapure water Milli-Q water between the analyses of the two solutions to be tested.
FIG. 3 shows the UV-VIS absorption spectrum measured by the above-described method. The prepared optical sensor has obvious response to the formaldehyde content in the solution, and the absorbance is reduced along with the increase of the formaldehyde content in the solution.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (15)
1. The invention provides a sensor for detecting formaldehyde in milk, which comprises optical fibers 1 and 6, a middle cavity 2, a convex lens 3, a polyoxometallate film 4 and an SMA adapter 5.
2. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the fiber core at the tail end of the optical fiber 1 is exposed.
3. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the bare core end of the optical fiber 1 needs to be washed.
4. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the bare core end of the optical fiber 1 needs to be coated with a polyoxometallate film 4.
5. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the polyoxometalate film 4 is insoluble in water.
6. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the polyoxometalate film 4 is capable of reacting with formaldehyde in solution.
7. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the middle cavity 2 is made of a high polymer material with stable chemical properties.
8. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the top of the middle cavity 2 is provided with an open slot, and the bottom is provided with an exhaust hole.
9. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the open slot at the top of the middle cavity 2 and the vent hole at the bottom need to be closed by screw thread plugs in the detection process.
10. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the liquid to be detected is injected from an open slot of the middle cavity 2.
11. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: and the liquid to be detected is discharged from the exhaust hole of the middle cavity 2 after being detected.
12. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the middle chamber 2 needs to be washed with a special detergent before and after the detection.
13. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the convex lens 3 focuses the light transmitted through the polyoxometalate film 4 on the optical fiber 6.
14. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: and the SMA connecting port 5 is connected with a light source.
15. The sensor for detecting the formaldehyde content in the milk according to claim 1, is characterized in that: the optical fiber 6 is connected with a spectrophotometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489306.3A CN111665205A (en) | 2020-06-02 | 2020-06-02 | Optical sensor for detecting formaldehyde content in milk |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489306.3A CN111665205A (en) | 2020-06-02 | 2020-06-02 | Optical sensor for detecting formaldehyde content in milk |
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| CN111665205A true CN111665205A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010489306.3A Pending CN111665205A (en) | 2020-06-02 | 2020-06-02 | Optical sensor for detecting formaldehyde content in milk |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665278A (en) * | 2020-06-02 | 2020-09-15 | 李锦安 | Hydrogen sulfide gas sensor for medical inspection waste pre-alarming |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665021A (en) * | 2016-01-11 | 2016-06-15 | 吉林省东成环保集团有限公司 | Formaldehyde degradation catalyst |
-
2020
- 2020-06-02 CN CN202010489306.3A patent/CN111665205A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665021A (en) * | 2016-01-11 | 2016-06-15 | 吉林省东成环保集团有限公司 | Formaldehyde degradation catalyst |
Non-Patent Citations (3)
| Title |
|---|
| MARTA I.S. VERÍSSIMO ET AL.: "A new formaldehyde optical sensor: Detecting milk adulteration", 《FOOD CHEMISTRY》 * |
| 丁元生 等: "Keggin型配合物H5PMo(10)V2O(40)催化剂催化氧化反应研究", 《吉林化工学院学报》 * |
| 谢乐芳 等: "6种多金属氧酸盐的抑菌作用", 《应用化学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665278A (en) * | 2020-06-02 | 2020-09-15 | 李锦安 | Hydrogen sulfide gas sensor for medical inspection waste pre-alarming |
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