CN113884482A - Formaldehyde self-testing box with biological cellulose membrane as reagent carrier - Google Patents
Formaldehyde self-testing box with biological cellulose membrane as reagent carrier Download PDFInfo
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- CN113884482A CN113884482A CN202010625130.XA CN202010625130A CN113884482A CN 113884482 A CN113884482 A CN 113884482A CN 202010625130 A CN202010625130 A CN 202010625130A CN 113884482 A CN113884482 A CN 113884482A
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- formaldehyde
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 229920002678 cellulose Polymers 0.000 title claims abstract description 62
- 239000001913 cellulose Substances 0.000 title claims abstract description 62
- 239000003153 chemical reaction reagent Substances 0.000 title claims abstract description 54
- 239000012528 membrane Substances 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 238000011161 development Methods 0.000 claims abstract description 17
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N hydrochloric acid Substances Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- 239000012153 distilled water Substances 0.000 claims description 10
- PHOLIFLKGONSGY-CSKARUKUSA-N (e)-(3-methyl-1,3-benzothiazol-2-ylidene)hydrazine Chemical group C1=CC=C2S\C(=N\N)N(C)C2=C1 PHOLIFLKGONSGY-CSKARUKUSA-N 0.000 claims description 9
- FPFSGDXIBUDDKZ-UHFFFAOYSA-N 3-decyl-2-hydroxycyclopent-2-en-1-one Chemical compound CCCCCCCCCCC1=C(O)C(=O)CC1 FPFSGDXIBUDDKZ-UHFFFAOYSA-N 0.000 claims description 9
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical group [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 229910001447 ferric ion Inorganic materials 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000012445 acidic reagent Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000007865 diluting Methods 0.000 claims description 3
- XGGLLRJQCZROSE-UHFFFAOYSA-K ammonium iron(iii) sulfate Chemical group [NH4+].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O XGGLLRJQCZROSE-UHFFFAOYSA-K 0.000 claims description 2
- 239000012916 chromogenic reagent Substances 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 238000004737 colorimetric analysis Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 4
- -1 floors Substances 0.000 description 4
- 230000000711 cancerogenic effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 231100000357 carcinogen Toxicity 0.000 description 2
- 239000003183 carcinogenic agent Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000032839 leukemia Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- OEZPVSPULCMUQB-UHFFFAOYSA-N (3-methyl-1,3-benzothiazol-3-ium-2-yl)hydrazine;chloride Chemical compound Cl.C1=CC=C2SC(=NN)N(C)C2=C1 OEZPVSPULCMUQB-UHFFFAOYSA-N 0.000 description 1
- 235000002837 Acetobacter xylinum Nutrition 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229920002749 Bacterial cellulose Polymers 0.000 description 1
- 208000003174 Brain Neoplasms Diseases 0.000 description 1
- 208000031404 Chromosome Aberrations Diseases 0.000 description 1
- 208000014085 Chronic respiratory disease Diseases 0.000 description 1
- 206010009944 Colon cancer Diseases 0.000 description 1
- 206010067477 Cytogenetic abnormality Diseases 0.000 description 1
- 230000005778 DNA damage Effects 0.000 description 1
- 231100000277 DNA damage Toxicity 0.000 description 1
- 206010064571 Gene mutation Diseases 0.000 description 1
- 241000589232 Gluconobacter oxydans Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241001136169 Komagataeibacter xylinus Species 0.000 description 1
- 208000019255 Menstrual disease Diseases 0.000 description 1
- 208000002454 Nasopharyngeal Carcinoma Diseases 0.000 description 1
- 206010061306 Nasopharyngeal cancer Diseases 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 239000005016 bacterial cellulose Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 210000003855 cell nucleus Anatomy 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 208000029742 colonic neoplasm Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 231100000171 higher toxicity Toxicity 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 201000011216 nasopharynx carcinoma Diseases 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000003403 water pollutant Substances 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
- 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
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
Landscapes
- Physics & Mathematics (AREA)
- 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 Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention relates to a formaldehyde self-testing kit with a biological cellulose membrane as a reagent carrier, which comprises a biological cellulose reaction membrane, a biological cellulose color development membrane, a color comparison card and an instruction book, wherein the biological cellulose reaction membrane and the biological cellulose color development membrane are respectively and independently packaged. The formaldehyde concentration was determined using a phenol reagent colorimetry. When in use, the reaction film sheet is only required to be opened for independent packaging, and the reaction film sheet is attached to the color development film sheet which is opened for independent packaging after being exposed for a period of time. The formaldehyde self-testing box does not need a reagent bottle and a reaction box, is convenient to operate and is not easy to leak; the biological cellulose membrane has good protection effect on the reagent, can keep the reagent stable and effective after long-term storage, and can also greatly reduce the dosage of the reagent and the packaging cost.
Description
Technical Field
The invention relates to the technical field of formaldehyde detection, in particular to a formaldehyde self-testing box taking a biological cellulose membrane as a reagent carrier.
Background
Formaldehyde, a recognized chemical substance with higher toxicity, is highly ranked second on the priority control list of toxic chemicals in China. It is usually a colorless irritant gas of the formula HCHO or CH2O, molecular weight 30.00, also known as formil, has stimulating effect on human eyes, nose, etc. In 2017, 10 and 27, in a carcinogen list published by the international cancer research institution of the world health organization, formaldehyde is put in a carcinogen list. In 2019, 7 and 23, formaldehyde is listed in the list of toxic and harmful water pollutants (first batch). Chronic respiratory diseases, nasopharyngeal carcinoma, colon cancer, brain tumor, menstrual disorder, gene mutation of cell nucleus, DNA single-strand internal cross-linking, DNA and protein cross-linking, repair of DNA damage inhibition, pregnancy syndrome, chromosome abnormality of newborn, leukemia, and memory and intelligence deterioration of teenagers caused by long-term exposure to low-dose formaldehyde. Among all the contacters, children and pregnant women are particularly sensitive to formaldehyde and are more harmful. And (3) statistically displaying according to related data: the human being has 70% of the diseasesRelated to indoor environment, 12 tens of thousands of people die from indoor pollution every year in China, and more than 90% of children leukemia patients live into new decorated rooms and suffer from diseases within one year.
However, the formaldehyde has wide application, belongs to a popular chemical product with simple production process and sufficient raw material supply, and has important application in many fields such as chemical industry, wood industry, textile industry and the like. For the ordinary consumers, the formaldehyde can be contained in furniture, plates, paints, floors, textiles and even food and beverage, which seriously threatens the health of people. In addition, formaldehyde is often considered to be a sub-toxic or chronic toxic hazard to human bodies or a mutagenic or carcinogenic hazard caused by long-term contact, so that it is necessary to provide a convenient and rapid detection kit for detecting the concentration or content of formaldehyde in the air.
The colorimetric method is a detection method commonly adopted in the existing formaldehyde self-detection box due to simplicity and rapidness, and is mainly used for detecting the content of formaldehyde by changing the color of a reagent through a chemical reaction, wherein the most common method is a phenol reagent colorimetric method which expresses the content of formaldehyde through the shade of blue, and the basic principle is as follows: a phenol reagent (hydrochloric acid-3-methyl-2-benzothiazolone hydrazone, abbreviated as MBTH) is used as a reactant and is contacted with formaldehyde to generate an oxazine compound, and the oxazine compound is oxidized by ferric ions in an acidic solution to generate a blue-green compound (di-condensed formaldehyde-3-methyl-2-benzothiazolone hydrazone), and then the quantification is carried out according to color comparison.
The biological cellulose membrane is a natural cellulose product produced by metabolism of bacteria such as acetobacter xylinum and acetobacter gluconicum, is also called as bacterial cellulose, does not contain lignin, colloid and hemicellulose, and is a natural biological cellulose product with high purity. The biological cellulose membrane has a three-dimensional space reticular structure with high crystallinity, high polymerization degree and superfine, so that the biological cellulose membrane has super-strong water holding capacity, excellent mechanical property and excellent degradability and biocompatibility. Has wide application in the fields of food, medicine, material and the like. The production of biological cellulose membranes is now industrialized, and it is usually a wet membrane prepared by static fermentation culture using agricultural waste or the like as a main material of a culture medium, and can be rehydrated by drying.
The current formaldehyde detection kit generally comprises a vial A containing a reactant (phenolic reagent), a vial B containing a color developing agent (acidic ferric iron), a reaction kit (with auxiliary components), a color comparison card and an instruction book. When the kit is used, a reactant needs to be poured into the reaction box firstly, the reaction box is exposed in a detection environment or a detection sample is added for reaction, after the reaction is finished, the color developing agent is added into the reaction box for color development, and after the color development is finished, the content of formaldehyde is determined by color comparison with a color comparison card. However, in such a detection kit, the reagent is contained in a small bottle, and the stability of the solvent is easy to cause problems when the storage time is long, so that the detection result is inaccurate; the small bottles are not convenient enough in transportation and use, are easy to leak and need to be poured after the reaction is finished; for light sensitive reagents, such as the phenol reagent MBTH, special brown vials are also needed to keep out of the light; it is also necessary to provide a reaction cassette for holding reagents, which increases the manufacturing cost.
Disclosure of Invention
Aiming at the defects, the invention provides a formaldehyde test kit with a biological cellulose membrane as a reagent carrier, which comprises a biological cellulose reaction membrane and a biological cellulose color development membrane which are respectively and independently packaged, a color comparison card and an instruction.
For the formaldehyde test kit, the reaction reagent for detecting formaldehyde is wrapped in the biological cellulose reaction film, and the color reagent for detecting formaldehyde is wrapped in the biological cellulose color development film.
The reaction reagent is preferably a phenolic reagent; the color reagent is preferably a ferric ion acidic reagent.
Most preferably, the phenolic agent of the present invention is an MBTH agent; the ferric ion acidic reagent is an ammonium ferric sulfate hydrochloric acid reagent.
The independent package is formed by wrapping a biological cellulose reaction film and a biological cellulose color development film respectively by using plastic films and sealing and packaging.
The biological cellulose reaction membrane and the biological cellulose color development membrane are prepared by the following methods:
1) drying the wet biological cellulose membrane until the water content is lower than 50% for later use;
2) preparing MBTH solution with the concentration of 0.05-0.3mol/L by using distilled water as reaction solution for later use;
3) weighing 2.5-15g of ferric ammonium sulfate, dissolving with concentrated hydrochloric acid, and diluting with distilled water to 500ml to obtain a color development solution for later use;
4) respectively soaking the wet biological cellulose membrane prepared in the step 1) in the reaction solution and the color developing solution prepared in the step 2) and the step 3) for 20-40 min;
5) and taking out the wet film pieces, draining, and respectively and independently sealing and packaging.
The drying of the wet biological cellulose membrane in the step 1) can be realized by mechanical compression drying and low-temperature hot air drying, and the mechanical compression drying is preferably used.
When the formaldehyde test box with the biological cellulose membrane as the carrier is used, firstly, the sealed package of the biological cellulose reaction membrane is disassembled, the biological cellulose reaction membrane is exposed in a detection environment for 30-60 minutes, then, the biological cellulose color development membrane is disassembled and attached to the biological cellulose reaction membrane, and the biological cellulose color development membrane is compared with a color comparison card after 10-15 minutes to detect the concentration of formaldehyde.
The invention takes the biological cellulose membrane as a reagent carrier, does not need a reagent bottle and a reaction box, is convenient to operate and is not easy to leak; the biological cellulose membrane has good protection effect on the reagent, can keep the reagent stable and effective after long-term storage, and can also greatly reduce the dosage of the reagent and the packaging cost.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the invention in any way, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall be included in the protection of the present invention.
Example 1
Drying the wet biological cellulose membrane by mechanical compression until the water content is 40%;
preparing 0.1mol/L MBTH solution by using distilled water as a reaction reagent; weighing 3g of ferric ammonium sulfate, dissolving with concentrated hydrochloric acid, and diluting with distilled water to 500ml to be used as a color reagent;
then soaking the wet biological cellulose membrane with the water content of 40% in the reaction reagent and the color reagent respectively for 30 minutes;
taking out, draining, and sealing and packaging with plastic films;
and packaging the test paper with a color comparison card and a specification to prepare the formaldehyde self-testing box.
Example 2
Drying the wet biological cellulose membrane by mechanical compression until the water content is 45%;
preparing 0.15mol/L MBTH solution by using distilled water as a reaction reagent; weighing 5g of ferric ammonium sulfate, dissolving the ferric ammonium sulfate with concentrated hydrochloric acid, and adding distilled water to dilute the ferric ammonium sulfate to 500ml to be used as a color reagent;
then soaking the wet biological cellulose membrane with the water content of 45% in the reaction reagent and the color reagent respectively for 25 minutes;
taking out, draining, and sealing and packaging with plastic films;
and packaging the test paper with a color comparison card and a specification to prepare the formaldehyde self-testing box.
Example 3
Drying the wet biological cellulose membrane by mechanical compression until the water content is 35 percent;
preparing 0.25mol/L MBTH solution by using distilled water as a reaction reagent; weighing 10g of ferric ammonium sulfate, dissolving the ferric ammonium sulfate with concentrated hydrochloric acid, and adding distilled water to dilute the ferric ammonium sulfate to 500ml to be used as a color reagent;
then soaking the wet biological cellulose membrane with the water content of 35% in the reaction reagent and the color reagent respectively for 25 minutes;
taking out, draining, and sealing and packaging with plastic films;
and packaging the test paper with a color comparison card and a specification to prepare the formaldehyde self-testing box.
The formaldehyde self-testing box product takes the biological cellulose membrane as a reagent carrier, does not need a reagent bottle and a reaction box, is convenient to operate and is not easy to leak; the biological cellulose membrane has good protection effect on the reagent, can keep the reagent stable and effective after long-term storage, and can also greatly reduce the dosage of the reagent and the packaging cost. Has great market application value.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (8)
1. A formaldehyde self-test box with a biological cellulose membrane as a reagent carrier is characterized in that: the color comparison card consists of a biological cellulose reaction diaphragm, a biological cellulose color development diaphragm, a color comparison card and an instruction which are respectively and independently packaged.
2. The formaldehyde self-testing cassette of claim 1, wherein: the biological cellulose reaction membrane is formed by wrapping a reaction reagent with a biological cellulose wet membrane, and the biological cellulose chromogenic membrane is formed by wrapping a chromogenic reagent with a biological cellulose wet membrane.
3. The formaldehyde self-testing cassette of claim 2, wherein: the reaction reagent is a phenol reagent; the color reagent is a ferric ion acid reagent.
4. The formaldehyde self-testing cassette of claim 3, wherein: the phenol reagent is MBTH reagent; the ferric ion acidic reagent is an ammonium ferric sulfate hydrochloric acid reagent.
5. The formaldehyde self-testing cassette of claim 1, wherein: the independent package is a sealed package after the biological cellulose reaction membrane and the biological cellulose color developing membrane are respectively wrapped by plastic films.
6. The formaldehyde self-testing cassette of claim 4, wherein: the biological cellulose reaction membrane and the biological cellulose color development membrane are prepared by the following methods:
drying the wet biological cellulose membrane until the water content is lower than 50% for later use;
preparing MBTH solution with the concentration of 0.05-0.3mol/L by using distilled water as reaction solution for later use;
weighing 2.5-15g of ferric ammonium sulfate, dissolving with concentrated hydrochloric acid, and diluting with distilled water to 500ml to obtain a color development solution for later use;
respectively soaking the wet biological cellulose membrane prepared in the step 1) in the reaction solution and the color developing solution prepared in the step 2) and the step 3) for 20-40 min;
and taking out the wet film pieces, draining, and respectively and independently sealing and packaging.
7. The formaldehyde self-testing cassette of claim 6, wherein: the drying of the biological cellulose wet film sheet in the step 1) adopts mechanical compression drying.
8. A method of determining the concentration of formaldehyde in an environment using the formaldehyde self-test cartridge of any one of claims 1-7, wherein: the independent sealed package of the biological cellulose reaction membrane is firstly unpacked, the biological cellulose reaction membrane is exposed in a detection environment for 30-60 minutes, then the biological cellulose color development membrane is unpacked and is attached to the biological cellulose reaction membrane, and the biological cellulose color development membrane is compared with a color comparison card after 10-15 minutes to detect the concentration of formaldehyde.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010625130.XA CN113884482A (en) | 2020-07-02 | 2020-07-02 | Formaldehyde self-testing box with biological cellulose membrane as reagent carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010625130.XA CN113884482A (en) | 2020-07-02 | 2020-07-02 | Formaldehyde self-testing box with biological cellulose membrane as reagent carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113884482A true CN113884482A (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010625130.XA Pending CN113884482A (en) | 2020-07-02 | 2020-07-02 | Formaldehyde self-testing box with biological cellulose membrane as reagent carrier |
Country Status (1)
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| CN (1) | CN113884482A (en) |
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|---|---|---|---|---|
| KR20060088325A (en) * | 2005-02-01 | 2006-08-04 | 주식회사 엔버스 | Method and kit for measurement of formaldehyde in air |
| CN102565043A (en) * | 2011-12-16 | 2012-07-11 | 邯郸派瑞电器有限公司 | Kit capable of quickly detecting formaldehyde in air |
| CN103698324A (en) * | 2013-11-27 | 2014-04-02 | 厦门理工学院 | Air formaldehyde self testing kit |
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