CN101000309A - Test paper for quickly investigating formol content in aquatic product - Google Patents
Test paper for quickly investigating formol content in aquatic product Download PDFInfo
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- CN101000309A CN101000309A CN 200610124302 CN200610124302A CN101000309A CN 101000309 A CN101000309 A CN 101000309A CN 200610124302 CN200610124302 CN 200610124302 CN 200610124302 A CN200610124302 A CN 200610124302A CN 101000309 A CN101000309 A CN 101000309A
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- test paper
- formaldehyde
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 229960004279 formaldehyde Drugs 0.000 title description 48
- 235000019256 formaldehyde Nutrition 0.000 title description 40
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 7
- 239000005695 Ammonium acetate Substances 0.000 claims abstract description 6
- 229940043376 ammonium acetate Drugs 0.000 claims abstract description 6
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000019257 ammonium acetate Nutrition 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 235000013305 food Nutrition 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 3
- 210000000214 mouth Anatomy 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 208000010513 Stupor Diseases 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 2
- 230000037406 food intake Effects 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002485 urinary effect Effects 0.000 description 2
- 206010000087 Abdominal pain upper Diseases 0.000 description 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 206010001580 Albuminuria Diseases 0.000 description 1
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 208000037157 Azotemia Diseases 0.000 description 1
- 206010010741 Conjunctivitis Diseases 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 208000010496 Heart Arrest Diseases 0.000 description 1
- 206010067125 Liver injury Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000036471 bradycardia Effects 0.000 description 1
- 208000006218 bradycardia Diseases 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 210000002249 digestive system Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002496 gastric effect Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 231100000234 hepatic damage Toxicity 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 206010022694 intestinal perforation Diseases 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 230000008818 liver damage Effects 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- LODWBJCNJOZPMV-UHFFFAOYSA-N methanediol;hydrate Chemical compound O.OCO LODWBJCNJOZPMV-UHFFFAOYSA-N 0.000 description 1
- 210000002200 mouth mucosa Anatomy 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 210000003800 pharynx Anatomy 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 206010039083 rhinitis Diseases 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 208000009852 uremia Diseases 0.000 description 1
- 208000003663 ventricular fibrillation Diseases 0.000 description 1
- 210000004916 vomit Anatomy 0.000 description 1
- 230000008673 vomiting Effects 0.000 description 1
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- 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 discloses aquatic product formaldehyde content fast detecting test paper. It improves color developing reagent formula that 10-50ml ethanol, 2ml acetylacetone, 10-25g ammonium acetate are adding water to make up to volume at 100ml. The test paper can be cut into needed strip, packaged by black packing material. While liquid drops one the test paper, or it is directly immerged into the liquid, the wetting part of the test paper will turn yellow in two minutes if the formaldehyde content is more than 20ppm. Then it is compared with the standard color contrasting card to judge formaldehyde content in the detecting liquid. The detecting test paper of the invention can improve detecting sensitivity and stability, shorten drying time, and increase production efficiency.
Description
Technical field
The present invention relates to the food safety detection field, specifically, relate to a kind of can the fast detecting aquatic products in the test paper of content of formaldehyde.
Background technology
Formaldehyde has another name called formaldehyde; English name is: Formaldehyde or Methanal; Chemical formula is CH
2O; Under the normal temperature a kind of colourless, gas with intense stimulus, fusing point-92 ℃, boiling point-19.5 ℃, relative density 0.815; Multiple organic solvents such as soluble in water and ethanol, concentration of aqueous solution reaches as high as 55%.Formaldehyde in rare formalin almost all changes into its hydrate methylene glycol CH
2(OH)
2Denseer formalin (as formalin) through the placement of long period or make it slowly to evaporate, then aggregate into paraformaldehyde (CH
2O) n, n=6～50.
Formaldehyde is poisonous, sucks that formaldehyde vapors can cause nausea, rhinitis, bronchitis and conjunctivitis etc.Formaldehyde directly contacts with skin and can cause and burn.In June, 2004, the report delivered of IARC of the World Health Organization (WHO) claimed that the formaldehyde of high concentration can cause ear, nose and laryngocarcinoma, also mentioned also simultaneously causing leukaemia.
Formaldehyde in food if enter human body through the oral cavity, can exert an influence to digestion, nerve, circulation and urinary system, and severe patient is with threat to life.Wrongly take formalin, can cause oral cavity, oesophagus, gastrointestinal damage, cause the alimentary canal perforation, or cause shock, stupor and liver, renal damage.Digestive system shows as: can occur feeling sick, vomitting.As be oral ingestion, can cause mouth, pharynx, oesophagus and stomach burn feeling, the erosion of companion's oral mucosa, epigastric pain rejects the band bloody vomit; Gastric-intestinal perforation and liver damage take place when serious.Because formaldehyde is converted into methyl alcohol in vivo, can produce anesthesia to nervous system, performance: headache, giddy, eye-blurred and weak constitutional symptom are arranged; Stupor can appear when serious.Circulation system performance: for heart rate is accelerated elevation of blood pressure; Blood pressure drops, shock can appear when serious, even bradycardia, ventricular fibrillation, cardiac arrest.The urinary system performance: serious oral ingestion can cause kidney damage performances such as albuminuria, renal shutdown, uremia.The per os lethal quantity of wrongly taking formalin is about 10～20ml.
Formaldehyde must not detect in most of food for the explicitly provided adjuvant that uses in food forbidden of country, and Ministry of Agriculture's regulation water-soaked food Background Value of Formaldehyde is limited the quantity of and is 10ppm.The aquatic products that use formalin to soak can be anticorrosion, and can brighten, change color and luster, sends out aquatic products various so some illegal retailer steeps with it, extending the shelf life, and increase toughness and crisp sense; Also some illegal retailer fumigates even it is directly joined in wheaten food, mushroom or the bean product with it, reaches the purpose that increases certainly, changes color and luster, thus serious threat people's health.
The method of measuring content of formaldehyde at present has vapor-phase chromatography, liquid phase chromatography, gas-matter coupling method, variable color acid system, acetylacetone method etc.Yet above detection method complex operation, strongly professional is not suitable for the ordinary people and uses.To use simple, result to judge clear and detect test paper, is fit to popular the use.
The at present known patent that detects test paper about formaldehyde in food has only two kinds: a kind of for " being used to detect test paper, test solution and the detection method thereof of formaldehyde, methanol content " (CN1256421), this test paper is to be suctioned after Schiff's reagent or class be Dick's reagent by common filter paper, dry forming under the cryogenic vacuum condition.Its shortcoming is in measuring aquatic products during content of formaldehyde, and the protein in the aquatic products seriously disturbs its chromogenic reaction, thereby has influence on the accuracy of testing result.Another for " be not subjected to protein disturb fast detecting water send out or aquatic products in the test paper of formaldehyde composition " (CN1487296), this test paper is that common test paper is cut into strip, soak into fully the aqueous solution reagent of forming by diacetone-ammonium acetate 2 minutes, take out back drying under room temperature lucifuge condition and form.Be slightly soluble in neutral water owing to diacetone is soluble in acidulous water, therefore its diacetone of reagent of allotting of the developer prescription that provides by this patent can not be fully and water miscible, cause the on the low side and skewness of diacetone content in water.Simultaneously,, easily resolve into acetic acid and acetone, cause this developer instability, need matching while using, thereby bring very big constant to practical application because diacetone is unstable in water.Its sensitivity that detects formaldehyde of test paper that goes out with this developer formulation only is 30ppm, can not detect the formaldehyde that contains in the following aquatic products of 30ppm, thereby can't guarantee the safety of aquatic products.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of highly sensitive, developer good stability, the test paper of content of formaldehyde in the convenient and practical fast detecting aquatic products.
For achieving the above object, the present invention improves the developer prescription.
Developer prescription of the present invention is to contain 10～50 milliliters of ethanol in per 100 ml solns, 2 milliliters of diacetones, and ammonium acetate 10～25 grams add water and are settled to 100 milliliters.Optimum formula is to contain 50 milliliters of ethanol in per 100 ml solns, 2 milliliters of diacetones, and ammonium acetate 25 grams add water and are settled to 100 milliliters.
The preparation method who detects test paper is: common filter paper is soaked taking-up after 2 minutes in developer, at room temperature vacuum drying forms then.Test paper can be cut into the strip of suitable size as required, and packs with the black wrappage, with lucifuge and prevent that oxidation by air from making the test paper flavescence.
Detection method is: when detecting the aquatic products content of formaldehyde, with drop to be measured to test paper, or directly immerse test paper in the liquid to be measured, when content of formaldehyde is greater than 20ppm in the liquid to be measured, flavescence in about 2 minutes of the test paper wetted portions contrasts the content that can judge formaldehyde in the liquid to be measured with the yellow color depth and the standard color comparison card that shows.
Compared with prior art, the present invention has following beneficial effect: the present invention is by improving the existing developer prescription that detects test paper:
(1) by in developer, adding absolute ethyl alcohol, improved the solubleness of diacetone in developer, the test paper sensitivity of making reaches 20ppm, surpasses the 30ppm of prior art.
(2) by in developer, adding absolute ethyl alcohol, improve the stability of diacetone, prolonged the stationary phase of developer.
(3) by in developer, adding absolute ethyl alcohol, shorten the drying time of test paper, improved production efficiency.
Embodiment
Embodiment 1:
Formaldehyde detection test paper with method for preparing detects a collection of formalin of randomly drawing out (concerning using formaldehyde test paper person from the formaldehyde titer of concentration known, the concentration of formaldehyde all is unknown in this batch solution), the user according to the result of chromogenic reaction judge have in the solution formaldehydeless, and and normal concentration contrast the correctness of judging testing result, judge that with this self-control formaldehyde detects the practicality of test paper.Testing result sees Table 1:
Table 1
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| The result | - | + | + | - | + | + | - | - | - | - |
| Concentration (ppm) | 15 | 50 | 35 | 10 | 25 | 40 | 5 | 0 | 10 | 10 |
Annotate: "+" representative colour developing is the result be positive, and "-" representative colour developing is the result be negative
Embodiment 2:
Formaldehyde detection test paper with method for preparing detects a collection of formalin of randomly drawing out (concerning using formaldehyde test paper person from the formaldehyde titer of concentration known, the concentration of formaldehyde all is unknown in this batch solution), the user according to the result of chromogenic reaction judge have in the solution formaldehydeless, and and normal concentration contrast the correctness of judging testing result, judge that with this self-control formaldehyde detects the practicality of test paper.Testing result sees Table 2:
Table 2
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| The result | - | + | + | + | - | + | + | + | + | - |
| Concentration (ppm) | 0 | 30 | 50 | 25 | 10 | 30 | 35 | 40 | 50 | 5 |
Annotate: "+" representative colour developing is the result be positive, and "-" representative colour developing is the result be negative
Embodiment 3:
Formaldehyde detection test paper with method for preparing detects a collection of formalin of randomly drawing out (concerning using formaldehyde test paper person from the formaldehyde titer of concentration known, the concentration of formaldehyde all is unknown in this batch solution), the user according to the result of chromogenic reaction judge have in the solution formaldehydeless, and and normal concentration contrast the correctness of judging testing result, judge that with this self-control formaldehyde detects the practicality of test paper.Testing result sees Table 3:
Table 3
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| The result | - | + | + | + | - | - | - | - | + | + |
| Concentration (ppm) | 0 | 25 | 35 | 25 | 5 | 15 | 0 | 10 | 20 | 40 |
Annotate: "+" representative colour developing is the result be positive, and "-" representative colour developing is the result be negative
By above-mentioned three embodiment, detect 30 samples altogether, result and normal concentration contrast show accurately to detect the formaldehyde sample of concentration greater than 20ppm.
Claims (3)
1, the quick detection test paper of content of formaldehyde in a kind of aquatic products comprises test paper and the reagent for preparing test paper, it is characterized in that:
(1) reagent of preparation test paper is developer, and prescription is to contain 10～50 milliliters of ethanol in per 100 ml solns, 2 milliliters of diacetones, and ammonium acetate 10～25 grams add water and are settled to 100 milliliters;
(2) test paper is soaked in developer, vacuum drying at room temperature forms after the taking-up.
2, quick detection test paper as claimed in claim 1, the prescription that it is characterized in that described developer are to contain 50 milliliters of ethanol in per 100 ml solns, 2 milliliters of diacetones, and ammonium acetate 25 grams add water and are settled to 100 milliliters.
3, utilize the method for content of formaldehyde in claim 1 or the 2 described detection paper aquatic products, it is characterized in that: with drop to be measured to test paper, or directly immerse test paper in the liquid to be measured, when content of formaldehyde is greater than 20ppm in the liquid to be measured, flavescence in about 2 minutes of the test paper wetted portions contrasts the content that can judge formaldehyde in the liquid to be measured with the yellow color depth and the standard color comparison card that shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610124302 CN101000309A (en) | 2006-12-19 | 2006-12-19 | Test paper for quickly investigating formol content in aquatic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610124302 CN101000309A (en) | 2006-12-19 | 2006-12-19 | Test paper for quickly investigating formol content in aquatic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101000309A true CN101000309A (en) | 2007-07-18 |
Family
ID=38692367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610124302 Pending CN101000309A (en) | 2006-12-19 | 2006-12-19 | Test paper for quickly investigating formol content in aquatic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101000309A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221546A (en) * | 2010-11-25 | 2011-10-19 | 苏州工业园区安泽汶环保技术有限公司 | Detection test paper for formaldehyde and/or acetaldehyde in air, detection method thereof and preparation method for detection test paper |
| CN102353673A (en) * | 2011-09-30 | 2012-02-15 | 哈尔滨工业大学 | Formaldehyde test paper and preparation method thereof |
| CN103196902A (en) * | 2012-01-04 | 2013-07-10 | 窦荣艳 | Air formaldehyde self-detecting box |
| CN103616380A (en) * | 2013-12-03 | 2014-03-05 | 广东中测食品化妆品安全评价中心有限公司 | Reagent and method for rapidly detecting formaldehyde in foods |
| CN104034682A (en) * | 2014-06-27 | 2014-09-10 | 宜特科技(昆山)电子有限公司 | Method for measuring formaldehyde emission amount of interior decoration material |
| CN104076034A (en) * | 2014-07-17 | 2014-10-01 | 北京福德安科技有限公司 | RGB quantitative quick detecting test paper for formaldehyde residue in food |
| CN104359902A (en) * | 2014-11-13 | 2015-02-18 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
| CN107741420A (en) * | 2017-10-16 | 2018-02-27 | 祁忆青 | A kind of device and method for preparing test paper of Rapid Detection of Formaldehyde burst size |
| CN113777098A (en) * | 2020-06-10 | 2021-12-10 | 四川精卫食品检测科技有限公司 | Method for rapidly determining content of methanol in white spirit |
| CN113984753A (en) * | 2021-11-04 | 2022-01-28 | 长春美泰仪器有限公司 | Formaldehyde detection test paper, preparation method thereof and formaldehyde detection system |
| CN117969500A (en) * | 2024-03-27 | 2024-05-03 | 山东新蓝环保科技有限公司 | Method for detecting aldehydes in urea aqueous solution of nitrogen oxide reducing agent |
-
2006
- 2006-12-19 CN CN 200610124302 patent/CN101000309A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221546A (en) * | 2010-11-25 | 2011-10-19 | 苏州工业园区安泽汶环保技术有限公司 | Detection test paper for formaldehyde and/or acetaldehyde in air, detection method thereof and preparation method for detection test paper |
| CN102221546B (en) * | 2010-11-25 | 2012-11-07 | 苏州工业园区安泽汶环保技术有限公司 | Detection test paper for formaldehyde and/or acetaldehyde in air, detection method thereof and preparation method for detection test paper |
| CN102353673A (en) * | 2011-09-30 | 2012-02-15 | 哈尔滨工业大学 | Formaldehyde test paper and preparation method thereof |
| CN103196902A (en) * | 2012-01-04 | 2013-07-10 | 窦荣艳 | Air formaldehyde self-detecting box |
| CN103616380A (en) * | 2013-12-03 | 2014-03-05 | 广东中测食品化妆品安全评价中心有限公司 | Reagent and method for rapidly detecting formaldehyde in foods |
| CN104034682A (en) * | 2014-06-27 | 2014-09-10 | 宜特科技(昆山)电子有限公司 | Method for measuring formaldehyde emission amount of interior decoration material |
| CN104076034A (en) * | 2014-07-17 | 2014-10-01 | 北京福德安科技有限公司 | RGB quantitative quick detecting test paper for formaldehyde residue in food |
| CN104359902A (en) * | 2014-11-13 | 2015-02-18 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
| CN104359902B (en) * | 2014-11-13 | 2017-05-03 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
| CN107741420A (en) * | 2017-10-16 | 2018-02-27 | 祁忆青 | A kind of device and method for preparing test paper of Rapid Detection of Formaldehyde burst size |
| CN113777098A (en) * | 2020-06-10 | 2021-12-10 | 四川精卫食品检测科技有限公司 | Method for rapidly determining content of methanol in white spirit |
| CN113984753A (en) * | 2021-11-04 | 2022-01-28 | 长春美泰仪器有限公司 | Formaldehyde detection test paper, preparation method thereof and formaldehyde detection system |
| CN117969500A (en) * | 2024-03-27 | 2024-05-03 | 山东新蓝环保科技有限公司 | Method for detecting aldehydes in urea aqueous solution of nitrogen oxide reducing agent |
| CN117969500B (en) * | 2024-03-27 | 2024-06-07 | 山东新蓝环保科技有限公司 | Method for detecting aldehydes in urea aqueous solution of nitrogen oxide reducing agent |
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