CN102353749B - Test paper for quickly detecting formaldehyde in air - Google Patents
Test paper for quickly detecting formaldehyde in air Download PDFInfo
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- CN102353749B CN102353749B CN201110191992.7A CN201110191992A CN102353749B CN 102353749 B CN102353749 B CN 102353749B CN 201110191992 A CN201110191992 A CN 201110191992A CN 102353749 B CN102353749 B CN 102353749B
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Abstract
The invention discloses test paper for quickly detecting formaldehyde in air. The test paper consists of test paper with a formaldehyde catching agent and a color developing agent, a color development initiating agent and a color comparison card, wherein the color developing agent is 4-amino-3-hydrazine-5-sulfydryl-1,2,4-triazole; and each gram of test paper contains 1 to 100mg of formaldehyde catching agent and 1 to 100mg of color developing agent. When the test paper is used, the color development initiating agent is dripped onto the test paper with the formaldehyde catching agent and the color developing agent, and the test paper is placed in air to be detected and then is compared with the color comparison card within 1 to 20 minutes so as to read a formaldehyde concentration value out. The test paper is quick and sensitive, is easy and convenient to operate, has low cost, does not need special personnel during detection and can be conveniently used by people in families.
Description
Technical field
The present invention relates to a kind of formaldehyde in air quick detection test paper, semi-quantitatively can detect low concentration formaldehyde content in air fast, belong to chemical analysis detection field.
Background technology
Under normal temperature, formaldehyde is a kind of colourless easily molten irritative gas, can absorb through respiratory tract, can with biological cell protein bound, be the protoplasm material that a kind of toxicity is very strong, by international cancer, research institute is classified as one of carcinogen, occupies the second that hypertoxicity material controls.The impact of formaldehyde on health is mainly manifested in the aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction.When its concentration reaches 0.060.07 milligram/cubic meter in every cubic metres of air, will there is slight asthma in children; When reaching 0.1 milligram/cubic metre, just there are peculiar smell and sense of discomfort; When reaching 0.5 milligram/cubic metre, can eyes be stimulated, cause and shed tears; When reaching 30 milligrams/cubic metre, meeting causing death immediately." Indoor Air Quality standards " (GB/T18883-2002) specifies air formaldehyde concentration not higher than 0.1mg/m3.
Formaldehyde is widely used in commercial production, is the raw material manufacturing synthetic resin, paint, plastics and regenerated fiber, is the important source material of the bonding agent (urea-formaldehyde resin adhesive, melamine resin glue and phenolic resin glue) that wood-based panel industry manufacture uses.At present, it is tackifier that countries in the world produce the main urea-formaldehyde resin adhesive (UF) used of wood-based plate (comprising scale board, lumber core, medium density fibre board (MDF) and particieboard etc.), urea-formaldehyde resin adhesive be with formaldehyde and urea for raw material, carry out addition reaction and polycondensation reaction under certain condition and the tackifier made.Research shows, the formaldehyde fitted up and contain in furniture, its release period reaches 3-15, newly builds up in the house being unkitted and repairing and fit up soon in China, and the recall rate of formaldehyde is 100%, causes " house ornamentation leading killer " that formaldehyde becomes generally acknowledged.
In indoor environment and air of workplace, concentration of formaldehyde test adopts impingement more, namely sampling pump is utilized to extract the air sample of certain volume through formaldehyde absorption bottle, carry out quantitative test by chemical colorimetric after going back to laboratory or analyze by gas chromatography, also can directly detect at the scene.The method needs professional, professional equipment carries out analytical test, and consuming time comparatively of a specified duration, costly, tests a concentration of formaldehyde up to 300-500 unit, is not suitable for ordinary people family and uses.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, propose a kind of quick, sensitive, stable test paper for formaldehyde detection.
The present invention relates to a kind of formaldehyde in air quick detection test paper, by be loaded with formaldehyde catching agent and developer test paper, colour developing initiating agent and colorimetric card form.Developer is 4-amino-3-hydrazine-5-sulfydryl-1,2,4-triazole (be called for short AHMT), developer test paper charge capacity can be the 1mg/g ~ 100mg/g amount of load developer (on the unit mass test paper), and optimum load amount is 10mg/g ~ 50mg/g.Formaldehyde catching agent can be, but not limited to diethylenetriamine, triethylene tetramine, ethylenediamine, sulphite or lays particular stress on sulphite, and formaldehyde catching agent test paper charge capacity can be 1mg/g ~ 100mg/g, and optimum load amount is 5mg/g ~ 20mg/g.The test paper being loaded with formaldehyde catching agent and developer can be, but not limited to the harmless cloth of filter paper, cotton and water absorptivity.The method on test paper by formaldehyde catching agent and developer load, can be load developer after utilizing the method for soaking or drip first to load formaldehyde catching agent, also can be load formaldehyde catching agent after first loading developer, or formaldehyde catching agent and developer are hybridly prepared into acid solution, directly drip or soak test paper.Test paper is dry after having prepared.
Colour developing initiating agent can be, but not limited to the aqueous solution of NaOH, potassium hydroxide, and solution concentration can be between 0.1mol/L to saturated solution, and the optium concentration of solution is 0.5mol/L ~ 2mol/L.Colour developing initiating agent can be packaged in hard or soft plastic bottle, but can not seal up for safekeeping in vial.
Colorimetric card is aubergine colour system, divides 4 to 10 class from shallow to deep, and marks to different colours is corresponding respectively the concentration of formaldehyde value measured.Concentration of formaldehyde value mark adopts formaldehyde standard gas calibration, namely the standard air product of a series of known concentration of formaldehyde are prepared, above-mentioned test paper is placed in the standard air product of known concentration of formaldehyde, observe the color at a certain special time test paper, now the concentration of formaldehyde value of standard air product is corresponding with the color of test paper.
This test paper can be used to the content detecting low concentration formaldehyde in air, using method is as follows: take out the test paper being loaded with formaldehyde catching agent and developer, drips colour developing initiating agent, is exposed in environment to be measured, contrast with colorimetric card after several minutes, read the concentration of formaldehyde in air.
This method is directly carried on test paper formaldehyde catching agent and developer, during use, drops on test paper, be exposed to colour developing initiating agent highly basic in environment to be measured.Formaldehyde be captured agent be enriched on test paper with AHMT condensation, be then oxidized to aubergine compound, the depth of color is directly proportional to surveyed Formaldehyde in Environment concentration.In several minutes, test paper and colorimetric card can be compared, read the concentration of formaldehyde in air according to the depth of color.
The present invention is that load is surperficial at test paper in solid form by developer AHMT, is deposited in liquid form by the colour developing initiating agent highly basic of excellent stability, considerably increases stability and the shelf life of test paper.The method allows formaldehyde enrichment and colour developing synchronously carry out, and improves sensitivity, shortens the test duration.
Beneficial effect:
The invention provides a kind of formaldehyde in air quick detection test paper, have quick, sensitive, easy and simple to handle, cost is low, without the need to professional detect, be convenient to the features such as the common people use in the family voluntarily.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
Cut the filter paper bar one that size is 0.5cm × 4cm, being immersed in concentration is in the diethylenetriamine solution of 0.2mol/L, dries after taking out after 10min; Then drip to its surface the hydrochloric acid solution that concentration is the AHMT of 0.05mol/L, then dry, obtain test paper.During use, drip the sodium hydroxide solution of 0.5mol/L, be placed in environment to be measured, concentration is 0.15mg/m
3, start colour developing after 2min, after 10min, contrast with colorimetric card, display slight pollution.
Embodiment 2
Cut the filter paper bar one that size is 0.5cm × 4cm, being immersed in concentration is in the salpeter solution of the AHMT of 0.1mol/L, takes out, dry after half an hour; Being immersed in concentration is again in the sodium sulfite solution of 0.02mol/L, takes out, then dry after 5min, obtains test paper.During use, drip the potassium hydroxide solution of 1.0mol/L, be placed in environment to be measured, concentration is 1.2mg/m
3, start colour developing after 10s, after 10min, contrast with colorimetric card, display severe contamination.
Embodiment 3
Cut the harmless cloth of water suction one that size is 1cm × 5cm, being immersed in concentration is in the hydrochloric acid solution of the AHMT of 0.05mol/L, takes out after 1h, blots the supernatant liquid on surface with filter paper; And then drip to its surface the triethylene tetramine solution that concentration is 0.01mol/L, after drying, namely obtain test paper.During use, drip the sodium hydroxide solution of 0.5mol/L, be placed in environment to be measured, concentration is 0.05mg/m
3, after 10min, contrast with colorimetric card, show formaldehydeless.
Embodiment 4
Cut the harmless cloth of water suction one that size is 1cm × 5cm, being immersed in concentration is in the ethylenediamine solution of 0.05mol/L, takes out after drying after 5min; Then be immersed in the AHMT solution that concentration is 0.006mol/L, take out after 5min, dry, namely obtain test paper.During use, drip the sodium hydroxide solution of 0.02mol/L, be placed in environment to be measured, concentration is 0.7mg/m
3, start colour developing after 13s, after 10min, contrast with colorimetric card, display severe contamination.
Embodiment 5
Get cotton 0.02g, rolled into a ball into cotton balls, be pasted onto one end of vinyl strip, first dripping concentration to cotton balls surface is in the hydrochloric acid solution of the AHMT of 0.5mol/L, after placing a period of time, observe cotton balls without wet water, then drip the Sodium Metabisulfite solution of 0.01mol/L to its surface, after drying, namely obtain test paper.During use, drip the potassium hydroxide solution of 0.1mol/L, be placed in environment to be measured, concentration is 0.5mg/m
3, start colour developing after 30s, after 10min, contrast with colorimetric card, display serious pollution.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (6)
1. a formaldehyde in air quick detection test paper, it is characterized in that: described Test paper is by the test paper being loaded with formaldehyde catching agent and developer, colour developing initiating agent and colorimetric card composition, developer is 4-amino-3-hydrazine-5-sulfydryl-1, 2, 4-triazole, formaldehyde catching agent is diethylenetriamine or triethylene tetramine or ethylenediamine or sulphite or lays particular stress on sulphite, formaldehyde catching agent test paper charge capacity 1mg/g ~ 100mg/g, developer test paper charge capacity 1mg/g ~ 100mg/g, during use, colour developing initiating agent is dropped on the test paper being loaded with formaldehyde catching agent and developer, be placed in air to be measured, compare with colorimetric card in 1 to 20min, concentration of formaldehyde value can be read.
2. Test paper according to claim 1, is characterized in that: described developer test paper charge capacity is 10mg/g ~ 50mg/g.
3. Test paper according to claim 1, is characterized in that: described formaldehyde catching agent test paper charge capacity is 5mg/g ~ 20mg/g.
4. Test paper according to claim 1, is characterized in that: colour developing initiating agent is NaOH or potassium hydroxide.
5. Test paper according to claim 1, is characterized in that: described test paper is that load has the filter paper of formaldehyde catching agent and developer, cotton or the nonwoven fabrics that absorbs water.
6. Test paper according to claim 1, is characterized in that: the every color stage on colorimetric card indicates concentration of formaldehyde value scope.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110191992.7A CN102353749B (en) | 2011-07-11 | 2011-07-11 | Test paper for quickly detecting formaldehyde in air |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110191992.7A CN102353749B (en) | 2011-07-11 | 2011-07-11 | Test paper for quickly detecting formaldehyde in air |
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| CN102353749A CN102353749A (en) | 2012-02-15 |
| CN102353749B true CN102353749B (en) | 2015-07-01 |
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| CN201110191992.7A Active CN102353749B (en) | 2011-07-11 | 2011-07-11 | Test paper for quickly detecting formaldehyde in air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540879A (en) * | 2018-11-28 | 2019-03-29 | 西安培华学院 | A kind of rapid detection method of grease type Antioxidants In Food |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978912B (en) * | 2012-11-19 | 2014-10-15 | 东华大学 | Preparation method of nanofiber membrane formaldehyde test paper |
| CN107340289A (en) * | 2017-06-28 | 2017-11-10 | 防城港市质量技术监督局 | A kind of formaldehyde determination kit |
| CN112873458B (en) * | 2021-01-08 | 2022-05-17 | 山东新港企业集团有限公司 | Flame-retardant environment-friendly solid wood thick-core plywood and preparation method thereof |
| CN113984743B (en) * | 2021-09-30 | 2022-08-16 | 华南理工大学 | Formaldehyde detection test paper based on nano composite fiber and preparation method and application thereof |
| CN116043597B (en) * | 2023-01-19 | 2024-06-25 | 中国科学院长春应用化学研究所 | Test paper for rapidly detecting low-concentration formaldehyde and preparation method thereof |
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| EP0899570A1 (en) * | 1997-01-07 | 1999-03-03 | Obayashi Corporation | Method for determining formaldehyde present in air |
| CN2577278Y (en) * | 2002-11-12 | 2003-10-01 | 吉林大学化学学院 | Disposable colorimetric quick test package of methanal in air |
| CN1570611A (en) * | 2004-05-13 | 2005-01-26 | 上海交通大学 | Quick determination reagent bottle for formaldehyde in the air |
| CN2738246Y (en) * | 2004-11-03 | 2005-11-02 | 上海碧华环保科技有限公司 | Formaldehyde fast detecting instrument |
| CN101086479A (en) * | 2006-06-06 | 2007-12-12 | 张佃志 | Formaldehyde detection reagent kit and its preparation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004104573A1 (en) * | 2003-05-20 | 2004-12-02 | Sakura Color Products Corporation | Indicator composition |
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- 2011-07-11 CN CN201110191992.7A patent/CN102353749B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0899570A1 (en) * | 1997-01-07 | 1999-03-03 | Obayashi Corporation | Method for determining formaldehyde present in air |
| CN2577278Y (en) * | 2002-11-12 | 2003-10-01 | 吉林大学化学学院 | Disposable colorimetric quick test package of methanal in air |
| CN1570611A (en) * | 2004-05-13 | 2005-01-26 | 上海交通大学 | Quick determination reagent bottle for formaldehyde in the air |
| CN2738246Y (en) * | 2004-11-03 | 2005-11-02 | 上海碧华环保科技有限公司 | Formaldehyde fast detecting instrument |
| CN101086479A (en) * | 2006-06-06 | 2007-12-12 | 张佃志 | Formaldehyde detection reagent kit and its preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540879A (en) * | 2018-11-28 | 2019-03-29 | 西安培华学院 | A kind of rapid detection method of grease type Antioxidants In Food |
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