CN102353749A - Test paper for quickly detecting formaldehyde in air - Google Patents
Test paper for quickly detecting formaldehyde in air Download PDFInfo
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- CN102353749A CN102353749A CN2011101919927A CN201110191992A CN102353749A CN 102353749 A CN102353749 A CN 102353749A CN 2011101919927 A CN2011101919927 A CN 2011101919927A CN 201110191992 A CN201110191992 A CN 201110191992A CN 102353749 A CN102353749 A CN 102353749A
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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 formaldehyde quick detection test paper in a kind of air, can sxemiquantitative low concentration formaldehyde content in the ground fast detecting air, belong to the chemical analysis detection range.
Background technology
Under the normal temperature, formaldehyde is a kind of colourless molten irritative gas that is prone to, and can absorb through respiratory tract; Can with the biological cell protein bound; Be the very strong protoplasm material of a kind of toxicity, research institute classifies one of carcinogen as by international cancer, occupies second of hypertoxicity material control.Formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects.When its concentration reached 0.060.07 milligram/cubic meter in every cubic metres of air, slight asthma will take place in children; When reaching 0.1 milligram/cubic metre, peculiar smell and sense of discomfort are just arranged; When reaching 0.5 milligram/cubic metre, can stimulate eyes, cause and shed tears; When reaching 30 milligrams/cubic metre, meeting is the causing death immediately." IAQ (indoor air quality) standard " (GB/T18883-2002) regulation air formaldehyde concentration is not higher than 0.1mg/m3.
Formaldehyde is widely used in the commercial production, is the raw material of making 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) of wood-based panel industry manufacturing use.At present; Countries in the world produce the main urea-formaldehyde resin adhesive (UF) that uses of wood-based plate (comprising scale board, lumber core, medium density fibre board (MDF) and particieboard etc.) and are tackifier; Urea-formaldehyde resin adhesive is to be raw material with formaldehyde and urea, carries out addition reaction and polycondensation reaction under certain condition and the tackifier processed.Research shows, the formaldehyde that contains in finishing and the furniture, and its release period reaches 3-15, newly builds up in China and is unkitted in the house of repairing and fitting up soon, and the recall rate of formaldehyde is 100%, causes formaldehyde to become generally acknowledged " house ornamentation leading killer ".
The concentration of formaldehyde test impingements that adopt in indoor environment and the air of workplace more; Promptly utilize sampling pump to extract the air sample process formaldehyde absorption bottle of certain volume; Return and to carry out quantitative test with chemical colorimetric behind the laboratory or analyze, also can directly detect at the scene with gas chromatography.This method needs professional, professional equipment to carry out analytical test, and consuming time more of a specified duration, and expense is very high, tests a concentration of formaldehyde up to 300-500 unit, is not suitable for ordinary people family and uses.
Summary of the invention
The objective of the invention is deficiency, propose a kind of quick, sensitive, stable formaldehyde and detect test paper to prior art.
The present invention relates to formaldehyde quick detection test paper in a kind of air, form by the test paper that is loaded with formaldehyde catching agent and developer, colour developing initiating agent and colorimetric card.Developer is 4-amino-3-hydrazine-5-sulfydryl-1,2,4-triazole (being called for short AHMT), and developer test paper charge capacity can be 1mg/g～100mg/g (amount of load developer on the unit mass test paper), optimum load amount is 10mg/g～50mg/g.Formaldehyde catching agent can but be not limited to diethylenetriamine, triethylene tetramine, ethylenediamine, sulphite or lay particular stress on sulphite, formaldehyde catching agent test paper charge capacity can be 1mg/g～100mg/g, optimum load amount is 5mg/g～20mg/g.Be loaded with formaldehyde catching agent and developer test paper can but be not limited to the harmless cloth of filter paper, cotton and water absorptivity.Formaldehyde catching agent and developer are loaded on the method on the test paper; Can be to load developer after utilizing the method for soaking or dripping to load formaldehyde catching agent earlier; Also can be to load formaldehyde catching agent after loading developer earlier; Perhaps formaldehyde catching agent and developer are hybridly prepared into acid solution, directly drip or the immersion test paper.After the test paper preparation is accomplished is dry.
The colour developing initiating agent can but be not limited to the aqueous solution of NaOH, potassium hydroxide, solution concentration can be 0.1mol/L between the saturated solution, the optium concentration of solution is 0.5mol/L～2mol/L.The colour developing initiating agent can be packaged in the hard or soft plastic bottle, but can not seal up for safekeeping in vial.
Colorimetric card is the aubergine colour system, divides 4 to 10 class from shallow to deep, and to the corresponding respectively concentration of formaldehyde value of being measured that marks of different colours.Concentration of formaldehyde value mark is to adopt the formaldehyde standard gas calibration; Promptly prepare the standard air article of a series of known concentration of formaldehyde; Above-mentioned test paper is placed in the standard air article of known concentration of formaldehyde; Observation is in the color of a certain special time test paper, and this moment, the concentration of formaldehyde value of standard air article was corresponding with the color of test paper.
This test paper can be used to detect the content of low concentration formaldehyde in the air; Method of application is following: take out the test paper that is loaded with formaldehyde catching agent and developer, drip the colour developing initiating agent, be exposed in the environment to be measured; Contrast the concentration of reading formaldehyde in the air with colorimetric card after several minutes.
This method is that formaldehyde catching agent and developer directly are carried on the test paper, and during use, the initiating agent highly basic that will develop the color drops on the test paper, is exposed in the environment to be measured.The formaldehyde agent that is captured is enriched on the test paper and the AHMT condensation, is oxidized to the aubergine compound then, and concentration of formaldehyde is directly proportional in the depth of color and the survey environment.In several minutes, test paper and colorimetric card can be compared, go out the concentration of formaldehyde in the air according to the shade of color.
The present invention loads on the test paper surface with developer AHMT with the form of solid, and the colour developing initiating agent highly basic of excellent stability is deposited with liquid form, has increased the stability and the shelf life of test paper greatly.This method allows formaldehyde enrichment and colour developing carry out synchronously, has improved sensitivity, has shortened the test duration.
Beneficial effect:
The present invention provides formaldehyde quick detection test paper in a kind of air, have quick, sensitive, easy and simple to handle, cost is low, need not the professional detects, and is convenient to common people's characteristics such as use voluntarily in the family.
Embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
Embodiment 1
Cut size for one of the filter paper bar of 0.5cm * 4cm, it is immersed in the diethylenetriamine solution that concentration is 0.2mol/L, dry after taking out behind the 10min; Dripping concentration to its surface then is the hydrochloric acid solution of the AHMT of 0.05mol/L, dries again, obtains test paper.During use, drip the sodium hydroxide solution of 0.5mol/L, be placed in the environment to be measured, concentration is 0.15mg/m
3, begin colour developing behind the 2min, behind the 10min,, show slight pollution with the colorimetric card contrast.
Embodiment 2
Cut size and be one of the filter paper bar of 0.5cm * 4cm, it is immersed in the salpeter solution of AHMT that concentration is 0.1mol/L, take out after half an hour, dry; It is immersed in the sodium sulfite solution that concentration is 0.02mol/L again, takes out behind the 5min, dry again, obtain test paper.During use, drip the potassium hydroxide solution of 1.0mol/L, be placed in the environment to be measured, concentration is 1.2mg/m
3, begin colour developing behind the 10s, behind the 10min,, show severe contamination with the colorimetric card contrast.
Embodiment 3
Cut size and be one of the harmless cloth of suction of 1cm * 5cm, it is immersed in the hydrochloric acid solution of AHMT that concentration is 0.05mol/L, take out behind the 1h, blot the supernatant liquid on surface with filter paper; And then to drip concentration to its surface be the triethylene tetramine solution of 0.01mol/L, after drying, promptly obtains test paper.During use, drip the sodium hydroxide solution of 0.5mol/L, be placed in the environment to be measured, concentration is 0.05mg/m
3, behind the 10min,, show formaldehydeless with the colorimetric card contrast.
Embodiment 4
Cut size for one of the harmless cloth of suction of 1cm * 5cm, it be immersed in the ethylenediamine solution that concentration is 0.05mol/L, take out behind the 5min dry after; Then it is immersed in the AHMT solution that concentration is 0.006mol/L, takes out behind the 5min, dry, promptly obtain test paper.During use, drip the sodium hydroxide solution of 0.02mol/L, be placed in the environment to be measured, concentration is 0.7mg/m
3, begin colour developing behind the 13s, behind the 10min,, show severe contamination with the colorimetric card contrast.
Embodiment 5
Get cotton 0.02g; It is rolled into a ball into cotton balls; Stick on the rectangular end of tygon; Drip in the hydrochloric acid solution of AHMT that concentration is 0.5mol/L earlier to the cotton balls surface; After placing a period of time, observe cotton balls and do not had wet water, drip the Sodium Metabisulfite solution of 0.01mol/L again to its surface; After drying, promptly obtain test paper.During use, drip the potassium hydroxide solution of 0.1mol/L, be placed in the environment to be measured, concentration is 0.5mg/m
3, begin colour developing behind the 30s, behind the 10min,, show serious pollution with the colorimetric card contrast.
Should be understood that, concerning those of ordinary skills, can improve according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention.
Claims (7)
1. formaldehyde quick detection test paper in the air; It is characterized in that: said detection test paper is made up of the test paper that is loaded with formaldehyde catching agent and developer, colour developing initiating agent and colorimetric card; Developer is 4-amino-3-hydrazine-5-sulfydryl-1; 2; The 4-triazole; Formaldehyde catching agent test paper charge capacity 1mg/g～100mg/g; Developer test paper charge capacity 1mg/g～100mg/g; During use; The colour developing initiating agent is dripped to the test paper that is loaded with formaldehyde catching agent and developer; Be placed in the air to be measured, 1 to 20min interior and colorimetric card comparison can be read the concentration of formaldehyde value.
2. detection test paper according to claim 1 is characterized in that: said developer test paper charge capacity is 10mg/g～50mg/g.
3. detection test paper according to claim 1 is characterized in that: said formaldehyde catching agent test paper charge capacity is 5mg/g～20mg/g.
4. detection test paper according to claim 1 is characterized in that: formaldehyde catching agent is diethylenetriamine or triethylene tetramine or ethylenediamine or sulphite or lays particular stress on sulphite.
5. detection test paper according to claim 1 is characterized in that: the colour developing initiating agent is NaOH or potassium hydroxide.
6. detection test paper according to claim 1 is characterized in that: said test paper is filter paper, cotton or the suction nonwoven fabrics that load has formaldehyde catching agent and developer.
7. detection test paper according to claim 1 is characterized in that: each color range on colorimetric card is indicated concentration of formaldehyde value scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN201110191992.7A CN102353749B (en) | 2011-07-11 | 2011-07-11 | Test paper for quickly detecting formaldehyde in air |
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| Publication Number | Publication Date |
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| CN102353749A true CN102353749A (en) | 2012-02-15 |
| CN102353749B CN102353749B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978912A (en) * | 2012-11-19 | 2013-03-20 | 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 |
| 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 |
| CN112873458A (en) * | 2021-01-08 | 2021-06-01 | 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 |
| CN113984743A (en) * | 2021-09-30 | 2022-01-28 | 华南理工大学 | Formaldehyde detection test paper based on nano composite fiber and preparation method and application thereof |
| CN116043597A (en) * | 2023-01-19 | 2023-05-02 | 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 |
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| US20060281186A1 (en) * | 2003-05-20 | 2006-12-14 | Sakura Color Products Corporation | Indicator composition |
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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 |
| US20060281186A1 (en) * | 2003-05-20 | 2006-12-14 | Sakura Color Products Corporation | Indicator composition |
| CN1570611A (en) * | 2004-05-13 | 2005-01-26 | 上海交通大学 | Quick determination reagent bottle for formaldehyde in the air |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978912A (en) * | 2012-11-19 | 2013-03-20 | 东华大学 | Preparation method of nanofiber membrane formaldehyde test paper |
| 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 |
| 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 |
| CN112873458A (en) * | 2021-01-08 | 2021-06-01 | 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 |
| 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 |
| CN113984743A (en) * | 2021-09-30 | 2022-01-28 | 华南理工大学 | Formaldehyde detection test paper based on nano composite fiber and preparation method and application 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 |
| CN116043597A (en) * | 2023-01-19 | 2023-05-02 | 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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| CN102353749B (en) | 2015-07-01 |
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