CN103399010B - A kind of preparation method of formaldehyde examination plate of changeable colour - Google Patents
A kind of preparation method of formaldehyde examination plate of changeable colour Download PDFInfo
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- CN103399010B CN103399010B CN201310383360.XA CN201310383360A CN103399010B CN 103399010 B CN103399010 B CN 103399010B CN 201310383360 A CN201310383360 A CN 201310383360A CN 103399010 B CN103399010 B CN 103399010B
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Abstract
The invention provides a kind of preparation method of formaldehyde examination plate of changeable colour, comprise following processing step: (1), preparation adsorbent activity aluminium oxide, cementing agent sodium carboxymethyl cellulose, indicator permanganate, plastic base; (2), the mass ratio of adsorbent and cementing agent is 10:1, and adding water to stir forms pasty state, and be spread evenly across by pastel on plastic base, the thickness of pastel coating is 0.5-3 millimeter; (3), by the plastic base coated be placed on 100-120 DEG C of heat-activated in drying box, take out after 1-3 hour, be cooled to room temperature; (4), by indicator add water and be made into the solution that concentration is 3-5%, the plastic base after activation is flooded wherein, and dip time is 45-90 minute, and dipping post-drying, bake out temperature is 100-140 DEG C, and the time is 1-3 hour, obtains check-out console.This method has advantages such as using simply, cost is low, variable color is obvious, is suitable for resident and detects formaldehyde voluntarily at family expenses.
Description
Technical field
The invention belongs to environmental technology field, relate in particular to a kind of preparation method of formaldehyde examination plate of changeable colour.
Background technology
Formaldehyde is a kind of colourless, has the gas of intense stimulus type smell, soluble in water, alcohol and ether, formaldehyde is magma poisonous substance, energy and protein bound, after sucking high-concentration formaldehyde, there will be the serious stimulation of respiratory tract and oedema, eye shouting pain, headache, also bronchial astehma can occur.Formaldehyde in room air is mainly derived from the artificial board of finishing material and the use of new composite furniture, as the brill mixture in scale board, large core, medium density fiberboard, particieboard (flakeboard), when heat, deliquescence, in bonding agent, formaldehyde just discharges.Be used as the insulating material of house solar heat protection, resisting cold, under the effect of light and heat, after aging, also can discharge formaldehyde.In country and industry standard, the detection method of formaldehyde is mainly spectrophotometer method and vapor-phase chromatography, and these method accuracys rate are high, favorable reproducibility, but complicated operation, and common resident cannot use.In addition, some adopt the formaldehyde examination instrument of electrochemical process can detect concentration of formaldehyde at the scene easily, but the instrument cost of the type is high, safeguard complicated, need professional to operate, also inapplicable with common resident.Chinese patent CN1563954A discloses a kind of formaldehyde quick detection test paper, utilize the detection paper formaldehyde of dipping AHMT, hydrogen-oxygen agent and potassium metaperiodate, but because AHMT is very unstable in the basic conditions, the Test paper described in the method can not be preserved, and usability is poor; US Patent No. 4511658, disclosed method is on solid support, first form supercarbonate precipitation, then precipitates with the acetone soln process supercarbonate of AHMT, then exposes and detects concentration of formaldehyde in atmosphere; Method disclosed in Chinese patent 200610057924.0 is also carry on the support by highly basic, drops on highly basic after AHMT and acid solution being reacted.The principle that above-mentioned several method all adopts AHMT and formaldehyde reaction to develop the color, also exist cost high, with formaldehyde reaction after before and after contrast unconspicuous shortcoming.
Summary of the invention
The present invention provides a kind of preparation method of formaldehyde examination plate of changeable colour in order to solve the problem.
Technical scheme of the present invention is achieved in that a kind of preparation method of formaldehyde examination plate of changeable colour, comprises following processing step:
(1), adsorbent activity aluminium oxide, cementing agent sodium carboxymethyl cellulose, indicator permanganate, plastic base is prepared;
(2), the mass ratio of adsorbent and cementing agent is 10:1, and adding water to stir forms pasty state, and be spread evenly across by pastel on plastic base, the thickness of pastel coating is 0.5-3 millimeter;
(3), by the plastic base coated be placed on 100-120 DEG C of heat-activated in drying box, take out after 1-3 hour, be cooled to room temperature 25 DEG C;
(4), by indicator add water and be made into the solution that concentration is 3-5%, the plastic base after activation is flooded wherein, and dip time is 45-90 minute, dipping post-drying, and bake out temperature is 100-140 DEG C, and the time is 1-3 hour, obtains check-out console;
Described adsorbent also can be silica gel, and indicator permanganate comprises potassium permanganate, sodium permanganate;
Be positioned over by check-out console in environment to be detected during use, become the concentration that the time russet judges formaldehyde according to check-out console completely by purple, Coloring Time is concentration of formaldehyde >=0.50ppm within 4 hours; Coloring Time is 4-12 hour, concentration of formaldehyde >=0.10ppm, concentration of formaldehyde < 0.50ppm; Coloring Time is more than 12 hours, concentration of formaldehyde < 0.10ppm.
The invention has the beneficial effects as follows: the present invention adopts permanganate as indicator, because septivalency manganate is purple and has strong oxidizing property, sexavalence manganese is easily reduced into thus aobvious tawny, according to the concentration of display formaldehyde that the speed of indicator discoloration time can be rough after running into formaldehyde.This method has advantages such as using simply, cost is low, variable color is obvious, is suitable for resident and detects formaldehyde voluntarily at family expenses.
Embodiment
In order to Comprehension and Implementation better, the preparation method the following detailed description of a kind of formaldehyde examination plate of changeable colour: ready 1cm × 3cm plastic base is cleaned and dries; By activated alumina, sodium carboxymethyl cellulose according to after the mass ratio mixing of 10:1, adding water to stir forms pasty state, and be spread evenly across by pastel on plastic base, coating thickness is 1CM; The plastic base coated is placed on 110 DEG C of activation in drying box to take out after 2 hours, put to room temperature, activation is the process improving adsorbent activity, can remove absorbed moisture by heating, increases the activity of adsorbent; The liquor potassic permanganate of configuration 3%, is placed therein dipping 45 minutes by the check-out console coated; Check-out console after dipping is stand-by after 2 hours 120 DEG C of dryings.
Inject certain density formaldehyde by sealing experiment cabin, be placed into check-out console, find its after 2.4 hours coating all become tawny by purple, by methylene oxide detecting instrument detect concentration of formaldehyde be 0.78ppm.
Inject certain density formaldehyde by sealing experiment cabin, be placed into check-out console, find its after 6 hours coating all become tawny by purple, by methylene oxide detecting instrument detect concentration of formaldehyde be 0.34ppm.
Inject certain density formaldehyde by sealing experiment cabin, be placed into check-out console, find its after 24 hours coating all become tawny by purple, by methylene oxide detecting instrument detect concentration of formaldehyde be 0.03ppm.
Claims (3)
1. a preparation method for the formaldehyde examination plate of changeable colour, is characterized in that comprising following processing step:
(1), adsorbent activity aluminium oxide, cementing agent sodium carboxymethyl cellulose, indicator permanganate, plastic base is prepared;
(2), the mass ratio of adsorbent and cementing agent is 10:1, and adding water to stir forms pasty state, and be spread evenly across by pastel on plastic base, the thickness of pastel coating is 0.5-3 millimeter;
(3), by the plastic base coated be placed on 100-120 DEG C of heat-activated in drying box, take out after 1-3 hour, be cooled to room temperature 24-26 DEG C;
(4), by indicator add water and be made into the solution that concentration is 3-5%, the plastic base after activation is flooded wherein, and dip time is 45-90 minute, and dipping post-drying, bake out temperature is 100-140 DEG C, and the time is 1-3 hour, obtains check-out console.
2. the preparation method of the formaldehyde examination plate of a kind of changeable colour according to claim 1, it is characterized in that described adsorbent also can be silica gel, indicator permanganate comprises potassium permanganate, sodium permanganate.
3. the preparation method of the formaldehyde examination plate of a kind of changeable colour according to claim 1 and 2, it is characterized in that when using, check-out console being positioned in environment to be detected, become by purple the concentration that the time russet judges formaldehyde according to check-out console completely, Coloring Time is concentration of formaldehyde >=0.50ppm within 4 hours; Coloring Time is 4-12 hour, concentration of formaldehyde >=0.10ppm, concentration of formaldehyde < 0.50ppm; Coloring Time is more than 12 hours, concentration of formaldehyde < 0.10ppm.
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| CN201310383360.XA CN103399010B (en) | 2013-08-28 | 2013-08-28 | A kind of preparation method of formaldehyde examination plate of changeable colour |
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| CN201310383360.XA CN103399010B (en) | 2013-08-28 | 2013-08-28 | A kind of preparation method of formaldehyde examination plate of changeable colour |
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| CN103399010B true CN103399010B (en) | 2015-09-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841192A (en) * | 2017-04-18 | 2017-06-13 | 乐凯（沈阳）科技产业有限责任公司 | A kind of diazepine structure directing agent detects carbaldehyde Method and its application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372240A (en) * | 2015-12-16 | 2016-03-02 | 无锡吉进环保科技有限公司 | Preparation method of rapid formaldehyde detection reagent |
| CN105424694A (en) * | 2015-12-16 | 2016-03-23 | 无锡吉进环保科技有限公司 | Formaldehyde detection reagent |
| CN105424693A (en) * | 2015-12-16 | 2016-03-23 | 无锡吉进环保科技有限公司 | Rapid detection reagent for formaldehyde |
| CN108484414B (en) * | 2018-05-03 | 2021-03-26 | 北京化工大学 | Tetraphenylethylene-based formaldehyde fluorescent probe, formaldehyde detection sheet, preparation method of formaldehyde fluorescent probe and formaldehyde detection sheet, and application method of formaldehyde detection sheet |
| CN113984753B (en) * | 2021-11-04 | 2022-12-02 | 长春美泰仪器有限公司 | Formaldehyde detection test paper, preparation method thereof and formaldehyde detection system |
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| CN1524604A (en) * | 2003-02-28 | 2004-09-01 | 郑春生 | Adsorbent and decomposer for indoor harmful formaldehyde gas |
| CN1660477A (en) * | 2004-02-27 | 2005-08-31 | 上海塞艾生物科技有限公司 | Visual type harmful gas remover and preparing method |
| CN102836712A (en) * | 2011-06-24 | 2012-12-26 | 上海牛翼新能源科技有限公司 | Catalyst for completely removing formaldehyde in indoor air at room temperature |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524604A (en) * | 2003-02-28 | 2004-09-01 | 郑春生 | Adsorbent and decomposer for indoor harmful formaldehyde gas |
| CN1660477A (en) * | 2004-02-27 | 2005-08-31 | 上海塞艾生物科技有限公司 | Visual type harmful gas remover and preparing method |
| CN102836712A (en) * | 2011-06-24 | 2012-12-26 | 上海牛翼新能源科技有限公司 | Catalyst for completely removing formaldehyde in indoor air at room temperature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106841192A (en) * | 2017-04-18 | 2017-06-13 | 乐凯（沈阳）科技产业有限责任公司 | A kind of diazepine structure directing agent detects carbaldehyde Method and its application |
| CN106841192B (en) * | 2017-04-18 | 2019-05-03 | 乐凯（沈阳）科技产业有限责任公司 | A kind of diazepine structure directing agent detection carbaldehyde Method and its application |
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