CN103399010A - Manufacturing method of color-changeable formaldehyde detection board - Google Patents
Manufacturing method of color-changeable formaldehyde detection board Download PDFInfo
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- CN103399010A CN103399010A CN201310383360XA CN201310383360A CN103399010A CN 103399010 A CN103399010 A CN 103399010A CN 201310383360X A CN201310383360X A CN 201310383360XA CN 201310383360 A CN201310383360 A CN 201310383360A CN 103399010 A CN103399010 A CN 103399010A
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Abstract
The invention provides a manufacturing method of a color-changeable formaldehyde detection board. The manufacturing method comprises the following process steps: (1), preparing an adsorbent active aluminum oxide, a binder sodium carboxymethyl cellulose, an indicator permanganate and a plastic base board; (2), enabling the mass ratio of the adsorbent to the binder to be 10:1, adding water for stirring to form paste and uniformly coating the paste on the plastic base board, wherein the thickness of the paste coating is 0.5 millimeter to 3 millimeters; (3), placing the coated plastic base board in a drying oven for heating up and activating at 100 DEG C-120 DEG C, taking out 1-3 hours later, and cooling to the room temperature; and (4), adding water into the indicator for preparing a solution with concentration of 3%-5%, soaking the activated plastic base board in the solution for 45-90 minutes, drying after the soaking to obtain the detection board, wherein the drying temperature is 100 DEG C-140 DEG C and the drying time is 1-3 hours. The manufacturing method of the color-changeable formaldehyde detection board has the advantages of being simple in usage, low in cost, obvious in color changing and the like, and is suitable for residents to detect the formaldehyde at home.
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, and the gas of intense stimulus type smell is arranged, soluble in water, pure and mild ether, formaldehyde is the magma poisonous substance, and 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 that finishing material and new composite furniture use, and 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, also can discharge formaldehyde after aging.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 can't use.In addition, some adopt the formaldehyde examination instrument of electrochemical process can detect at the scene easily concentration of formaldehyde, but the instrument cost of the type is high, safeguards complexity, needs the professional to operate, also inapplicable and common resident.Chinese patent CN1563954A discloses a kind of formaldehyde quick detection test paper, utilize the detection paper formaldehyde of dipping AHMT, hydroxide agent and potassium metaperiodate, but because AHMT is very unstable under alkali condition, the described Test paper of the method can not be preserved, and usability is poor; US Patent No. 4511658, disclosed method are first to form the supercarbonate precipitation on solid support, then with the acetone soln of AHMT, process the supercarbonate precipitation, then are exposed in air and detect concentration of formaldehyde; The disclosed method of Chinese patent 200610057924.0 is also that highly basic is loaded on holder, will drop on highly basic after AHMT and acid solution reaction.Above-mentioned several method all adopts the principle of AHMT and formaldehyde reaction colour developing, exist cost high, with formaldehyde reaction after before and after the unconspicuous shortcoming of contrast.
Summary of the invention
The present invention provides a kind of preparation method of formaldehyde examination plate of changeable colour in order to address the above 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), prepare 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, adds water and stirs and form pasty state, and pastel is evenly coated on plastic base, the thickness of pastel coating is the 0.5-3 millimeter;
(3), the plastic base that will coat is placed on 100-120 ℃ of heat-activated in drying box, takes out after 1-3 hour, is cooled to 25 ℃ of room temperatures;
(4), indicator added water be made into the solution that concentration is 3-5%, make after activation the plastic base dipping wherein, dip time is 45-90 minute, the dipping post-drying, bake out temperature is 100-140 ℃, the time is 1-3 hour, obtains check-out console;
Described adsorbent also can be silica gel, and the indicator permanganate comprises potassium permanganate, sodium permanganate;
Check-out console is positioned in environment to be detected during use, according to check-out console, by purple, becomes the concentration that the time russet judges formaldehyde fully, the variable color time be 4 hours with interior concentration of formaldehyde 〉=0.50ppm; The variable color time is 4-12 hour, concentration of formaldehyde 〉=0.10ppm, concentration of formaldehyde＜0.50ppm; The variable color 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 the septivalency manganate is purple and has strong oxidizing property, easily be reduced into the aobvious tawny of sexavalence manganese thereby run into after formaldehyde, according to the speed of indicator discoloration time can be rough the concentration of demonstration formaldehyde.This method has uses the advantages such as simple, that cost is low, variable color is obvious, is suitable for the resident and detects voluntarily formaldehyde at family expenses.
Embodiment
, for Comprehension and Implementation better, below describe a kind of preparation method of formaldehyde examination plate of changeable colour in detail: ready 1cm * 3cm plastic base is cleaned oven dry; After activated alumina, the mass ratio mixing of sodium carboxymethyl cellulose according to 10:1, add water and stir the formation pasty state, pastel evenly to be coated on plastic base, coating thickness is 1CM; The plastic base that coats is placed on 110 ℃ of activation in drying box takes out after 2 hours, put to room temperature, activation is a process that improves adsorbent activity, by heating, can remove absorbed moisture, increases the activity of adsorbent; The liquor potassic permanganate of configuration 3%, be placed therein dipping 45 minutes with the check-out console that coats; Check-out console after dipping is stand-by after 2 hours 120 ℃ of dryings.
With injecting certain density formaldehyde in the sealing experiment cabin, be placed into check-out console, find its after 2.4 hours coating all by purple, become tawny, detecting concentration of formaldehyde by methylene oxide detecting instrument is 0.78ppm.
With injecting certain density formaldehyde in the sealing experiment cabin, be placed into check-out console, find its after 6 hours coating all by purple, become tawny, detecting concentration of formaldehyde by methylene oxide detecting instrument is 0.34ppm.
With injecting certain density formaldehyde in the sealing experiment cabin, be placed into check-out console, find its after 24 hours coating all by purple, become tawny, detecting concentration of formaldehyde by methylene oxide detecting instrument is 0.03ppm.
Claims (3)
1. the preparation method of the formaldehyde examination plate of a changeable colour is characterized in that comprising following processing step:
(1), prepare 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, adds water and stirs and form pasty state, and pastel is evenly coated on plastic base, the thickness of pastel coating is the 0.5-3 millimeter;
(3), the plastic base that will coat is placed on 100-120 ℃ of heat-activated in drying box, takes out after 1-3 hour, is cooled to room temperature 24-26 ℃;
(4), indicator added water be made into the solution that concentration is 3-5%, make after activation the plastic base dipping wherein, dip time is 45-90 minute, the dipping post-drying, bake out temperature is 100-140 ℃, 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, is characterized in that described adsorbent also can be silica gel, and the 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, check-out console is positioned in environment to be detected while it is characterized in that using, become by purple the concentration that the time russet judges formaldehyde according to check-out console fully, the variable color time be 4 hours with interior concentration of formaldehyde 〉=0.50ppm; The variable color time is 4-12 hour, concentration of formaldehyde 〉=0.10ppm, concentration of formaldehyde＜0.50ppm; The variable color 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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| CN103399010A true CN103399010A (en) | 2013-11-20 |
| CN103399010B CN103399010B (en) | 2015-09-30 |
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Cited By (6)
| 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 |
| 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 |
| CN105424694A (en) * | 2015-12-16 | 2016-03-23 | 无锡吉进环保科技有限公司 | Formaldehyde detection reagent |
| 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 |
| CN108484414A (en) * | 2018-05-03 | 2018-09-04 | 北京化工大学 | A kind of formaldehyde fluorescence probe and formaldehyde examination piece and preparation method thereof based on tetraphenylethylene, formaldehyde examination piece application method |
| 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 |
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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 (8)
| 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 |
| 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 |
| CN105424694A (en) * | 2015-12-16 | 2016-03-23 | 无锡吉进环保科技有限公司 | Formaldehyde detection reagent |
| 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 |
| CN108484414A (en) * | 2018-05-03 | 2018-09-04 | 北京化工大学 | A kind of formaldehyde fluorescence probe and formaldehyde examination piece and preparation method thereof based on tetraphenylethylene, formaldehyde examination piece application method |
| 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 |
| 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 |
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| CN103399010B (en) | 2015-09-30 |
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