CN101226154A - Indicating substance for on-line testing formaldehyde oxide gas concentration - Google Patents
Indicating substance for on-line testing formaldehyde oxide gas concentration Download PDFInfo
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- CN101226154A CN101226154A CNA2008100638816A CN200810063881A CN101226154A CN 101226154 A CN101226154 A CN 101226154A CN A2008100638816 A CNA2008100638816 A CN A2008100638816A CN 200810063881 A CN200810063881 A CN 200810063881A CN 101226154 A CN101226154 A CN 101226154A
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- gas concentration
- indicator
- indicator substance
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- formaldehyde gas
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Abstract
The invention relates to an indicator for on-site detecting formaldehyde gas density, which is composed of a main agent, a promoter, an interface modifier and a carrier, wherein the main agent is the mixture of acid hydroxylamine and hydrogen ion density indicator. The invention can realize online detection by arranging the material into a detector which can quantitatively display different formaldehyde gas densities. The detector prepared with the material has simple and sensitive detection method with low cost.
Description
Technical field:
The present invention relates to a kind of indicator substance that detects harmful gas concentration, concrete is the material that can indicate air formaldehyde concentration.
Background technology:
Along with the rise of house decoration, a large amount of uses of ornament materials must cause room air pollution, wherein the pollution that causes of formaldehyde people's attention extremely.Content of formaldehyde in room air is 0.1mg/m
3The time peculiar smell and sense of discomfort just arranged; 0.5mg/m
3In time, can stimulate eyes to cause to shed tears; 0.6mg/m
3Shi Yinqi throat discomfort or pain; Concentration again Gao Shike cause nausea, vomit, cough, uncomfortable in chest, asthma even pulmonary emphysema; 30mg/m
3The time, can cause death at once.For this reason, many countries have all made guiding limit value regulation to airborne concentration of formaldehyde, and the concentration of regulation formaldehyde in indoor air should not surpass 0.1mg/m in " the IAQ (indoor air quality) standard " of China's issue on March 1st, 2003
3
The conventional method of measuring content of formaldehyde in the air is generally used large-scale instrument at present.Its advantage comprises that mensuration is highly sensitive, quantitatively accurately.But the determination step complexity needs professional's operation, and therefore mensuration expense height is difficult for popularizing.
In order to satisfy the needs of on-line testing, some portable methylene oxide detecting instrument devices have also appearred on the market, as the PPM400 type formaldehyde determination instrument of Britain and the INTERSCAN4160 type formaldehyde determination instrument of the U.S. is to design according to electrochemical principle, the on-the-spot formaldehyde determination instrument of portable 101 types that utilize the phenol reagent colorimetric principle to make in addition.These instruments cost an arm and a leg, and Sensitive Apparatus is short serviceable life, all is not suitable for simple and easy monitoring and uses.
Chinese patent discloses several Simple Design schemes.A kind of as having announced in the patent 02285930.6 (applying date 2002.11.12) " formaldehyde colorimetric speed is surveyed bag in the disposable air ", respectively with diacetone or phenol reagent or 4-amino-3-hydrazine-5-sulfydryl-1,2,4-triazole (AHMT) reagent is made developer, formaldehyde fast detecting product in the market belongs to this type of more, it is not obvious to there is change color, the problem that temperature influence is bigger; Patent 200410017701.2 (applying date 2004.04.15) has been announced a kind of " formaldehyde repid test test paper in the air ", and such test paper needs all to determine the result by visual colorimetry that individual difference is bigger, causes accuracy reduction as a result; Patent 200420084922.7 (applying date 2004.07.28) has been announced a kind of " formaldehyde gas detector tube ", it adopts formaldehyde and the reaction of benzene series thing to generate brown material and detects formaldehyde gas, with sulfuric acid as catalyzer, it is lower to there is sensitivity, and the benzene series thing easily influences shortcomings such as discriminating with sulfuric acid generation sulfonating reaction.
Summary of the invention:
Technical matters to be solved by this invention is at ubiquitous problem in the prior art, and a kind of quantitatively accurate, obvious, highly sensitive indicator substance that can be used for online detection formaldehyde gas concentration of change color is provided.
For achieving the above object, formaldehyde gas concentration indicator substance of the present invention is made up of host, auxiliary agent, interface modifier and 90-100 purpose carrier, wherein host is the potpourri of acid hydroxylamine salt and pH indicator, auxiliary agent is the buffer solution that highly basic and salt thereof are formed, and interface modifier is the chlorination metallic salt; Each component by following proportioning is in the indicator substance:
Host: auxiliary agent (volume ratio)=100～150: 1～3
Host: interface modifier (weight ratio)=100～150: 1～5
(host+auxiliary agent+interface modifier): carrier (volume: weight)=100～150: 100～120
Described host is to be that 1% acid hydroxylamine salt aqueous solution and concentration are 0.1% pH indicator ethanolic solution by concentration, and be by volume (5～10): 100 ratio mixes and forms.
Described acid hydroxylamine salt is a kind of of Hydroxylamine sulfate or its salt or oxammonium hydrochloride or its salt.
Described pH indicator is a kind of in tropeolin G, alizarin yellow, the methyl yellow.
Described buffer solution is the Na of 0.1mol/L
2CO
3NaHCO with 0.1mol/L
3Solution is in 1: 1 ratio mixing or the Na of 0.1mol/L
2CO
3Mix in 1: 1 ratio with 0.1mol/L NaOH.
Described interface modifier is BaCl
22H
2O, MgCl
26H
2O, AlCl
36H
2O and ZnCl
2In a kind of.
Described carrier is a kind of in silica gel, silica sand, the pottery.
The preparation method of indicator substance:
Measure host, auxiliary agent, interface modifier and carrier by above-mentioned indicator substance proportioning; Interface modifier is put into host and auxiliary agent dissolving back mixing, pour an amount of carrier again into, make it, be tiled in container bottom just by solution-wet, the black out vacuum drying, sealing is preserved.
The principle that this indicator substance can be implemented in line detection formaldehyde gas concentration is:
The formaldehyde hydroxylamine salt that can reduce sourness, its reaction equation is as follows:
2HCHO+(NH
2OH)
2·H
2SO
4→2H
2C＝NOH+H
2SO
4+2H
2O
As everyone knows, as above the acid of Chan Shenging can make pH indicator generation change color, and what of change color are by the decision of the concentration of acid, and the concentration of acid depends on the concentration of formaldehyde, so this indicator substance can realize detecting the function of formaldehyde gas concentration.
Wherein the pH indicator is easy to be subjected to CO in the air
2Influence, add buffer solution and avoid airborne CO exactly
2Disturb, prevent variable color before tubulature.
The effect of interface modifier is exactly to make the variable color interface obvious, clear, is easy to reading.
Indicator is adsorbed on the carrier, serves as the variable color post.
Indicator substance detects the using method of formaldehyde gas:
The present invention can put into the transparent tube of sealing an end with the diffusion control film, and is real with hard thing pier, seals the other end of transparent tube again, makes easy badge type detecting device in conjunction with concentration contrast scale then.Place it in the cabinet during use, drawer is interior, indoor, desk is first-class, absorbing formaldehyde and the generation change color of (the use tropeolin G is made indicator) from the yellow to the deep pink fast just can contrast in concentration according to variable color length and to read concentration of formaldehyde on the scale.
The detection optimum range of this invention is 0.1mg/m
3～100.0mg/m
3, measuring error is in 10%.
Described transparent tube length is 30～50mm, and internal diameter is 2.0～3.0mm, the best when external diameter is 4.0～6.0mm.Described transparent tube two ends control diffusion barrier can adopt polyester film, and its thickness is 1mm the best.
The method for making of aforesaid concentration contrast scale: fix 8 hour detection time, to variable color segment length curve plotting, can obtain the calibration curve of the formaldehyde detection components under this detection time with concentration of formaldehyde.Make concentration contrast scale according to the concentration of calibration curve round numbers variable color length correspondence.
Formaldehyde gas concentration indicator substance of the present invention can be applied to the detecting device of other form, is not limited to aforesaid badge type detecting device.
Technique effect of the present invention is:
1,, can be used to detect the formaldehyde gas of variable concentrations according to the difference of host proportioning in the indicator substance;
2, this invention need not power, and is highly sensitive, but long preservation;
3, change color boundary clear, vision is obvious;
4, this invention is with low cost, and preparation technology is simple, and is easy to use.
Embodiment:
The invention will be further described below in conjunction with embodiment.
Host: 1% Hydroxylamine sulfate salt (Beijing Chemical Plant) and 0.1% tropeolin G acid indicator (Shanghai fragrant bright examination Chemical Industry Science Co., Ltd), two solution ratios are (5～10): 100 (volume ratios).
1% Hydroxylamine sulfate solution (solution 1): the 1g Hydroxylamine sulfate is dissolved in the 100ml distilled water.
Tropeolin G indicator (solution 2): 0.1g tropeolin G indicator (its variable color pH value scope is 1.2～2.3) is dissolved in the 100ml ethanol.
The Na of auxiliary agent: 0.1mol/L
2CO
3NaHCO with 0.1mol/L
3The buffer solution that solution is formed in 1: 1 ratio, the pH value is 8.94;
Carrier: 90-100 purpose silica gel (Shanghai the May 4th chemical reagent factory) high temperature batter behind the calcination 2-4h in 400-600 ℃ of muffle furnace.
Interface modifier: MgCl
26H
2O and ZnCl
2(sky, Tianjin reaches the scavenging material fine chemistry industry).
Embodiment 1
Above-mentioned solution 1 and solution 2 mixed in the ratio of 1: 10 (volume ratio) obtain host 110mL.Press 3% of mixed solution cumulative volume and add 3.4mL Na
2CO
3-NaHCO
3Buffer solution (the pH value is 8.94) takes by weighing the interface modifier MgCl of 3.5g again by 3% of mixed solution gross mass
26H
2O must mix indication solution, and it is standby to put into brown reagent bottle.Get and mix indication solution 0.15mL, the 0.11g silica-gel carrier is poured into it is soaked evenly reach saturatedly, make indicator substance, natural air drying, sealing is preserved.
The indicator substance for preparing is made badge type detecting device, put into environment to be detected 8 hours, determine the concentration of indoor formaldehyde according to the variable color length contrast concentration scale of variable color post in 8 hours detecting devices.
The detection optimum range of this detecting device is 0.1-100mg/m
3, measuring error is in 10%.
Embodiment 2
Solution 1 and solution 2 mixed in the ratio of 1: 10 (volume ratio) obtain host 110mL.Press 4% of mixed solution cumulative volume and add 4.6mL Na
2CO
3-NaHCO
3Buffer solution (the pH value is 8.94) takes by weighing the interface modifier ZnCl of 2.3g again by 2% of mixed solution gross mass
2, must mix indication solution, it is standby to put into reagent bottle.Get and mix indication solution 0.15mL, the 0.11g silica-gel carrier is poured into it is soaked evenly reach saturatedly, make indicator substance, natural air drying, sealing is preserved.
The indicator substance for preparing is made badge type detecting device, and it is 0.1-100mg/m that this detecting device detects optimum range
3, measuring error is in 10%.
Embodiment 3
Solution 1 and solution 2 mixed in the ratio of 7: 100 (volume ratio) obtain host 107mL.Press 3% of mixed solution cumulative volume and add 3.3mL Na
2CO
3-NaHCO
3Buffer solution (the pH value is 8.94) takes by weighing the interface modifier MgCl of 3.4g again by 3% of mixed solution gross mass
26H
2O must mix indication solution, and it is standby to put into brown reagent bottle.Get and mix indication solution 0.15mL, the 0.11g silica-gel carrier is poured into it is soaked evenly reach saturatedly, make indicator substance, natural air drying, sealing is preserved.
The indicator substance for preparing is made badge type detecting device, and the detection optimum range is 0.1-80mg/m
3, measuring error is in 10%.
Embodiment 4
Solution 1 and solution 2 mixed in the ratio of 7: 100 (volume ratio) obtain host 107mL.Press 4% of mixed solution cumulative volume and add 4.4mL Na
2CO
3-NaHCO
3Buffer solution (the pH value is 8.94) takes by weighing the interface modifier ZnCl of 2.3g again by 2% of mixed solution gross mass
2, must mix indication solution, it is standby to put into brown reagent bottle.Get and mix indication solution 0.15mL, the 0.11g silica-gel carrier is poured into it is soaked evenly reach saturatedly, make indicator substance, natural air drying, sealing is preserved.
The indicator substance for preparing is made badge type detecting device, and the detection optimum range is 0.1-80mg/m
3, measuring error is in 10%.
Claims (7)
1. the indicator substance that can be used for online detection formaldehyde gas concentration, form by host, auxiliary agent, interface modifier and 90-100 purpose carrier, wherein host is the potpourri of acid hydroxylamine salt and pH indicator, auxiliary agent is the buffer solution that highly basic and salt thereof are formed, and interface modifier is the chlorination metallic salt; Each component by following proportioning is in the indicator substance:
Host: auxiliary agent (volume ratio)=100～150: 1～3
Host: interface modifier (weight ratio)=100～150: 1～5
(host+auxiliary agent+interface modifier): carrier (volume: weight)=100～150: 100～120.
2. according to the described indicator substance that can be used for online detection formaldehyde gas concentration of claim 1, it is characterized in that: described host is to be that 1% acid hydroxylamine salt aqueous solution and concentration are 0.1% pH indicator ethanolic solution by concentration, and be by volume (5～10): 100 ratio mixes and forms.
3. according to the described indicator substance that can be used for online detection formaldehyde gas concentration of claim 2, it is characterized in that: described acid hydroxylamine salt is a kind of in Hydroxylamine sulfate salt or the oxammonium hydrochloride salt.
4. according to claim 1 or 2 described formaldehyde gas concentration indicator substance, it is characterized in that: described pH indicator is a kind of in tropeolin G, alizarin yellow, the methyl yellow.
5. according to claim 1 or 2 described formaldehyde gas concentration indicator substance, it is characterized in that: described buffer solution is the Na of 0.1mol/L
2CO
3NaHCO with 0.1mol/L
3Solution is in 1: 1 ratio mixing or the Na of 0.1mol/L
2CO
3Mix in 1: 1 ratio with 0.1mol/L NaOH.
6. according to claim 1 or 2 described formaldehyde gas concentration indicator substance, it is characterized in that: described interface modifier is BaCl
22H
2O, MgCl
26H
2O, AlCl
36H
2O and ZnCl
2In a kind of.
7. according to claim 1 or 2 described formaldehyde gas concentration indicator substance, it is characterized in that: described carrier is a kind of in silica gel, silica sand, the pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100638816A CN101226154A (en) | 2008-01-21 | 2008-01-21 | Indicating substance for on-line testing formaldehyde oxide gas concentration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100638816A CN101226154A (en) | 2008-01-21 | 2008-01-21 | Indicating substance for on-line testing formaldehyde oxide gas concentration |
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| Publication Number | Publication Date |
|---|---|
| CN101226154A true CN101226154A (en) | 2008-07-23 |
Family
ID=39858274
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|---|---|---|---|
| CNA2008100638816A Pending CN101226154A (en) | 2008-01-21 | 2008-01-21 | Indicating substance for on-line testing formaldehyde oxide gas concentration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172466A (en) * | 2011-04-02 | 2011-09-07 | 陈志朋 | Formaldehyde processing liquid for furniture |
| CN103969252A (en) * | 2013-01-30 | 2014-08-06 | 上海市上海中学 | Rose-variety flower extract-containing formaldehyde color-change indicator |
| CN105044002A (en) * | 2015-06-30 | 2015-11-11 | 苏州东辰林达检测技术有限公司 | Formaldehyde detection reagent and preparation method thereof |
| CN106284885A (en) * | 2016-08-22 | 2017-01-04 | 桐乡嘉力丰实业股份有限公司 | A kind of colour changing wall paper pointing out concentration of formaldehyde and preparation technology thereof |
| CN106368081A (en) * | 2016-08-30 | 2017-02-01 | 桐乡嘉力丰实业股份有限公司 | Color-changing embroidery wallpaper with formaldehyde reminding function and preparation technology thereof |
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2008
- 2008-01-21 CN CNA2008100638816A patent/CN101226154A/en active Pending
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| CN102172466A (en) * | 2011-04-02 | 2011-09-07 | 陈志朋 | Formaldehyde processing liquid for furniture |
| CN103969252A (en) * | 2013-01-30 | 2014-08-06 | 上海市上海中学 | Rose-variety flower extract-containing formaldehyde color-change indicator |
| CN105044002A (en) * | 2015-06-30 | 2015-11-11 | 苏州东辰林达检测技术有限公司 | Formaldehyde detection reagent and preparation method thereof |
| CN106284885A (en) * | 2016-08-22 | 2017-01-04 | 桐乡嘉力丰实业股份有限公司 | A kind of colour changing wall paper pointing out concentration of formaldehyde and preparation technology thereof |
| CN106368081A (en) * | 2016-08-30 | 2017-02-01 | 桐乡嘉力丰实业股份有限公司 | Color-changing embroidery wallpaper with formaldehyde reminding function and preparation technology thereof |
| CN108132249A (en) * | 2016-12-01 | 2018-06-08 | 中国科学院大连化学物理研究所 | A kind of method that chlorion in water is measured using indicator displacement method |
| CN108132249B (en) * | 2016-12-01 | 2021-02-02 | 中国科学院大连化学物理研究所 | Method for determining chloride ions in water by using indicator displacement method |
| CN108776132A (en) * | 2018-04-18 | 2018-11-09 | 沈阳理工大学 | The simple test paper of ammonia and its preparation and assay method in a kind of measurement air |
| CN108535246A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | The test paper of semiquantitative determination ammonia concentration in air and its preparation and assay method |
| CN108535248A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | A kind of test paper and its preparation and detection method of detection ammonia concentration in air |
| CN108535247A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | The sensitive test paper of ammonia and its preparation and assay method in a kind of measurement air |
| CN108802022A (en) * | 2018-04-18 | 2018-11-13 | 沈阳理工大学 | The simple measuring test paper of ammonia and its preparation and assay method in a kind of air |
| CN108802022B (en) * | 2018-04-18 | 2021-01-08 | 沈阳理工大学 | Simple test paper for measuring ammonia in air and preparation and measuring method thereof |
| CN108535247B (en) * | 2018-04-18 | 2021-01-08 | 沈阳理工大学 | Sensitive test paper for measuring ammonia in air and preparation and determination methods thereof |
| CN108535248B (en) * | 2018-04-18 | 2021-01-08 | 沈阳理工大学 | Test paper for detecting ammonia concentration in air and preparation and detection methods thereof |
| CN108508008A (en) * | 2018-04-18 | 2018-09-07 | 沈阳理工大学 | The test paper of ammonia and its preparation and assay method in a kind of quantitative determination air |
| CN109115757A (en) * | 2018-07-11 | 2019-01-01 | 沈阳理工大学 | A kind of test paper and measuring method measuring copper concentration |
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| 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 |
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Open date: 20080723 |