CN106841193A - A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde - Google Patents
A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde Download PDFInfo
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- CN106841193A CN106841193A CN201710061869.0A CN201710061869A CN106841193A CN 106841193 A CN106841193 A CN 106841193A CN 201710061869 A CN201710061869 A CN 201710061869A CN 106841193 A CN106841193 A CN 106841193A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/79—Photometric titration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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Abstract
The present invention relates to concentration of formaldehyde technical field of measurement and test, a kind of preparation method of test solution is in particular disclosed；Including：The crystallization basic fuchsin of 0.1g to 1g is weighed, powdering is fully ground, and is dissolved in 60 to 600ml, during temperature is 60 to 100 DEG C of hot water, form solution；The solution is constantly stirred using glass bar, makes pinkish red fully dissolving；The solution after by cooling is filtered；To by the filtrate after filtering, adding 10 to 100mL, concentration is 5% sodium sulfite solution；When the color of sodium sulfite solution is thin out to pink by aubergine, 1 to 10mL concentrated hydrochloric acids are added, form test solution, and preserve in the cool；The invention also discloses a kind of method of the detection concentration of formaldehyde for applying test solution prepared by above-mentioned preparation method；The preparation method low cost of embodiment of the present invention test solution, preparation are simple；Detect formaldehyde gas concentration method is easy to operate, the degree of accuracy is high, it is practical.
Description
Technical field
The present invention relates to concentration of formaldehyde technical field of measurement and test, more particularly to a kind of preparation method and application of test solution should
The method that test solution tests concentration of formaldehyde.
Background technology
Because air pollution problems inherent is the hot issue of current environment research field, wherein formaldehyde has strong impulse
Property, is a kind of carcinogen, is also important organic pollution in a kind of air ambient, and formaldehyde wide material sources, jeopardize
The mankind's is healthy, therefore formaldehyde pollution air is just little by little taken seriously, while country also puts into effect corresponding country's mark
Standard ensures the quality of air.
To obtain the concentration of formaldehyde in air gas in time, occurs the instrument dress of formaldehyde repid test on the market at present
Put, for determining concentration of formaldehyde at the scene, but due to the apparatus high cost, and complex operation, therefore there is greatly improvement
Space.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of low cost, prepare simple test solution
Preparation method, and the method that easy to operate, the degree of accuracy application high test solution tests concentration of formaldehyde.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions：
In the present invention, there is provided a kind of preparation method of test solution, the preparation method is comprised the following steps：
The crystallization basic fuchsin of 0.1g to 1g is weighed, powdering is fully ground, and is dissolved in 60 to 600ml, temperature is
In 60 to 100 DEG C of hot water, solution is formed；
The solution is constantly stirred using glass bar, makes pinkish red fully dissolving；
The solution after by cooling is filtered；
To by the filtrate after filtering, adding 10 to 100mL, concentration is 5% sodium sulfite solution；
When the color of sodium sulfite solution is thin out to pink by aubergine, 1 to 10mL concentrated hydrochloric acids are added, form test
Solution, and preserve in the cool.
The embodiment of the present invention additionally provides a kind of method for detecting formaldehyde gas concentration, and methods described includes：
In the confined space containing formaldehyde gas, spot plate is placed；
By the test solution, it is added dropwise in the spot plate, and start timing；
Obtain on the spot plate, fuchsin sulfite by yellowish discoloration to aubergine Coloring Time；
According to acquired Coloring Time, by preset formula, the concentration of formaldehyde gas is obtained, the preset formula is：
Y=7.6342e-0.00738x；
Wherein, X is Coloring Time, and Y is the concentration of formaldehyde gas.
In the embodiment of the present invention, a certain amount of magenta is positioned in water, and adds sodium sulfite solution and the concentrated sulfuric acid,
Form test solution；And during test solution point dropped in into spot plate, reacted according to the test solution on spot plate and formaldehyde, lead to
Cross Coloring Time and preset formula conversion, you can the quick concentration for measuring formaldehyde, therefore, the preparation side of test solution of the invention
Method low cost, preparation are simple；Detect formaldehyde gas concentration method is easy to operate, the degree of accuracy is high, it is practical.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, drawings in the following description are only some accompanying drawings of the embodiment of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, can also obtain other attached according to these accompanying drawings
Figure.
Fig. 1 is a kind of schematic flow sheet of the embodiment of the preparation method of test solution of the invention；
Fig. 2 is a kind of schematic flow sheet of the embodiment of method for detecting formaldehyde gas concentration of the invention；
Fig. 3 is the tendency chart of the Coloring Time-concentration of formaldehyde drawn according to preset formula in the present invention.
Specific embodiment
In the present invention, the test solution prepared by the present embodiment is used to detect the concentration of formaldehyde gas, as shown in figure 1, being
A kind of schematic flow sheet of the embodiment of the preparation method of test solution of the invention；This prepares the method for test solution, including
Following steps：
S101, weighs the crystallization basic fuchsin of 0.1g to 1g, is fully ground powdering, and is dissolved in 60 to 600ml, temperature
Spend in the hot water for 60 to 100 DEG C, form solution；
S102, the solution is constantly stirred using glass bar, makes pinkish red fully dissolving；
S103, by cooling after the solution filtered；
S104, to by the filtrate after filtering, adding 10 to 100mL, concentration is 5% sodium sulfite solution；
S105, when the color of sodium sulfite solution is thin out to pink by aubergine, adds 1 to 10mL concentrated hydrochloric acids, shape
Into test solution, and preserve in the cool.
Preferably, in step S101, the crystallization basic fuchsin of 0.2g is weighed, is fully ground powdering, and be dissolved in
120ml, during temperature is 80 DEG C of hot water, forms solution；
Preferably, in step S104, to by the filtrate after filtering, adding 20mL, concentration be 5% sodium sulfite it is molten
Liquid.
Preferably, in step S105, when the color of sodium sulfite solution is thin out to pink by aubergine, 20mL is added
Concentrated hydrochloric acid, forms test solution, and preserve in the cool.
Therefore, the preparation method low cost of the test solution of the present embodiment, preparation are simple, practical.
As shown in Fig. 2 being a kind of schematic flow sheet of the embodiment of the method for detecting formaldehyde gas concentration of the invention；This
Test solution is applied in embodiment, the test solution is according to a kind of preparation method preparation of test solution of the invention
Into methods described includes：
S201, in the confined space containing formaldehyde gas, places spot plate；
S202, the test solution is added dropwise in the spot plate, and start timing；
S203, obtains on the spot plate, fuchsin sulfite by yellowish discoloration to aubergine Coloring Time；
As shown in figure 3, being the tendency chart of the Coloring Time-concentration of formaldehyde in the present invention according to preset formula drafting.
In the present invention, S204, according to acquired Coloring Time, by preset formula, obtains the concentration of formaldehyde gas, institute
Stating preset formula is：
Y=7.6342e-0.00738x；
Wherein, X is Coloring Time, and Y is the concentration of formaldehyde gas.
Exemplary, in the present invention, formaldehyde gas concentration is detected, following several groups of tests have been carried out, and test data is obtained,
And according to international, concentration of formaldehyde is measured by GB AAS, contrasted：
Test 1：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 223s, and concentration of formaldehyde is measured for 1.670mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 1.472mg/m3。
Test 2：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 249s, and concentration of formaldehyde is measured for 1.500mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 1.215mg/m3。
Test 3：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 318s, and concentration of formaldehyde is measured for 0.7520mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 0.7303mg/m3。
Test 4：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 402s, and concentration of formaldehyde is measured for 0.5200mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 0.3929mg/m3。
Test 5：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 403s, and concentration of formaldehyde is measured for 0.4281mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 0.3900mg/m3。
Test 6：
In the confined space of the formaldehyde with unknown concentration, test solution is added dropwise in spot plate, starts timing, to side
Edge changes colour, and stops timing, and the time is 525s, and concentration of formaldehyde is measured for 0.2040mg/m by GB AAS3, and by gained
Mathematical Modeling to calculate concentration of formaldehyde now be 0.1585mg/m3。
Therefore, the concentration of formaldehyde of the method test according to the present embodiment enters with the concentration of formaldehyde measured by international spectrophotometric
Row contrast, obtains following form：
Therefore, the method for detection formaldehyde gas concentration of the invention, detects the method operation letter of formaldehyde gas concentration
Just, the degree of accuracy is high, practical.
Content described in the above present invention, it is any to be familiar with this skill only using the embodiment of the technology of the present invention content
Modification, change that skill person is done with the present invention, all belong to the scope of the claims that the present invention advocates, and are not limited to disclosed in embodiment
Content.
Claims (5)
1. a kind of preparation method of test solution, the test solution is used to detect the concentration of formaldehyde gas, it is characterised in that institute
Preparation method is stated to comprise the following steps：
Weigh the crystallization basic fuchsin of 0.1g to 1g, be fully ground powdering, and be dissolved in 60 to 600ml, temperature be 60 to
In 100 DEG C of hot water, solution is formed；
The solution is constantly stirred using glass bar, makes pinkish red fully dissolving；
The solution after by cooling is filtered；
To by the filtrate after filtering, adding 10 to 100mL, concentration is 5% sodium sulfite solution；
When the color of sodium sulfite solution is thin out to pink by aubergine, 1 to 10mL concentrated hydrochloric acids are added, form test molten
Liquid, and preserve in the cool.
2. preparation method as claimed in claim 1, it is characterised in that the crystallization basic fuchsin for weighing 0.1g to 1g, fills
Point powdery is ground to form, and be dissolved in 60 to 600ml, included during temperature is 60 to 100 DEG C of hot water, the step of form solution：
The crystallization basic fuchsin of 0.2g is weighed, powdering is fully ground, and is dissolved in 120ml, during temperature is 80 DEG C of hot water,
Form solution.
3. preparation method as claimed in claim 2, it is characterised in that it is described to by the filtrate after filtering, add 10 to
100mL, includes the step of concentration is 5% sodium sulfite solution：
To by the filtrate after filtering, adding 20mL, concentration is 5% sodium sulfite solution.
4. preparation method as claimed in claim 3, it is characterised in that the color for treating sodium sulfite solution is by purplish red discoloration
When light to pink, add 1 to 10mL concentrated hydrochloric acids, formed test solution, and in the cool preserve the step of include：
When the color of sodium sulfite solution is thin out to pink by aubergine, 20mL concentrated hydrochloric acids are added, form test solution, and
Preserve in the cool.
5. a kind of method for detecting formaldehyde gas concentration, methods described applies test solution, and the test solution is according to as weighed
Profit requires that the preparation method any one of 1 to 4 is prepared from, it is characterised in that methods described includes：
In the confined space containing formaldehyde gas, spot plate is placed；
By the test solution, it is added dropwise in the spot plate, and start timing；
Obtain on the spot plate, fuchsin sulfite by yellowish discoloration to aubergine Coloring Time；
According to acquired Coloring Time, by preset formula, the concentration of formaldehyde gas is obtained, the preset formula is：
Y=7.6342e-0.00738x；
Wherein, X is Coloring Time, and Y is the concentration of formaldehyde gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710061869.0A CN106841193A (en) | 2017-01-27 | 2017-01-27 | A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710061869.0A CN106841193A (en) | 2017-01-27 | 2017-01-27 | A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde |
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| CN106841193A true CN106841193A (en) | 2017-06-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406505A (en) * | 2018-11-27 | 2019-03-01 | 湖北建研科峰工程质量检测有限公司 | Method for fast measuring formaldehyde concentration |
Citations (4)
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| CN101000310A (en) * | 2007-01-15 | 2007-07-18 | 浙江大学 | Method for investigating formol |
| CN102175671A (en) * | 2010-12-22 | 2011-09-07 | 北京理工大学 | Schiff's reagent suitable for fast measuring formaldehyde in indoor air of family |
| CN103105461A (en) * | 2012-11-13 | 2013-05-15 | 青岛海颐天仪器有限公司 | Portable kit for rapidly measuring formaldehyde in domestic bedroom air |
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2017
- 2017-01-27 CN CN201710061869.0A patent/CN106841193A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000310A (en) * | 2007-01-15 | 2007-07-18 | 浙江大学 | Method for investigating formol |
| CN102175671A (en) * | 2010-12-22 | 2011-09-07 | 北京理工大学 | Schiff's reagent suitable for fast measuring formaldehyde in indoor air of family |
| CN103105461A (en) * | 2012-11-13 | 2013-05-15 | 青岛海颐天仪器有限公司 | Portable kit for rapidly measuring formaldehyde in domestic bedroom air |
| CN105388153A (en) * | 2015-11-30 | 2016-03-09 | 湖北微控生物科技有限公司 | Rapid qualitative analysis method of formaldehyde in glutaraldehyde |
Non-Patent Citations (1)
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| 张秀敏 等: "品红亚硫酸钠试剂在快速检测甲醛中的应用", 《沈阳农业大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406505A (en) * | 2018-11-27 | 2019-03-01 | 湖北建研科峰工程质量检测有限公司 | Method for fast measuring formaldehyde concentration |
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Application publication date: 20170613 |