CN106841192B - A kind of diazepine structure directing agent detection carbaldehyde Method and its application - Google Patents
A kind of diazepine structure directing agent detection carbaldehyde Method and its application Download PDFInfo
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- CN106841192B CN106841192B CN201710253133.3A CN201710253133A CN106841192B CN 106841192 B CN106841192 B CN 106841192B CN 201710253133 A CN201710253133 A CN 201710253133A CN 106841192 B CN106841192 B CN 106841192B
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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
- G01N21/783—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 for analysing gases
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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
- G01N2021/775—Indicator and selective membrane
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Abstract
The invention belongs to environmental testings, and in particular to a kind of diazepine structure directing agent detection carbaldehyde Method and its application；Carrier with diazepine structure directing agent is placed in tested sample or contact surface, the variation of observation carrier or mixed solution color detect the concentration of formaldehyde.Advantage of the present invention are as follows: test condition is mild, is not required to strong acid or strong base catalyst, does not need extemporaneous preparation test fluid, indicator itself is without obvious smell.
Description
Technical field
The invention belongs to environmental testings, and in particular to a kind of diazepine structure directing agent detection carbaldehyde Method and its
Using.
Background technique
Modern Family's decoration largely uses artificial board, the adhesive using formaldehyde as raw material is also just used, by wood waste
It is broken into fiber or graininess composes plate.One major class adhesive is mainly exactly the urine aldehyde tree that formaldehyde and urea are polymerized
Rouge can play a part of to bond timber, but some residual onboard releases, i.e., resins synthesis when react it is insufficient and
It is left behind to have neither part nor lot in the free formaldehyde of reaction and gradually discharge；In addition the slow decomposition of pollopas in plate use process releases
It releases.The release of formaldehyde and environment temperature and humidity hold direct ratio, and temperature is higher, and humidity is bigger, and burst size of methanal is bigger.
When formaldehyde reaches a certain concentration indoors, people just has sense of discomfort, is greater than 0.08m3Aldehyde concentration can cause to be envious, eye
Itch, throat discomfort.For a long time, low concentration Formaldehyde Exposed can cause headache, dizzy, immunity reduction or neurasthenia, mental depression；
Long Term Contact formaldehyde can cause respiratory dysfunction and hepatogenotoxicity lesion, show as hepatocellular injury, liver radiation energy exception etc.
And cause gene mutation, chromosome damage, the fracture of mammal nuclear.
Current formaldehyde analysis, is analyzed mainly by special instrument, for example, electrochemistry, gas-chromatography, mass spectrum, spectrophotometric,
Chemiluminescence etc., it is necessary to which the testing agency for spending huge fund that please possess professional technique equipment visits measurement data, is unfavorable for common family
Front yard and general office unit are promoted the use of；Though chromogenic reaction has original application advantage using upper in molecular probe, also there is one
A little companies develop the formaldehyde formulations box based on chromogenic reaction, but in the prevalence of severe reaction conditions, strong acid or highly basic are needed to urge
Change, reagent itself has larger peculiar smell.
Summary of the invention
To solve above-mentioned prior art formaldehyde examination severe reaction conditions, the big disadvantage of reagent peculiar smell, the present invention provides one
Kind diazepine structure directing agent detects carbaldehyde Method.
The technical solution of the present invention is as follows:
A kind of diazepine structure directing agent detection carbaldehyde Method, reacts face with formaldehyde by diazepine structure directing agent
The concentration of the variation detection formaldehyde of color, the structural formula of indicator are as follows:
A kind of diazepine structure directing agent detection carbaldehyde Method, includes the following steps:
(1) prepare test specimens to be checked；
(2) it disperses diazepine structure directing agent in carrier；
(3) gained in step (2) is placed in tested sample (1) or is connect with the carrier of diazepine structure directing agent
Touch surface；Observing carrier or mixed solution color becomes orange-yellow to orange from colourless, orange-yellow according to carrier or mixed solution
To orange shade degree, concentration of formaldehyde is judged.
Obtained product color change detection concentration of formaldehyde is reacted with formaldehyde according to diazepine structure directing agent,
The one-dimensional stretching, extension linear polymer structural formula of product:
Further, it is described generate analyte detection its visible spectral range principal absorption wavelength be 400~580nm.
Further, concentration of formaldehyde is greater than 0.1ppm in the test specimens to be checked.
Further, the carrier is water, ethyl alcohol, glycerol, paper, kaolin, aluminium oxide, aluminium hydroxide, silica, silicon
The mixing of one or more of glue, zeolite, molecular sieve, attapulgite, clay and carclazyte.
Further, when the indicator uses and the mass percent of carrier is 0.01~100%.
A kind of application of diazepine structure directing agent detection formaldehyde.
A kind of indicator based on diazepine structure reacts Discoloration mechanism with formaldehyde, and indicator and formaldehyde occur
Hantzsh reaction is generated with larger conjugated system dihydropyridine heterocycle structure, and it is following that difunctional reaction generates it
The linear polymer of the one-dimensional stretching, extension of structure, makes its conjugated system have bigger expansion, has dark and spectral red shift effect.
Product is 400~580nm in the principal absorption wavelength of visible spectral range, and wavelength is that product is orange-yellow or orange
Quantizating index, be ability common knowledge, this can pass through visual chromogenic reaction detect formaldehyde.
Beneficial effects of the present invention: formaldehyde is detected using a kind of diazepine structure directing agent and the visual chromogenic reaction of formaldehyde
Concentration；For the present invention compared with the method for existing formaldehyde box technology detection formaldehyde, reaction condition is mild, is not required to strong acid or highly basic is urged
Change, does not need extemporaneous preparation test fluid, indicator itself is without obvious smell；A kind of diazepine structure directing agent of the present invention can be with
Applied to fields such as air detection, Safety of Food Quality monitoring, medical analysis and sensors.
Specific embodiment
The present invention is described in detail combined with specific embodiments below:
Embodiment 1
(1) it takes in the 100mL aqueous solution that content of formaldehyde is 1.0ppm；
(2) ethanol solution that indicator mass fraction 0.1% is is prepared；
(3) configured ethanol solution in step (2) is added such as into step (1)；Mixed solution body color is observed by nothing
Discoloration is orange-yellow.
Comparative experiments
(1) it takes in the 100mL aqueous solution that content of formaldehyde is 1.0ppm；
(2) ethanol solution is taken；
(3) ethanol solution in step (2) is instilled in the solution of step (1)；Mixed solution color is unchanged；Judge no first
Aldehyde exists.
Embodiment 2
(1) it takes in the 100mL aqueous solution that content of formaldehyde is 3.0ppm；
(2) acetone soln that indicator mass fraction 1% is is prepared；
(3) configured acetone soln in step (2) is added such as into step (1)；Mixed solution body color is observed by nothing
Discoloration be it is orange-yellow, mixed liquor color is deeper than mixed solution color in embodiment 1, judge concentration of formaldehyde be higher than embodiment 1.
Embodiment 3
(1) prepare the air detection cabin that content of formaldehyde is 1.0ppm；
(2) prepare the aluminium hydroxide for the indicator that mass fraction is 1%；
(3) gained in step (2) is put into the air detection cabin of step (1) with the aluminium hydroxide of indicator；It sees
Surveying aluminium hydroxide becomes orange-yellow from colourless.
Embodiment 4
(1) prepare the air detection cabin that content of formaldehyde is 5.0ppm；
(2) preparing indicator mass fraction is 2% silica；
(3) gained in step (2) is put into the air detection cabin of step (1) with the silica of indicator；It sees
Surveying silica becomes orange from colourless；Silica color is deeper than embodiment 1, in embodiment 2 and embodiment 3 mixed solution or
Carrier color judges that concentration of formaldehyde is higher than embodiment 1,2,3.
Embodiment 5
(1) it takes in the 100mL aqueous solution that content of formaldehyde is 1.0ppm；
(2) ethyl alcohol and ethyl acetate mixture that indicator mass fraction 10% is are prepared；
(3) the gained mixed solution in step (2) is added in step (1) sample；Observation mixed solution is become from colourless
It is orange-yellow；
Embodiment 6
(1) prepare the air detection cabin that content of formaldehyde is 2.0ppm；
(2) preparing indicator mass fraction is 10% silica gel and high territory hybrid solid carrier；
(3) silica gel by the gained in step (2) with indicator and high territory mixed carrier are put into the air of step (1)
It detects in cabin；Observing silica gel and high territory hybrid solid carrier becomes orange from colourless；
Embodiment 7
(1) it takes in the 100mL aqueous solution that content of formaldehyde is 3.0ppm；
(2) indicator is added in step (1) sample；Observing mixed liquor becomes orange from colourless；
Claims (8)
1. a kind of diazepine structure directing agent detects carbaldehyde Method, which is characterized in that by diazepine structure directing agent with
The concentration of the variation detection formaldehyde of formaldehyde reaction color, the structural formula of indicator are as follows:
2. a kind of diazepine structure directing agent detects carbaldehyde Method according to claim 1, which is characterized in that including as follows
Step:
(1) prepare test specimens to be checked；
(2) it disperses diazepine structure directing agent in carrier；
(3) gained in step (2) is placed in tested sample (1) or is contacted table with the carrier of diazepine structure directing agent
Face；Observing carrier or mixed solution color becomes orange-yellow to orange from colourless, orange-yellow to orange according to carrier or mixed solution
The shade degree of color, judges concentration of formaldehyde.
3. diazepine structure directing agent detects carbaldehyde Method according to claim 2, which is characterized in that according to diazepine
Structure directing agent reacts obtained product color change detection concentration of formaldehyde with formaldehyde, and the one-dimensional stretching, extension of product is linear
Polymer formulae:
4. diazepine structure directing agent detects carbaldehyde Method according to claim 3, which is characterized in that the generation quality testing
It is 400~580nm that it, which is surveyed, in the principal absorption wavelength of visible spectral range.
5. diazepine structure directing agent detects carbaldehyde Method according to claim 2, which is characterized in that the test to be checked
Concentration of formaldehyde is greater than 0.1ppm in sample.
6. a kind of Analysis Methods for Formaldehyde according to claim 2, which is characterized in that the carrier be water, ethyl alcohol, glycerol, paper,
One of kaolin, aluminium oxide, aluminium hydroxide, silica, silica gel, zeolite, molecular sieve, attapulgite, clay and carclazyte
Or several mixing.
7. diazepine structure directing agent detects carbaldehyde Method according to claim 2, which is characterized in that the indicator makes
The mass percent of used time and carrier is 0.01~100%.
8. a kind of application of diazepine structure directing agent detection formaldehyde as described in claim 1.
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Effective date of registration: 20220707 Address after: 110000 No. 2-12, 8a, No. 6 road, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee after: SHENYANG PHOTOSENSITIVE CHEMICAL RESEARCH INSTITUTE CO.,LTD. Address before: 110027 No.6 Road, No.6 street, phase II, Shenyang Economic and Technological Development Zone, Shenyang City, Liaoning Province Patentee before: LUCKY (SHENYANG) TECHNOLOGICAL INDUSTRIES CO.,LTD. |