CN106596534A - Method for detecting content of formaldehyde in sheet material - Google Patents
Method for detecting content of formaldehyde in sheet material Download PDFInfo
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- CN106596534A CN106596534A CN201611114517.9A CN201611114517A CN106596534A CN 106596534 A CN106596534 A CN 106596534A CN 201611114517 A CN201611114517 A CN 201611114517A CN 106596534 A CN106596534 A CN 106596534A
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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
- G01N21/17—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
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Abstract
The invention discloses a method for detecting the content of formaldehyde in a sheet material. The method comprises the following steps: S100, acquiring absorbance value information of an extraction solution of a to-be-detected sheet material sample; S200, acquiring absorbance value information of a reaction solution of the to-be-detected sheet material sample; S300, drawing a standard working curve of absorbance of a formaldehyde standard solution; S400, according to the absorbance value information of the extraction solution of the to-be-detected sheet material sample, the absorbance value information of the reaction solution of the to-be-detected sheet material sample and the slope of the standard working curve of the absorbance of the formaldehyde standard solution, acquiring formaldehyde content information of the to-be-detected sheet material sample. With the method, the specific content of formaldehyde in the sheet material can be determined at a time, and the influence from the using environment and the surface treatment process is avoided.
Description
Technical field
The present invention relates in toxic and harmful detection technique field, more particularly to a kind of sheet material content of formaldehyde detection side
Method.
Background technology
Formaldehyde is oleo stock poisonous substance, after people's suction high-concentration formaldehyde, it may appear that the serious stimulation of respiratory tract and edema, eye thorn
Bitterly, have a headache, bronchial asthma also can occur.Direct skin contact formaldehyde, can cause dermatitis, mottle, necrosis.Often suction is a small amount of for Jing
Formaldehyde, has the symptoms such as headache, weak, insomnia and autonomic nervous dysfunction.Chronic poisoning can be caused, mucosa hyperemia, skin occur
Stimulate the diseases such as disease, allergic dermatitises.Anemia of pregnant woman's suction for a long time may cause ewborn infant deformity, or even dead, and man inhales for a long time
Enter to cause sperm deformity, death, sexual disorder, serious caused reproductive performance to lack.Formaldehyde has become room air
Major pollutants, by World Health Organization (WHO) be defined as it is carcinogenic and cause deformed material.In all contactees, child and anemia of pregnant woman couple
Formaldehyde is particularly sensitive.
In building and ornament materials detection field, material formaldehyde examination is widely to screen very much indoor pollutant source side
Method.At present sheet material require to be determined with Extraction method according to standard GB/T 18580-2001, carries out result judgement.The party
Method is related to the volatile poisonous organic reagent such as toluene, and needs to control in rate of extraction, and extraction process testing staff not
Can leave, it is necessary to which monitor in real time extracts state, otherwise easily has various accidents.
At present formaldehyde determination has three kinds of methods in sheet material：One, with condensed steam water determine sheet material in burst size of methanal, secondary mistake
Journey at least needs 2 days, and the cycle is longer；Two, burst size of methanal in sheet material is determined with environmental test chamber method, the method cycle is special
Length, needs 5 days～28 days, and apparatus expensive, and energy consumption is larger；Three, Extraction method is used, the method need to use a large amount of organic examinations
Agent toluene is carried out as extractant under the conditions of continuous heating, and whole process is dangerous big, needs special messenger to keep an eye on, and the cycle needs
Take the time.Comprehensive three kinds of methods, are burst size of methanal in measure sheet material, but in practice formaldehyde is to be discharged into sky for a long time
Different according to scene temperature humidity in gas, plate surface disposition is different, and burst size of methanal has very big difference in sheet material.
And as long as the Form aldehyde release cycle was up to 20～30 years, content of formaldehyde is specifically how many in sheet materialWhether in our daily life rings
In the healthy limits in borderTherefore, explore a kind of both easy, and the method for safety, content of formaldehyde detection in sheet material can be made
It is widely popularized.
The content of the invention
It is an object of the invention to provide in a kind of sheet material content of formaldehyde detection method, be capable of achieving disposable to determine in sheet material
Formaldehyde concrete content, is not affected by use environment and plate surface handling process, improves work efficiency.
The technical scheme that the present invention is provided is as follows：
The detection method of content of formaldehyde in a kind of sheet material, including：Step S100 obtains the extract of sheet material to be measured sample
Absorbance information；Step S200 obtains the absorbance information of the reactant liquor of the sheet material to be measured sample；Step S300 is drawn
The standard working curve of the absorbance of formaldehyde standard solution；Absorbance information, institute of step S400 according to sheet material to be measured sample
State the absorbance information of sheet material to be measured example reaction liquid and the absorbance of formaldehyde standard solution standard working curve it is oblique
Rate obtains the content information of the formaldehyde of the sheet material to be measured sample.
In the present invention, can disposably determine formaldehyde concrete content in sheet material, not processed by use environment and plate surface
Technogenic influence, improves work efficiency.
Preferably, step S100 includes：The sheet material to be measured of pre-set dimension is ground to form diameter not by step S110
More than the sample powder of 0.16mm, milling time not less than 4min；Step S120 obtains the sheet material to be measured of preset weight
Sample powder, in being put into the ground conical flask of preset volume, and is put in water-bath constant temperature oscillator, makes the sheet material to be measured sample
The extract of product；Step S130 is contrasted according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the extraction of the sheet material to be measured sample
Take the absorbance information of liquid.
In the present invention, simple for the correlation computations of sheet material to be measured sample absorbance, convenient, sample making is simple, side
Just, manpower has been saved, while time-consuming short.
Preferably, step S200 includes：The extract of the sheet material to be measured sample is by step S210 by thickness
0.45um aqueouss microporous filter membrane is filtered；Step S220 obtains the extract 25mL of the sheet material to be measured sample after filtering and puts
In entering 100mL ground conical flasks, and add the standard acetylacetone,2,4-pentanedione solution of 25mL to carry out lucifuge cooling, make reactant liquor；
Step S230 is contrasted according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the absorbance of the reactant liquor of the sheet material to be measured sample
Information.
In the present invention, can be detected using acetylacetone,2,4-pentanedione solution innocuous agents, moreover it is possible to effectively improve detection people
Member's work efficiency, the sensitivity and accuracy when more optimizedly detecting is higher.
Preferably, also include：Make the standard acetylacetone,2,4-pentanedione solution：150g ammonium acetates are weighed in 800mL distilled water,
3mL acetic acid and 2mL acetylacetone,2,4-pentanediones are added, and is sufficiently stirred for, be settled to 1L, kept in dark place.
Preferably, the acquisition of the blank value of the standard acetylacetone,2,4-pentanedione solution includes：Test under 412nm wavelength, with
The absorbance measured after 25mL water and 25mL standard acetylacetone,2,4-pentanedione solution hybrid reactions is set to the standard acetylacetone,2,4-pentanedione solution
Blank value.
Preferably, step S300 also includes：Formaldehyde standard solution of step S310 by normal concentration for 100mg/L enters
20 times of dilutions of row, and as Standard Reserving Solution；The Standard Reserving Solution of step S320 acquisition different volumes is corresponding respectively to be put
In entering 100mL volumetric flasks, 100mL is settled to water, is fabricated to the formaldehyde standard solution of variable concentrations；Step S330 is from step
Obtain the formalin of 25mL variable concentrations after water constant volume in rapid S320 in corresponding volumetric flask respectively, and corresponding respectively put
In entering 100 milliliters of ground conical flasks, 25mL acetylacetone,2,4-pentanedione solution is then added in corresponding ground conical flask, carried out at reaction
Reason；Step S340 adjusts the blank value that the mixed solution after step S330 reaction treatment is set to the standard acetylacetone,2,4-pentanedione solution
Zero spectrophotometric absorbance；Step S350 distinguishes the formaldehyde of variable concentrations in determination step S320 according to step S340
The absorbance of standard solution；Step S350 is with the formaldehyde standard solution absorbance as vertical coordinate, and the formaldehyde standard is molten
Liquid hold-up is abscissa, draws the standard working curve of the absorbance of the formaldehyde standard solution.
Preferably, also include：The formaldehyde is obtained according to the standard working curve of the absorbance of the formaldehyde standard solution
The slope of the standard working curve of the absorbance of standard solution.
Preferably, also include：The content information model of the formaldehyde of the sheet material to be measured sample includes：
Ea-- the described absorbance of the sheet material to be measured sample；Eb-- the suction of the reactant liquor of the sheet material to be measured sample
Shading value；V0-- the sheet material to be measured population of samples product, is 100mL in the present invention；The absorbance of formaldehyde standard solution described in F--
Standard working curve slope；Sheet material to be measured sample quality described in W--, unit is g；The first of sheet material to be measured sample described in C--
The content of aldehyde.
Preferably, also include：The standard acetylacetone,2,4-pentanedione solution can be less than 3 days with the time limit.
In the present invention, can be detected using acetylacetone,2,4-pentanedione solution innocuous agents, moreover it is possible to effectively improve detection people
Member's work efficiency, the sensitivity and accuracy when more optimizedly detecting is higher.
By the detection method of content of formaldehyde in a kind of sheet material that the present invention is provided, following at least one can be brought beneficial
Effect：
Compared with prior art, the detection method of content of formaldehyde was both easy in sheet material, and the method for safety for the present invention, this
Content of formaldehyde detection in bright sheet material is widely popularized, and is had far-reaching significance.
The present invention compared with prior art, solves that test period is longer and apparatus expensive, and energy consumption is larger, process hazard
Big problem.
Description of the drawings
Below by clearly understandable mode, preferred implementation is described with reference to the drawings, to content of formaldehyde in a kind of sheet material
Detection method characteristic, technical characteristic, advantage and its implementation be further described.
Fig. 1 is the flow chart of detection method one embodiment of content of formaldehyde in a kind of sheet material of the invention；
Fig. 2 is the quasi- working curve diagram of another embodiment of the detection method of content of formaldehyde in a kind of sheet material of the invention.
Specific embodiment
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings, and obtains other embodiments.To make simplified form, in each figure only schematically
Part related to the present invention is indicated, they do not represent it as the practical structures of product.In addition, so that simplified form
Readily appreciate, the part with identical structure or function, only symbolically depicts one of those in some figures, or only marks
One of those is gone out.Herein, " one " is not only represented " only this ", it is also possible to represent the situation of " more than one ".
The present invention provides a kind of embodiment of the detection method of content of formaldehyde in sheet material, including：Step S100 obtains to be measured
The absorbance information of the extract of board samples；Step S200 obtains the absorbance of the reactant liquor of the sheet material to be measured sample
Information；Step S300 draws the standard working curve of the absorbance of formaldehyde standard solution；Step S400 is according to sheet material to be measured sample
Absorbance information, the absorbance information of the sheet material to be measured example reaction liquid and formaldehyde standard solution absorbance
Standard working curve slope obtain the sheet material to be measured sample formaldehyde content information.
Specifically, in the present embodiment, by being processed through Mechanical Crushing based on sheet material, using acetylacetone,2,4-pentanedione reagent and plate
A kind of compound of colour developing of formaldehyde reaction production contained in material is yellow complex, and the deeper explanation content of formaldehyde of color is more
Height, color and the absorbance direct proportionality (i.e. standard curve) of solution, therefore combine mark by determining the absorbance of solution
Directrix curve can obtain corresponding content of formaldehyde in solution, by determining the color-developing compounds to calculate sheet material in formaldehyde contain
Measure, its formula model is：The content information model of the formaldehyde of the sheet material to be measured sample includes：
Ea-- the described absorbance of the sheet material to be measured sample；Eb-- the suction of the reactant liquor of the sheet material to be measured sample
Shading value；V0-- the sheet material to be measured population of samples product, is 100mL in the present invention；The absorbance of formaldehyde standard solution described in F--
Standard working curve slope；Sheet material to be measured sample quality described in W--, unit is g；The first of sheet material to be measured sample described in C--
The content of aldehyde.
In the present invention, can disposably determine formaldehyde concrete content in sheet material, not processed by use environment and plate surface
Technogenic influence, improves work efficiency.
Preferably, step S100 includes：The sheet material to be measured of pre-set dimension is ground to form diameter not by step S110
More than the sample powder of 0.16mm, milling time not less than 4min；Step S120 obtains the sheet material to be measured of preset weight
Sample powder, in being put into the ground conical flask of preset volume, and is put in water-bath constant temperature oscillator, makes the sheet material to be measured sample
The extract of product；Step S130 is contrast according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the sheet material to be measured sample
The absorbance information of extract.
Specifically, the present embodiment is the another embodiment provided on the basis of above example；By sheet material evidence with a chainsaw
Into fritter, with meso sample according to the fritter into 1cm × 2cm sizes or so, it is put in sample pulverizer and clays into power, grinding time
More than 4min, make particle diameter be not more than 0.16mm, powder is stirred；Then take wherein 2g to stir sample, be put into
In 250mL ground conical flasks, 100mL water is added, after shaking up, in being put in water-bath constant temperature oscillator.Water-bath constant temperature oscillator is set
Water temperature is 40 DEG C, and frequency of oscillation is 100r/min, vibrates 60min.By Vacuum filtration device, by extract 0.45um aqueouss
Filtering with microporous membrane；Testing sample extract asks for absorbance E after filtering to ita.What blank value was obtained is included to test
Need to add distilled water, distilled water and acetylacetone,2,4-pentanedione also to produce a certain amount of absorbance in journey, be exactly blank absorbency i.e. sheet
Bottom, will deduct blank absorbency (background) to remove the interference of distilled water in calculating process.
In the present invention, simple for the correlation computations of sheet material to be measured sample absorbance, convenient, sample making is simple, side
Just, manpower has been saved, has been taken short.
Preferably, step S200 includes：The extract of the sheet material to be measured sample is by step S210 by thickness
0.45um aqueouss microporous filter membrane is filtered；Step S220 obtains the extract 25mL of the sheet material to be measured sample after filtering and puts
In entering 100mL ground conical flasks, and add the standard acetylacetone,2,4-pentanedione solution of 25mL to carry out lucifuge cooling, make reactant liquor；
Step S230 is contrast according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the extinction of the reactant liquor of the sheet material to be measured sample
Degree information.
Specifically, the present embodiment is the another embodiment provided on the basis of above example；Take what 2g had been prepared
Sample powder, in being put into 250mL ground conical flasks, adds 100mL water, after shaking up, in being put in water-bath constant temperature oscillator.Water is set
Bath constant temperature oscillator water temperature is 40 DEG C, and frequency of oscillation is 100r/min, 60min is vibrated, by Vacuum filtration device, by extract
With 0.45um aqueouss filtering with microporous membranes.Take filtrate 25mL to be put in 100mL ground conical flasks, be subsequently adding 25mL acetylacetone,2,4-pentanediones
Solution, in 65 DEG C of heating in water bath 10min, then lucifuge 60min is cooled down, and to the solution after its hybrid reaction its absorbance is asked for
Eb。
In the present invention, can be detected using acetylacetone,2,4-pentanedione solution innocuous agents, moreover it is possible to effectively improve detection people
Member's work efficiency, the sensitivity and accuracy when more optimizedly detecting is higher.
Preferably, also include：Make the standard acetylacetone,2,4-pentanedione solution：150g ammonium acetates are weighed in 800mL distilled water,
3mL acetic acid and 2mL acetylacetone,2,4-pentanediones are added, and is sufficiently stirred for, be settled to 1L, kept in dark place.The solution retention cycle is 3d, after 3d
Need to prepare again.
Preferably, the acquisition of the blank value of the standard acetylacetone,2,4-pentanedione solution includes：Test under 412nm wavelength, with
The absorbance measured after 25mL water and 25mL standard acetylacetone,2,4-pentanedione solution reactions is set to the sky of the standard acetylacetone,2,4-pentanedione solution
White value E0。
Preferably, step S300 also includes：Formaldehyde standard solution of step S310 by normal concentration for 100mg/L enters
20 times of dilutions of row, and as Standard Reserving Solution；The Standard Reserving Solution of step S320 acquisition different volumes is corresponding respectively to be put
In entering 100mL volumetric flasks, 100mL is settled to water, is fabricated to the formaldehyde standard solution of variable concentrations；Step S330 is from step
Obtain the formalin of 25mL variable concentrations after water constant volume in rapid S320 in corresponding volumetric flask respectively, and corresponding respectively put
In entering 100 milliliters of ground conical flasks, 25mL acetylacetone,2,4-pentanedione solution is then added in corresponding ground conical flask, carried out at reaction
Reason；Step S340 adjusts the blank value that the mixed solution after step S330 reaction treatment is set to the standard acetylacetone,2,4-pentanedione solution
Zero spectrophotometric absorbance；Step S350 distinguishes the formaldehyde of variable concentrations in determination step S320 according to step S340
The absorbance of standard solution；Step S350 is with the formaldehyde standard solution absorbance as vertical coordinate, and the formaldehyde standard is molten
Liquid hold-up is abscissa, draws the standard working curve of the absorbance of the formaldehyde standard solution.
Specifically, the present embodiment is the another embodiment provided on the basis of above example；The work of making standard is bent
Line solution series of icons is：(GB/T15481,104116) the standard liquid concentration is 100mg/L, dilutes 20 to open formaldehyde standard solution
After times, as Standard Reserving Solution.Stock solution 0,5,10,20,50,100mL is pipetted respectively uses water in different 100mL volumetric flasks
100mL is settled to, stand-by (concentration is respectively 0,0.25,0.5,1.0,2.5,5.0 μ g/ as standard working curve solution series
mL).Development step：Standard working curve solution series 25mL is taken respectively to be put in 100mL ground conical flasks, is subsequently adding 25mL
Acetylacetone,2,4-pentanedione solution, in 65 DEG C of heating in water bath 10min, then lucifuge 60min is cooled down.With 25mL water and 25mL under 412nm wavelength
Acetylacetone,2,4-pentanedione mixing is used as the spectrophotometric absorbance of blank value zeroing, difference metric works curve solution series extinction
Angle value (see the table below)
Standard working curve solution series of tables one:
With absorbance A as vertical coordinate, standard working curve solution content of formaldehyde (μ g/mL) is abscissa, draws standard work
Make curve；It is described in reference diagram 2；Coefficient R ＞ 0.9990；If in extract content of formaldehyde be above standard working curve determine model
Enclose, need to the amount of down-sampling (powder-like) test again.
Preferably, also include：The formaldehyde is obtained according to the standard working curve of the absorbance of the formaldehyde standard solution
The slope of the standard working curve of the absorbance of standard solution.
Specifically, the present embodiment is the another embodiment provided on the basis of above example；Standard working curve figure,
With reference to shown in Fig. 2,0.1351 F=0.1351 is set in the present embodiment according to calculating.
Sample detection result table two：
By the Analysis Methods for Formaldehyde in above example, to the testing result of formaldehyde in board samples as shown in Table 2,
Same sample is tested 2 times, and end product is averaged；This law validation verification, by mark-on first in whole experimental procedure is determined
Aldehyde.Therefore in the present invention, content of formaldehyde determines simple and convenient, nontoxic infringement in board samples, has saved manpower physics,
Effectively improve work efficiency.
The present embodiment be on the basis of above example provide another embodiment, in the present embodiment there is provided with regard to
The test of sheet material to be measured sample.This law validation verification, by mark-on content of formaldehyde in whole experimental procedure is determined；According to the above
Embodiment provides the basis of the method for testing of content of formaldehyde in sheet material, and determination of recovery rates is provided in the present embodiment；Respectively will
The extract of 10mL board samples is moved in 2 25mL volumetric flasks, and a volumetric flask adds appropriate formaldehyde standard solution, makes to add
Content of formaldehyde is almost equal with content of formaldehyde in sample in the standard solution for entering, by two volumetric flask distilled water dilutings to 25mL
Scale.Solution in volumetric flask is transferred to respectively in 100mL ground conical flasks, 25mL acetylacetone,2,4-pentanedione solution is separately added into, is mixed,
10min, then lucifuge cooling 60min are heated under 65 DEG C of water bath conditions.Determine under 412nm wavelength, with 25mL water+25mL acetyl
Acetone mixing is denoted as E as blank school zero spectrophotometer, the sample absorbance value that with the addition of formaldehyde standard solutionA, it is not added with
Formaldehyde standard solution absorbance is denoted as EP.The content of formaldehyde response rate in sample is calculated according to formula：
The RR-- content of formaldehyde response rate, (being accurate to 0.1%)；
EA-- with the addition of the absorbance of the extract of formaldehyde standard solution；
EP-- it is not added with the absorbance of the extract of formaldehyde standard solution；
EZU-- the absorbance (obtaining from standard curve) of addition formaldehyde standard solution.
Response rate data
In embodiment form more than, there is provided two kinds of extracts, a kind of high concentration (i.e. background absorbance is high) is a kind of low
Concentration (i.e. background absorbance is low), response rate data prove that the data of this experimental technique test are accurate, and the response rate more connects
The result of nearly 100% explanation test is more accurate.
The method response rate replication, obtains result in the range of 95%～105%, is as a result satisfied with.
In all embodiments of the invention, 22 DEG C of temperature in the lab, humidity 65%RH.
It should be noted that above-described embodiment can independent assortment as needed.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, in the premise without departing from the principle of the invention
Under, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. in a kind of sheet material content of formaldehyde detection method, it is characterised in that include：
Step S100 obtains the absorbance information of the extract of sheet material to be measured sample；
Step S200 obtains the absorbance information of the reactant liquor of the sheet material to be measured sample；
Step S300 draws the standard working curve of the absorbance of formaldehyde standard solution；
Step S400 is according to the absorbance information of the extract of sheet material to be measured sample, the reactant liquor of the sheet material to be measured sample
The slope information of the standard working curve of the absorbance of absorbance information and the formaldehyde standard solution, obtains described to be measured
The content information of the formaldehyde of board samples.
2. in sheet material according to claim 1 content of formaldehyde detection method, it is characterised in that the step S100 bag
Include：
The sheet material to be measured of pre-set dimension is ground to form diameter and is not more than 0.16mm, milling time not less than 4min by step S110
Sample powder；
Step S120 obtains the sample powder of the sheet material to be measured of preset weight, in being put into the ground conical flask of preset volume,
And be put in water-bath constant temperature oscillator, make the extract of the sheet material to be measured sample；
Step S130 is contrasted according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the institute of the extract of the sheet material to be measured sample
State absorbance information.
3. in sheet material according to claim 2 content of formaldehyde detection method, it is characterised in that the step S200 bag
Include：
Step S210 is filtered the extract of the sheet material to be measured sample for 0.45um aqueouss microporous filter membrane by thickness；
Step S220 obtains the extract 25mL of the sheet material to be measured sample after filtering and is put in 100mL ground conical flasks, and
Adding the standard acetylacetone,2,4-pentanedione solution of 25mL carries out lucifuge cooling, makes reactant liquor；
Step S230 is contrasted according to the blank value of standard acetylacetone,2,4-pentanedione solution, obtains the suction of the reactant liquor of the sheet material to be measured sample
Luminosity information.
4. in sheet material according to claim 3 content of formaldehyde detection method, it is characterised in that also include：
Make the standard acetylacetone,2,4-pentanedione solution：
150g ammonium acetates are weighed in 800mL distilled water, 3mL acetic acid and 2mL acetylacetone,2,4-pentanediones is added, and is sufficiently stirred for, be settled to
1L, keeps in dark place.
5. in sheet material according to claim 4 content of formaldehyde detection method, it is characterised in that the standard acetylacetone,2,4-pentanedione
The acquisition of the blank value of solution includes：
Test under 412nm wavelength, set with the absorbance measured after 25mL water and 25mL standard acetylacetone,2,4-pentanedione solution hybrid reactions
It is set to the blank value of the standard acetylacetone,2,4-pentanedione solution.
6. in sheet material according to claim 3 content of formaldehyde detection method, it is characterised in that step S300 is also wrapped
Include：
Normal concentration is carried out 20 times of dilutions by step S310 for the formaldehyde standard solution of 100mg/L, and as Standard Reserving Solution；
The Standard Reserving Solution of step S320 acquisition different volumes is corresponding respectively to be put in 100mL volumetric flasks, uses water constant volume
To 100mL, the formaldehyde standard solution of variable concentrations is fabricated to；
It is molten with the formaldehyde of variable concentrations after water constant volume that step S330 distinguishes acquisition 25mL in corresponding volumetric flask from step S320
Liquid, and it is corresponding respectively be put in 100 milliliters of ground conical flasks, then in corresponding ground conical flask add 25mL levulinics
Ketone solution, carries out reaction treatment；
Mixed solution after step S330 reaction treatment is set to step S340 the blank value of the standard acetylacetone,2,4-pentanedione solution
Return to zero spectrophotometric absorbance；
Step S350 distinguishes the absorbance of the formaldehyde standard solution of variable concentrations in determination step S320 according to step S340
Value；
With the formaldehyde standard solution absorbance as vertical coordinate, the formaldehyde standard solution content is abscissa to step S350,
Draw the standard working curve of the absorbance of the formaldehyde standard solution.
7. in sheet material according to claim 6 content of formaldehyde detection method, it is characterised in that also include：
The absorbance of the formaldehyde standard solution is obtained according to the standard working curve of the absorbance of the formaldehyde standard solution
The slope of standard working curve.
8. in sheet material according to claim 7 content of formaldehyde detection method, it is characterised in that also include：
The content information model of the formaldehyde of the sheet material to be measured sample includes：
Ea-- the described absorbance of the sheet material to be measured sample；
Eb-- the absorbance of the reactant liquor of the sheet material to be measured sample；
V0-- the sheet material to be measured population of samples product, is 100mL in the present invention；
The slope of the standard working curve of the absorbance of formaldehyde standard solution described in F--；
Sheet material to be measured sample quality described in W--, unit is g；
The content of the formaldehyde of sheet material to be measured sample described in C--.
9. according to the detection method of content of formaldehyde in the arbitrary described sheet material of claim 3-6, it is characterised in that also include：
The standard acetylacetone,2,4-pentanedione solution can be less than 3 days with the time limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114517.9A CN106596534A (en) | 2016-12-07 | 2016-12-07 | Method for detecting content of formaldehyde in sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114517.9A CN106596534A (en) | 2016-12-07 | 2016-12-07 | Method for detecting content of formaldehyde in sheet material |
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| CN107505314A (en) * | 2017-08-14 | 2017-12-22 | 山东南山铝业股份有限公司 | A kind of assay method of aluminium alloy cover coating material free formaldehyde |
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| CN110687061A (en) * | 2019-11-05 | 2020-01-14 | 重庆大学 | Formaldehyde solution detection method based on spectrometer |
| CN114487186A (en) * | 2022-01-24 | 2022-05-13 | 浙江意诚检测有限公司 | Formaldehyde detection equipment and detection method for indoor decoration plate |
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| CN110687061A (en) * | 2019-11-05 | 2020-01-14 | 重庆大学 | Formaldehyde solution detection method based on spectrometer |
| CN114487186A (en) * | 2022-01-24 | 2022-05-13 | 浙江意诚检测有限公司 | Formaldehyde detection equipment and detection method for indoor decoration plate |
| CN114487186B (en) * | 2022-01-24 | 2023-07-18 | 浙江意诚检测有限公司 | Formaldehyde detection equipment and detection method for interior decoration plate |
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