CN107421899A - Determine the detection method of water quality aniline, formaldehyde simultaneously based on ultraviolet-visible absorption spectroscopy - Google Patents
Determine the detection method of water quality aniline, formaldehyde simultaneously based on ultraviolet-visible absorption spectroscopy Download PDFInfo
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- CN107421899A CN107421899A CN201710508252.9A CN201710508252A CN107421899A CN 107421899 A CN107421899 A CN 107421899A CN 201710508252 A CN201710508252 A CN 201710508252A CN 107421899 A CN107421899 A CN 107421899A
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- 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
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Abstract
The invention discloses a kind of detection method for determining water quality aniline, formaldehyde simultaneously based on ultraviolet-visible absorption spectroscopy, it is related to water quality index detection field, mainly by preparing standard solution and mixed standard solution, draw ultraviolet-visible absorption spectroscopy figure determine optimal absorption wavelength, calculate absorptivity at optimal absorption wavelength, calculate in testing sample four aniline, concentration of formaldehyde steps form, to realize the function of determining aniline, formaldehyde simultaneously.
Description
Technical field
It is main the present invention relates to a kind of detection method for determining water quality aniline, formaldehyde simultaneously based on uv-visible absorption spectra
It is related to water quality index detection field.
Background technology
The detection of aniline, formaldehyde in water quality, usually entered respectively using ultraviolet-visible spectrophotometer according to disparity items
Row detection, respectively refer to following standard：
GB/T 11889-1989《Measure N- (1- naphthyls) ethylenediamine azo spectrophotometric of water quality amino benzenes compounds
Method》；
HJ 601-2011《The measure acetylacetone,2,4-pentanedione AAS of water quality formaldehyde》.
Laboratory is usually to carry out separate detection according to disparity items, but in daily monitoring task, generally requires to examine
Two or more projects are surveyed, if still detection not only reduces the efficiency of detection respectively, also add the operation of enterprise
Cost.
The content of the invention
For above the deficiencies in the prior art, the present invention proposes that a kind of uv-visible absorption spectra that is based on determines water simultaneously
The detection method of matter aniline, formaldehyde, detecting step can be simplified and improve efficiency.
To reach above-mentioned purpose, the technical scheme is that：Determination step is as follows：
(1) preparing standard solution and mixed standard solution：There are card aniline, formaldehyde standard liquid to carry out using authorized by state
Dilution, is configured to 25mg/L standard liquids, distilled water is solvent；
(2) draw ultraviolet-visible absorption spectroscopy figure and determine optimal absorption wavelength：Each 10ml of 25mg/L standard liquids is drawn in 2
In individual hard glass test tube, while 10ml distilled water is drawn in 1 hard glass test tube, utilize UV, visible light vis spectroscopy light
Degree meter is scanned between wavelength 340-610nm, and every 10nm measurements once, it is abscissa to draw wavelength according to test result
Absorbance is the uv-visible absorption spectra curve map of ordinate, is determined most according to ultraviolet-visible absorption spectroscopy curve map crest
Good absorbing wavelength；
(3) aniline, the formaldehyde standard liquid of a series of various concentrations are prepared.There is card standard liquid using authorized by state,
Dilution obtains formaldehyde, aniline standard solution, takes the formaldehyde of different volumes, aniline standard solution to add distilled water diluting extremely respectively
Graduation mark obtains a series of formaldehyde of various concentrations, aniline standard liquid, by formaldehyde, aniline series standard solution respectively at it
Absorbance is measured at optimal absorption wavelength, standard curve is drawn according to content and absorbance, most preferably inhaled according to standard curve
Receive the absorptivity at wavelength；
(4) aniline, concentration of formaldehyde in testing sample are calculated：
Calculated according to the following formula, can obtain the concentration value of component to be measured in mixed solution：
AFormaldehyde=εFormaldehydeCFormaldehyde
AAniline=εAnilineCAniline
In formula：AFormaldehyde、AAnilineFor formaldehyde, aniline mixed liquor optimal absorption wavelength absorbance；
εFormaldehyde、εAnilineIt is two kinds of substance formaldehydes, aniline respectively in the integral absorptivity of optimal absorption wavelength
L/(mg.cm)；
CFormaldehyde、CAnilineFor the mass concentration of two kinds of substance formaldehydes, aniline in mixing liquid, mg/L.
The present invention technical principle and have the beneficial effect that：This experiment is that one kind is based on uv-visible absorption spectra simultaneously
Water quality aniline, the detection method of formaldehyde are determined, mainly by preparing standard solution and mixed standard solution, drafting ultravioletvisible absorption
Spectrogram determine optimal absorption wavelength, calculate absorptivity at optimal absorption wavelength, calculate in testing sample aniline, formaldehyde it is dense
Four steps are spent, the material such as formaldehyde, aniline in water quality can be detected with detection method method, while detection scheme
It is simple to operation, detection efficiency is significantly improved, reduces operation cost.
Further, if two kinds of material a (formaldehyde), b (aniline) are in respective optimal absorption wavelength X in mixed liquor
A, influenced each other at λ b larger, using materials absorbed light degree additive property, solve simultaneous equations：
Aλa=εaλaCa+εbλaCb
Aλb=εaλbCa+εbλbCb
In formula：Aλa、AλbFor absorbance of the two kinds of mixed liquors of a, b under λ a, λ b；
εaλa、εbλaThe integral absorptivity L/ (mg.cm) for being two kinds of materials a, b under wavelength X a；
εaλb、εbλbThe integral absorptivity L/ (mg.cm) for being two kinds of materials a, b under wavelength X b；
Ca、CbFor the mass concentration of two kinds of materials a, b in mixing liquid, mg/L；
Solution obtains the concentration value C of material a, b in mixed liquora、Cb,
Further, if two kinds of material a (formaldehyde), b (aniline) are mutual at respective optimal absorption wavelength X a, λ b in mixed liquor
Have a great influence, add soda acid in the solution, change solution pH value so that the absorption peak position of each material and absworption peak quantity occur
Different degrees of change, influencing each other between each material can be reduced.Further, adjusted in measure first step advance line blank
Zero, place the blank sample of aniline and formaldehyde respectively inside two necks, be added to another material with one of which material
Returned to zero, influenced each other to reduce.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention wherein
Two width, for those of ordinary skill in the art, without having to pay creative labor, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is the aniline of the embodiment of the present invention, formaldehyde UV-visible absorption spectrum；
Fig. 2 is aniline, the formaldehyde canonical plotting of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the present invention is clearly and completely described, it is clear that described
Embodiment is only presently preferred embodiments of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Embodiment
This experiment be it is a kind of based on uv-visible absorption spectra while determine the detection method of water quality aniline, formaldehyde, mainly
Optimal absorption wavelength is determined by preparing standard solution and mixed standard solution, drafting ultraviolet-visible absorption spectroscopy figure, calculated most preferably
Absorptivity at absorbing wavelength, four aniline, concentration of formaldehyde steps compositions in testing sample are calculated to obtain, enter line blank before the assay
Zeroing, places the blank sample of aniline and formaldehyde, is added to another thing with one of which material respectively inside two necks
Matter is returned to zero, and is influenced each other to reduce.Specific implementation step is as follows：
(1) preparing standard solution and mixed standard solution：There are card aniline, formaldehyde standard liquid to carry out using authorized by state
Dilution, is configured to 25mg/L standard liquids, distilled water is solvent.
(2) draw ultraviolet-visible absorption spectroscopy figure and determine optimal absorption wavelength：Each 10ml of 25mg/L standard liquids is drawn in 2
In individual hard glass test tube, while 10ml distilled water is drawn in 1 hard glass test tube, utilize UV, visible light vis spectroscopy light
Degree meter is scanned between wavelength 340-610nm, and every 10nm measurements once, test result see the table below：
340-610nm absorbance test results
As shown in figure 1, aniline, formaldehyde UV-visible absorption spectrum are drawn according to test result.
By Fig. 1 aniline, formaldehyde UV-visible absorption spectrum, it is respectively formaldehyde 410nm, benzene to obtain optimal absorption wavelength
Amine 550nm, and as can be seen from the figure using aniline (formaldehyde) optimal absorption wavelength determine when, another substance formaldehyde (benzene
Amine) absorbance very little even without expression signal, then can directly using the material absorbance and integral absorptivity determine
The material concentration；
If two kinds of materials a, b influence each other larger at respective optimal absorption wavelength X a, λ b in mixed liquor, using material
Absorbance additive property, solve simultaneous equations：
Aλa=εaλaCa+εbλaCb
Aλb=εaλbCa+εbλbCb
In formula：Aλa、AλbFor absorbance of the two kinds of mixed liquors of a, b under λ a, λ b；
εaλa、εbλaThe integral absorptivity L/ (mg.cm) for being two kinds of materials a, b under wavelength X a；
εaλb、εbλbThe integral absorptivity L/ (mg.cm) for being two kinds of materials a, b under wavelength X b；
Ca、CbFor the mass concentration of two kinds of materials a, b in mixing liquid, mg/L；
Solution obtains the concentration value C of material a, b in mixed liquora、Cb。
It can also be used and add soda acid in the solution, change solution pH value so that the absorption peak position of each material and absworption peak
Different degrees of change occurs for quantity, reduces influencing each other between each material.
If there are three kinds or more than three kinds materials in mixed liquor, by above-mentioned principle by that analogy.
(3) absorptivity at optimal absorption wavelength is calculated
Prepare formaldehyde, the aniline standard liquid of a series of various concentrations.There are card standard liquid, dilution using authorized by state
Obtain 10ug/ml formaldehyde, 10ug/ml aniline standard solution, pipette respectively 0.0ml, 0.5ml, 1.0ml, 3.0ml,
5.0ml, 8.0ml standard solution add distilled water diluting to graduation mark in 6 25ml colorimetric cylinders, obtain content for 0ug,
5ug, 10ug, 30ug, 50ug, 80ug series standard solution, test result see the table below：
The standard series absorbance test result of table 4
As shown in Figure 2：The series standard solution of formaldehyde, aniline is drawn into aniline, first at wavelength 410nm, 550nm respectively
Aldehyde canonical plotting.
Formaldehyde：Y=0.0087x+0.0011 R2=0.9998
Aniline：Y=0.0174x+0.0035 R2=0.9991
It can equally be drawn by table 4 when being determined using aniline (formaldehyde) optimal absorption wavelength, another substance formaldehyde (benzene
Amine) absorbance very little, or even without expression signal；By Fig. 2 formaldehyde：Y=0.0087x+0.0011, aniline：Y=0.0174x+
0.0035, show that absorbance is respectively ε at formaldehyde 410nm, aniline 550nmFormaldehyde 410nm=0.0087, εAniline 550nm=0.0174.
(4) aniline, concentration of formaldehyde in testing sample are calculated
The integral absorptivity obtained by the absorbance under mixed solution different wave length and respective substance standard curve, under
Formula is calculated, and can obtain the concentration value of component to be measured in mixed solution.
Aλ410=εFormaldehyde λ 410CFormaldehyde
Aλ550=εAniline λ 550CAniline
In formula：Aλ410、Aλ550For the absorbance of formaldehyde, aniline mixed liquor under λ 410, λ 550；
εFormaldehyde λ 410、εAniline λ 550For two kinds of substance formaldehydes, aniline integral absorptivity L/ under λ 410, λ 550 respectively
(mg.cm)；
CFormaldehyde、CAnilineFor the mass concentration of two kinds of substance formaldehydes, aniline in mixing liquid, mg/L.
The shortcomings that instant invention overcomes being detected respectively during poisonous and harmful compound test of the prior art, there is provided a kind of
The detection method of the unified monitoring of two or more poisonous and harmful substance of water quality.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (4)
1. determine the detection method of water quality aniline, formaldehyde simultaneously based on uv-visible absorption spectra, it is characterised in that measure step
It is rapid as follows：
（1）Preparing standard solution and mixed standard solution：There are card aniline, the progress of formaldehyde standard liquid dilute using authorized by state
Release, be configured to 25mg/L standard liquids, distilled water is solvent；
（2）Draw ultraviolet-visible absorption spectroscopy figure and determine optimal absorption wavelength：It is hard in 2 to draw each 10ml of 25mg/L standard liquids
In matter teat glass, while 10ml distilled water is drawn in 1 hard glass test tube, utilize UV, visible light visible spectrophotometer
It is scanned between wavelength 340-610nm, every 10nm measurements once, it is abscissa extinction to draw wavelength according to test result
The uv-visible absorption spectra curve map for ordinate is spent, optimal inhale is determined according to ultraviolet-visible absorption spectroscopy curve map crest
Receive wavelength；
（3）Aniline, the formaldehyde standard liquid of a series of various concentrations are prepared, has card standard liquid, dilution using authorized by state
Formaldehyde, aniline standard solution are obtained, takes the formaldehyde of different volumes, aniline standard solution to add distilled water diluting to scale respectively
Line obtains a series of formaldehyde of various concentrations, aniline standard liquid, and the series standard solution of formaldehyde, aniline is optimal at its respectively
Absorbance is measured at absorbing wavelength, standard curve is drawn according to content and absorbance, optimal absorption ripple is obtained according to standard curve
The absorptivity of strong point；
（4）Calculate aniline, concentration of formaldehyde in testing sample：
Calculated according to the following formula, can obtain the concentration value of component to be measured in mixed solution：
A formaldehyde=ε formaldehyde C formaldehyde
A aniline=ε aniline C aniline
In formula：A formaldehyde, A aniline be formaldehyde, aniline mixed liquor optimal absorption wavelength absorbance；
ε formaldehyde, ε aniline are two kinds of substance formaldehydes, aniline respectively in the integral absorptivity L/ (mg.cm) of optimal absorption wavelength；
C formaldehyde, C aniline are the mass concentration of two kinds of substance formaldehydes, aniline in mixing liquid, mg/L.
2. the detection side according to claim 1 for determining water quality aniline, formaldehyde simultaneously based on uv-visible absorption spectra
Method, it is characterised in that：If two kinds of material a in mixed liquor（Formaldehyde）、b（Aniline）At respective optimal absorption wavelength X a, λ b mutually
Have a great influence, using materials absorbed light degree additive property, solve simultaneous equations：
Aλa=εaλaCa+εbλaCb
Aλb=εaλbCa+εbλbCb
In formula：A λ a, A λ b are absorbance of the two kinds of mixed liquors of a, b under λ a, λ b；
ε a λ a, ε b λ a are the integral absorptivity L/ (mg.cm) of two kinds of materials a, b under wavelength X a；
ε a λ b, ε b λ b are the integral absorptivity L/ (mg.cm) of two kinds of materials a, b under wavelength X b；
Ca, Cb are the mass concentration of two kinds of materials a, b in mixing liquid, mg/L；
Solution obtains concentration value Ca, Cb of material a, b in mixed liquor.
3. the detection side according to claim 1 for determining water quality aniline, formaldehyde simultaneously based on uv-visible absorption spectra
Method, it is characterised in that：If two kinds of material a in mixed liquor（Formaldehyde）、b（Aniline）At respective optimal absorption wavelength X a, λ b mutually
Have a great influence, add soda acid in the solution, change solution pH value so that the absorption peak position of each material and absworption peak quantity occur
Different degrees of change.
4. the detection side according to claim 1 for determining water quality aniline, formaldehyde simultaneously based on uv-visible absorption spectra
Method, it is characterised in that：Returned to zero in measure first step advance line blank, place the sky of aniline and formaldehyde respectively inside two necks
White sample, it is added to another material with one of which material and is returned to zero.
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Cited By (11)
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| CN108344703A (en) * | 2018-02-01 | 2018-07-31 | 寿光市环境保护局 | The method of amino benzenes compounds in spectrophotometry water quality |
| CN108535203A (en) * | 2018-04-03 | 2018-09-14 | 金川集团股份有限公司 | The derivative spectrophotometric detecting method of saccharin sodium in a kind of pure Ni solution |
| CN108872115A (en) * | 2018-07-30 | 2018-11-23 | 宁波工程学院 | UV derivative spectrum quantitative analysis method of the mountain flour to polycarboxylate water-reducer adsorbance |
| CN108896504A (en) * | 2018-06-12 | 2018-11-27 | 昆明理工大学 | Method that is a kind of while measuring p-nitrophenol and its catabolite nitrate radical content |
| CN109374540A (en) * | 2018-09-27 | 2019-02-22 | 阜阳师范学院 | A method of measuring the content of chromium in solution (VI) and manganese (VII) simultaneously |
| CN110687061A (en) * | 2019-11-05 | 2020-01-14 | 重庆大学 | Formaldehyde solution detection method based on spectrometer |
| CN111948167A (en) * | 2020-08-18 | 2020-11-17 | 天津大学 | Method for quickly quantifying concentration of polystyrene microspheres and tetracycline in water |
| CN113933323A (en) * | 2021-10-15 | 2022-01-14 | 武汉联影生命科学仪器有限公司 | Method for obtaining and applying K-edge identification capability parameter table |
| CN114112953A (en) * | 2021-11-19 | 2022-03-01 | 厦门大学 | Wet chemical micro in-situ sensor based on photometric detection and determination method thereof |
| CN114835241A (en) * | 2022-03-16 | 2022-08-02 | 青岛理工大学 | Real-time monitoring and intelligent ozone adding control method for refractory organic matters in sewage |
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| CN108344703A (en) * | 2018-02-01 | 2018-07-31 | 寿光市环境保护局 | The method of amino benzenes compounds in spectrophotometry water quality |
| CN108535203A (en) * | 2018-04-03 | 2018-09-14 | 金川集团股份有限公司 | The derivative spectrophotometric detecting method of saccharin sodium in a kind of pure Ni solution |
| CN108896504A (en) * | 2018-06-12 | 2018-11-27 | 昆明理工大学 | Method that is a kind of while measuring p-nitrophenol and its catabolite nitrate radical content |
| CN108896504B (en) * | 2018-06-12 | 2020-01-10 | 昆明理工大学 | Method for simultaneously determining nitrate content of p-nitrophenol and degradation product thereof |
| CN108872115A (en) * | 2018-07-30 | 2018-11-23 | 宁波工程学院 | UV derivative spectrum quantitative analysis method of the mountain flour to polycarboxylate water-reducer adsorbance |
| CN109374540A (en) * | 2018-09-27 | 2019-02-22 | 阜阳师范学院 | A method of measuring the content of chromium in solution (VI) and manganese (VII) simultaneously |
| CN110687061A (en) * | 2019-11-05 | 2020-01-14 | 重庆大学 | Formaldehyde solution detection method based on spectrometer |
| CN111948167A (en) * | 2020-08-18 | 2020-11-17 | 天津大学 | Method for quickly quantifying concentration of polystyrene microspheres and tetracycline in water |
| CN113933323A (en) * | 2021-10-15 | 2022-01-14 | 武汉联影生命科学仪器有限公司 | Method for obtaining and applying K-edge identification capability parameter table |
| CN114112953A (en) * | 2021-11-19 | 2022-03-01 | 厦门大学 | Wet chemical micro in-situ sensor based on photometric detection and determination method thereof |
| CN114112953B (en) * | 2021-11-19 | 2023-08-22 | 厦门大学 | Wet chemical micro in-situ sensor based on photometric detection and measuring method thereof |
| CN114835241A (en) * | 2022-03-16 | 2022-08-02 | 青岛理工大学 | Real-time monitoring and intelligent ozone adding control method for refractory organic matters in sewage |
| CN114835241B (en) * | 2022-03-16 | 2023-09-05 | 青岛理工大学 | Real-time monitoring and ozone intelligent adding control method for refractory organic matters in sewage |
| CN115266627A (en) * | 2022-08-29 | 2022-11-01 | 天津大学 | Ultraviolet detection method for rapidly measuring mixed micro-plastic and lead |
| CN115266627B (en) * | 2022-08-29 | 2023-03-10 | 天津大学 | Ultraviolet detection method for rapidly measuring mixed micro-plastic and lead |
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Application publication date: 20171201 |