CN106644980A - Method for detecting oil content in sewage - Google Patents
Method for detecting oil content in sewage Download PDFInfo
- Publication number
- CN106644980A CN106644980A CN201611149121.8A CN201611149121A CN106644980A CN 106644980 A CN106644980 A CN 106644980A CN 201611149121 A CN201611149121 A CN 201611149121A CN 106644980 A CN106644980 A CN 106644980A
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- Prior art keywords
- water sample
- absorbance
- water
- ultraviolet
- sewage
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000010865 sewage Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 238000002835 absorbance Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000000870 ultraviolet spectroscopy Methods 0.000 claims abstract description 10
- 238000012417 linear regression Methods 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000010790 dilution Methods 0.000 claims description 14
- 239000012895 dilution Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 14
- 238000002798 spectrophotometry method Methods 0.000 claims description 12
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 8
- 238000000605 extraction Methods 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005375 photometry Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
Abstract
The invention discloses an oil content detection method which comprises the following steps: (1) measuring the absorbance of a first water sample under the irradiation of light rays different in wavelength by use of an ultraviolet-visible spectrophotometer, and determining wavelength lambda as absorption wave; (2) fetching n second water samples, and measuring the oil content of each second water sample diluted to different concentration; (3) directly measuring the absorbance of n second water samples by use of the light ray absorbing wavelength lambda; (4) setting an equation y=k*A+alpha, and inputting the oil content of each second water sample and corresponding absorbance obtained in the step (3) into a computer for linear regression calculation to obtain the values of k and alpha; and (5) measuring the absorbance of a third water sample by use of an ultraviolet-visible spectrophotometer and substituting the value of absorbance into the equation obtained in the step (4) to obtain the oil content y of the third water sample. The invention aims at providing a method for detecting oil content in sewage, which is environment-friendly and harmless and simpler and more convenient to operate.
Description
Technical field
The present invention relates to sewage treatment area, specially a kind of method of detection Oil in Sewage Water content.
Background technology
For in production process produce sewage enterprise for, the process of sewage is an important job, for example for
For the enterprise of petroleum refining, the oil content in water is the main target for showing water quality, is needed in many production stage intermediate frequencies
The oil content in sewage is detected numerously.At present the method for the oil content in detection sewage mainly has two kinds.One kind is to perform earliest
Standard GB/T/T7490-1987 specified in, using petroleum ether extraction oil, then contained with determined by ultraviolet spectrophotometry oil
Amount.Another kind is specified in standard HJ637-2012, using carbon tetrachloride extraction oil, Wastewater Sample to be transferred completely into
In 2000mL separatory funnels, 25.0mL carbon tetrachloride washing sample bottles are measured, in being transferred completely into separatory funnel.Concussion 3min,
And the normally open cock exhausts of Jing, after static layering, other process are done, then use Infrared Spectralcolorimetry Detect Oil content.
Both the above method is directed to be extracted using solution, is then detected, its operating procedure is more numerous and diverse.Together
When, the carbon tetrachloride used in later approach is poisonous and the volatile nerve to people has paralysis to act on.Especially in summer temperature
Higher, carbon tetrachloride is more volatile, for the experimenter for frequently being detected, the injury to body can be caused really, separately
Outward, the discharge of raffinate will also result in pollution to environment after test.
The content of the invention
Present invention solves the technical problem that being to provide a kind of environmentally friendly and operate easier detection Oil in Sewage Water to contain
The method of amount.
The method of the detection Oil in Sewage Water content that the present invention is provided, comprises the steps：
(1) with distilled water as blank, shone using light of the water sample of ultraviolet-visible photometer measurement first in different wave length
Absorbance under penetrating, and wherein absorbance highest wavelength X is found out, and using the wavelength X as absorption ripple；
(2) take the water sample of n parts second, different degrees of dilution carried out to the water sample of n parts second, using ultraviolet spectrophotometry or
Person's infrared spectrophotometer measures per part of oil content y1......yn for being diluted as the second water sample of variable concentrations；
(3) using ultraviolet-uisible spectrophotometer with the absorbance of light direct measurement n second water sample of part of absorbing wavelength λ
A1......An；
(4) arrange equation y it is straight=k × A+ α, wherein y is directly the sewage oil obtained by direct ultraviolet AAS
Content, A is the absorbance of the second water sample measured by ultraviolet-visible spectrophotometry measurement, and k is the slope of straight line, and α is intercept,
Absorbance A 1......An by the oil content y1......yn of per part of second water sample obtained in step (3) and corresponding thereto
Input computer carries out linear regression calculating, the value of k and α is obtained, so as to obtain the equation of direct ultraviolet spectrophotometry de termination
Formula；
(5) with the absorbance of the water sample of measurement of ultraviolet-visible spectrophotometer the 3rd, and the value of absorbance is substituted into into step (4)
The equation of middle acquisition can obtain the oil content y of the 3rd water sampleDirectly。
The method of the detection Oil in Sewage Water content of the present invention has the advantages that：After equation is determined, as long as
Directly measure the absorbance of water sample and the oil content of water sample is obtained by calculating, this method can be referred to as direct ultraviolet light splitting light
Degree method first extracts in prior art and then measures the ultraviolet spectrophotometry of oil content and compares with infrared spectrophotometer, no
The step of only eliminating extraction causes operation easier, and will not produce danger to human body using chemical reagent due to extraction
Evil, also will not be to environment.
Description of the drawings
The step of Fig. 1 is the method for the detection Oil in Sewage Water content of one embodiment of the invention rough schematic view.
The step of Fig. 2 is the method according to the detection Oil in Sewage Water content of one embodiment of the invention
(1) data for obtaining are drawn absorbance A and the graph of relation of wavelength X.
Specific embodiment
As shown in figure 1, the method for the detection Oil in Sewage Water content of invention, it is not necessary to the oil in sewage is extracted, is wrapped
Include following steps：
(1) with distilled water as blank, using ultraviolet-uisible spectrophotometer light of first water sample in different wave length is obtained
Absorbance under irradiation, and wherein absorbance highest wavelength X is found out, and using the wavelength X as absorption ripple.
In the present embodiment, using TU-1810 measurement of ultraviolet-visible spectrophotometer absorbances, and by absorbance A and ripple
Long λ mappings, obtain Fig. 2.As can be drawn from Figure 2, water sample to wavelength for 200nm light trap highest, therefore, select
200nm is absorbing wavelength.
(2) water sample of n parts second is taken, and different degrees of dilution is carried out to the water sample of n parts second, and the n parts are diluted as
Second water sample of variable concentrations carries out ultraviolet spectrophotometry or infrared spectrophotometer measures its oil content y1......yn。
In the present embodiment, 5 part of second water sample is have chosen, the 1st part of the second water sample is raw water sample, that is, be not diluted.2nd part of the second water
Sample carries out 75% dilution, and the 3rd part of the second water sample carries out 50% dilution, and the 4th part of the second water sample carries out 25% dilution, the 5th part second
Water sample carries out 12.5% dilution.
(3) using ultraviolet-uisible spectrophotometer with the absorbance of light direct measurement n second water sample of part of absorbing wavelength λ
A1......An.In the present embodiment, the light with wavelength as 200nm irradiates 5 part of second water sample, the absorbance such as form 1 of acquisition
It is shown：
Form 1：
(4) equation y is setDirectly=k × A+ α, wherein yDirectlyFor the sewage oil content that direct ultraviolet AAS is obtained, A
The absorbance of the second water sample obtained for ultraviolet-uisible spectrophotometer, k is the slope of straight line, and α is intercept.By in step (3)
The oil content y of per part of second water sample for obtaining1......ynAnd absorbance A corresponding thereto1......AnInput computer enters
Row linear regression is calculated, and the value of k and α is obtained, so as to obtain the equation of direct ultraviolet spectrophotometry de termination.
In the present embodiment, the data input computer in form 1 is carried out into linear regression calculating, obtains k=5.51, α
=-0.2, therefore, can show that the equation for calculating sewage oil content according to absorbance is yDirectly=5.51 × A-0.2.Meanwhile, may be used also
Correlation coefficient r=0.9999 of party's formula is calculated, its value is closer to 1, and the linear correlation property of party's formula is better.
In practical operation, it is desirable to r >=0.997, if the value of r is not in this range, need to re-start step (1) to (4), until r
The satisfactory scope of value.
(5) with the absorbance of the water sample of measurement of ultraviolet-visible spectrophotometer the 3rd, and the value of absorbance is substituted into into step (4)
The equation of middle acquisition can obtain the oil content y of the 3rd water sampleDirectly。
So after equation is determined, as long as the oil directly measured the absorbance of water sample and water sample is obtained by calculating contains
Amount, this method can be referred to as direct ultraviolet AAS, with prior art in first extract and then measure the ultraviolet of oil content
AAS is compared with infrared spectrophotometer, causes the step of the method for the present invention not only eliminates extraction operation simpler
Just, and will not due to extraction using chemical reagent and to human body produce harm, also will not be to environment.
As preferred scheme, five part of second water sample is chosen in step (2), wherein, water sample 1 is raw water sample, and water sample 2 is
75% dilution raw water sample, water sample 3 is 50% dilution raw water sample, and water sample 4 is 25% dilution raw water sample, and water sample 5 is that 15% dilution is former
Water sample.
As preferred scheme, the method for the present invention can be verified by following steps whether reliably, specially：Root
Measure the oil content of m water sample respectively successively according to step (5), obtain yStraight 1、yStraight 2......yStraight m, m that calculation procedure (5) is measured
The mean value of the oil content of water sample is yIt is straight flat, standard deviation is yIt is straight poor, as ＞ 2.54%, step (1) to (4) is re-started to obtain
New equation is taken, until the y of the new measured value obtained according to new equationIt is straight poor/yIt is straight flat≤ 2.54%.By preferred side
Case, standard deviation can be controlled in the range of setting, so as to ensure the accuracy of direct ultraviolet AAS.
In the present embodiment, 5 water samples are measured on the different dates by direct ultraviolet AAS respectively, obtains it
A in oil content such as form 23Shown in one hurdle, its mean value is 7.328, and standard deviation is 0.1509, yIt is straight poor/yIt is straight flat=2.59%.
Measure the oil content of m water sample respectively successively by infrared spectrophotometer, obtain yRed 1、yRed 2......yRed m, meter
The mean value for calculating the oil content of the m water sample that infrared spectrophotometer is measured is yIt is red flat, standard deviation is yRed difference.By ultraviolet spectrometry
Photometry measures respectively successively the oil content of m water sample, obtains yPurple 1、yPurple 2......yPurple m, calculate ultraviolet spectrophotometry and measure
M water sample oil content mean value be yPurple is flat.Detection order and above-mentioned direct ultraviolet light splitting of two kinds of detection methods to water sample
Photometry is identical to the detection order of water sample.In the present embodiment, the A in form 21The data on one hurdle are according to ultraviolet spectrometry light
The data that degree method is obtained, A2The data on one hurdle are the data obtained according to infrared spectrophotometer.
Form 2：
Note：A1Be with GB/T7490-1987 determined by ultraviolet spectrophotometry obtain data, A2It is red with HJ637-2012
The data that outer spectrophotometry is obtained, A3It is the data obtained with direct ultraviolet spectrophotometry.
Standard deviation is less, illustrates that measurement result is more accurate.By the data in form 2, it is known that using the side of the present invention
Oil content in method measurement sewage is reliable.
In practical operation, at set intervals, can with repeat step (1) to step (4) to obtain new k values, so as to
More adapt to the situation of change of sewage.Preferably, a period of time is 30-60 days.
Above example is only the exemplary embodiment of the present invention, is not used in the restriction present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art are in the essence and protection domain of the present invention, and what the present invention was made is various
Modification or equivalent are also within the scope of the present invention.
Claims (7)
1. it is a kind of detection Oil in Sewage Water content method, it is characterised in that comprise the steps：
(1) with distilled water as blank, using the water sample of ultraviolet-visible photometer measurement first under the light irradiation of different wave length
Absorbance, and find out wherein absorbance highest wavelength X, and using the wavelength X as absorbing ripple；
(2) water sample of n parts second is taken, different degrees of dilution is carried out to the water sample of n parts second, using ultraviolet spectrophotometry or red
Outer AAS measures per part of oil content y for being diluted as the second water sample of variable concentrations1......yn；
(3) using ultraviolet-uisible spectrophotometer with the absorbance of light direct measurement n second water sample of part of absorbing wavelength λ
A1......An；
(4) equation y is setDirectly=k × A+ α, wherein yDirectlyIt is the sewage oil content obtained by direct ultraviolet AAS, A
It is the absorbance of the second water sample measured by ultraviolet-visible spectrophotometry measurement, k is the slope of straight line, and α is intercept, by step
(3) the oil content y of per part of second water sample obtained in1......ynAnd absorbance A corresponding thereto1......AnInput meter
Calculation machine carries out linear regression calculating, the value of k and α is obtained, so as to obtain the equation of direct ultraviolet spectrophotometry de termination；
(5) with the absorbance of the water sample of measurement of ultraviolet-visible spectrophotometer the 3rd, and will obtain in value substitution step (4) of absorbance
The equation for obtaining can obtain the oil content y of the 3rd water sampleDirectly。
2. the method for detection Oil in Sewage Water content according to claim 1, it is characterised in that five are chosen in the step (2)
The second water sample of part, wherein, water sample 1 is raw water sample, and water sample 2 is 75% dilution raw water sample, and water sample 3 dilutes raw water sample, water for 50%
Sample 4 is 25% dilution raw water sample, and water sample 5 is 15% dilution raw water sample.
3. the method for detection Oil in Sewage Water content according to claim 1, it is characterised in that obtain in calculation procedure (4)
Equation coefficient correlation γ, as γ ＜ 0.997, step (1) to (4) is re-started, until γ >=0.997.
4. according to the method for the detection Oil in Sewage Water content in claim 2, it is characterised in that distinguished successively according to step (5)
The oil content of m water sample of measurement, obtains yStraight 1、yStraight 2......yStraight m, the mean value for calculating the oil content of m water sample is yIt is straight flat, standard
Deviation is yIt is straight poor, work as yIt is straight poor/yIt is straight flatDuring ＞ 2.54%, step (1) to (4) is re-started to obtain new equation, until according to new
The y of new measured value that obtains of equationIt is straight poor/yIt is straight flat≤ 2.54%.
5. the method for detection Oil in Sewage Water content according to claim 4, it is characterised in that m water sample is not same date
The water sample of acquirement.
6. it is according to claim 2 detection Oil in Sewage Water content method, it is characterised in that at set intervals, repeat
Step (1) is to step (4) obtaining new k values.
7. it is according to claim 6 detection Oil in Sewage Water content method, it is characterised in that be for a period of time 30-60 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149121.8A CN106644980A (en) | 2016-12-14 | 2016-12-14 | Method for detecting oil content in sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149121.8A CN106644980A (en) | 2016-12-14 | 2016-12-14 | Method for detecting oil content in sewage |
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| Publication Number | Publication Date |
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| CN106644980A true CN106644980A (en) | 2017-05-10 |
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| CN201611149121.8A Pending CN106644980A (en) | 2016-12-14 | 2016-12-14 | Method for detecting oil content in sewage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612958A (en) * | 2018-12-18 | 2019-04-12 | 海阳市启恒环保科技有限公司 | The method and device thereof of a variety of oils concentration in water can be measured simultaneously |
| CN112161980A (en) * | 2020-08-04 | 2021-01-01 | 刘邦楠 | Water quality detection method and system for network and mobile terminal |
| US11460461B2 (en) | 2019-04-17 | 2022-10-04 | Ypf Sociedad Anónima | Method for determining oil concentration in water |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888869A (en) * | 2005-06-29 | 2007-01-03 | 赵菊英 | Method for making oil content in water have comparability measured by fluorescent method and other methods |
-
2016
- 2016-12-14 CN CN201611149121.8A patent/CN106644980A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888869A (en) * | 2005-06-29 | 2007-01-03 | 赵菊英 | Method for making oil content in water have comparability measured by fluorescent method and other methods |
Non-Patent Citations (1)
| Title |
|---|
| 高武民等: "《紫外可见分光光度计在污水含油分析中的应用》", 《石油和化工设备》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612958A (en) * | 2018-12-18 | 2019-04-12 | 海阳市启恒环保科技有限公司 | The method and device thereof of a variety of oils concentration in water can be measured simultaneously |
| US11460461B2 (en) | 2019-04-17 | 2022-10-04 | Ypf Sociedad Anónima | Method for determining oil concentration in water |
| CN112161980A (en) * | 2020-08-04 | 2021-01-01 | 刘邦楠 | Water quality detection method and system for network and mobile terminal |
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