CN112730295A - Full-automatic portable ultraviolet oil measurement device and oil measurement method - Google Patents
Full-automatic portable ultraviolet oil measurement device and oil measurement method Download PDFInfo
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- CN112730295A CN112730295A CN202110248244.1A CN202110248244A CN112730295A CN 112730295 A CN112730295 A CN 112730295A CN 202110248244 A CN202110248244 A CN 202110248244A CN 112730295 A CN112730295 A CN 112730295A
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- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 238000000691 measurement method Methods 0.000 title description 3
- 238000000605 extraction Methods 0.000 claims abstract description 114
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000003208 petroleum Substances 0.000 claims abstract description 14
- 238000012546 transfer Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 42
- 239000003921 oil Substances 0.000 claims description 24
- 235000019198 oils Nutrition 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 21
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 17
- 239000000391 magnesium silicate Substances 0.000 claims description 17
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 16
- 235000019792 magnesium silicate Nutrition 0.000 claims description 16
- 238000002835 absorbance Methods 0.000 claims description 13
- 239000000284 extract Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000010775 animal oil Substances 0.000 claims description 8
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 8
- 239000008158 vegetable oil Substances 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000012086 standard solution Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a full-automatic portable ultraviolet oil measuring device and an oil measuring method, which relate to the technical field of water quality detection, and can realize automatic measurement of the volume of a water sample, automatic reagent addition, automatic extraction, automatic transfer, automatic separation, automatic ultraviolet measurement, automatic discharge and cleaning, automatic calculation of the content of petroleum in water and formation of a test report by adopting the current standard HJ 970 plus 2018, and the whole measuring process is completely automatic. In addition, the portable automatic oil measuring method avoids the harm of harmful reagents to human bodies, reduces labor intensity, reduces errors of manual operation, improves measuring precision and working efficiency, can be mounted in the pull rod luggage case, is convenient to carry when an emergency pollution accident happens, can quickly reach the site and quickly and automatically complete measurement, and has strong practicability.
Description
Technical Field
The invention relates to the technical field of water quality detection, in particular to a full-automatic portable measuring method.
Background
At present, oil pollution in water is relatively wide, petroleum monitoring is particularly important, the existing method for measuring petroleum in surface water in China is an ultraviolet spectrophotometry, an ultraviolet spectrophotometer and some pretreatment devices are used, the devices are complex and cannot be brought to on-site measurement, and when a pollution accident occurs, only a water sample can be brought back to a laboratory for measurement, so that the opportunity for timely tracing the source of pollutants is missed. In the laboratory measurement of petroleum in water, firstly, a separating funnel is used for manual extraction, and then operators are required to contact harmful extraction reagents after the processes of layering, transferring, removing animal and vegetable oils and the like, which cannot be avoided. Also, the precision of the measurement is poor due to the inconsistency of manual operations. The existing ultraviolet spectrophotometer can not automatically add reagent, can not automatically extract and separate, also needs manual operation, and still needs to contact with harmful reagent. Therefore, in order to solve the above problems, a fully automatic method is required to replace the existing manual operation, and a measuring instrument and a water sample pretreatment device which can be conveniently brought to the site in time are also required.
Disclosure of Invention
The invention aims to provide the device, which can be used for installing a whole set of equipment in a draw-bar box, is convenient to bring to the site for use, can also be used for carrying out automatic pretreatment and automatic transfer measurement on a water sample, can solve the technical problems and realizes convenient and automatic detection on the site.
In order to achieve the purpose, the invention provides the following scheme:
the full-automatic portable ultraviolet oil measuring device provided by the invention has the advantages that the ultraviolet spectrophotometer is modified, the instrument volume is reduced on the premise of ensuring the light path, and the portable draw-bar box installation is realized. The reagent transfer device, the automatic extraction device, the separation device, the magnesium silicate column, the control system and the like are all arranged in the box; the solution transfer device is connected with the reagent, the extraction device and the ultraviolet photometer through a multi-way valve by an injection pump. The automatic extraction device extracts oil in a water sample by stirring or oscillating, and the separation device guides the extracted mixed solution into a container with a smaller diameter, so that the height of a liquid layer of the extraction liquid is increased, and the separation is facilitated. The magnesium silicate column can absorb animal and vegetable oil in the extraction liquid, and the ultraviolet spectrophotometer is used for detecting the absorbance of the extraction liquid and calculating the concentration of petroleum. The control system is used for controlling the automatic operation of the device, the device can use a storage battery power supply, a vehicle-mounted power supply and an indoor power supply, and the whole device can be arranged in the draw-bar box and is convenient to carry.
Optionally, the multi-way valve is an electromagnetic valve with a central port and a plurality of outlets, and can also be replaced by a plurality of single-way electromagnetic valves or three-way electromagnetic valves.
Optionally, the injection pump is an automatic injector with a motor drive, or a metering pump, and is connected to the control system.
Optionally, the syringe pump is connected to a central port of the multi-way valve, and other ports of the multi-way valve can be connected to an extraction reagent, an automatic extraction device, a separation device, an ultraviolet spectrophotometer, a standard sample bottle or a waste liquid bottle.
Optionally, the automatic extraction device includes an extraction flask and an automatic extractor, the automatic extractor is used for mixing the sample in the extraction flask with the extraction reagent, and a stirring motor with a stirring paddle and a magnetic stirring motor with a stirrer can be used; the extraction bottle can be a special bottle and also can be a sampling bottle for filling water samples.
Optionally, the uv spectrophotometer is used to measure the absorbance of the extraction solution at a wavelength of 225nm, and other measurement wavelengths may also be adjusted.
Meanwhile, the invention discloses an oil measuring method based on the full-automatic portable ultraviolet oil measuring device, which is characterized by comprising the following steps: the method mainly comprises the following steps:
the method comprises the following steps: the automatic extraction device is placed in a container filled with a water sample, and automatic operation is started.
Step two: the injector automatically extracts a certain volume of extraction reagent through the multi-way valve and injects the extraction reagent into the automatic extraction device;
step three: the automatic extraction device is used for stirring automatically, fully mixing and extracting the sample in the extraction bottle and the extraction reagent, and then standing for layering, wherein the extraction reagent floats on the upper layer of water due to small specific gravity.
Step four: because the volume of the extraction reagent is small, the liquid layer in the extraction device is very thin and cannot be accurately taken out. Most of the water which is already layered at the bottom in the automatic extraction device is discharged by a pump, the rest extraction liquid and a small part of water are transferred to a cylindrical separation device with a smaller diameter, and the height of the liquid layer of the extraction liquid with smaller volume in the thinner separation device is increased, so that the extraction is convenient.
Step five: the extraction liquid is pumped into a syringe by a syringe pump of the reagent transfer device and is pushed to an ultraviolet spectrophotometer by a magnesium silicate column, and animal and vegetable oils in the extraction liquid are adsorbed into magnesium silicate.
Step six: pushing the extract into a cuvette of an ultraviolet spectrophotometer, measuring the absorbance of the extraction solution at the ultraviolet wavelength of 225nm, and calculating the concentration value of petroleum in the water sample according to a formula by taking the absorbance and the concentration of the standard solution as references.
Compared with the prior art, the invention has the following technical effects:
1. according to the full-automatic portable ultraviolet oil measuring device and the oil measuring method, the ultraviolet photometer, the automatic extraction device, the separation device, the magnesium silicate column and the like are assembled in the draw-bar box, so that a portable automatic instrument is realized, the detection process is completely automated according to a standard HJ 970 and 2018 method, the device can be remotely controlled by a mobile phone, and the practicability is high;
2. the invention can automatically measure the volume of the water sample, saves the step of manually measuring the volume of the water sample by using the measuring cylinder, does not need to clean the sampling bottle and reduces the pollution of the water sample.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a full-automatic portable ultraviolet oil testing device according to the present invention;
wherein the reference numerals are: 1-extraction flask; 2-an extraction motor; 3-a syringe pump; 4-a multi-way valve; 5-reagent bottle; 6-ultraviolet spectrophotometer; 7-a separation device; 8-magnesium silicate adsorption column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a full-automatic portable ultraviolet oil measurement device, which includes an extraction bottle 1, an extraction motor 2, an injection pump 3, a multi-way valve 4, a reagent bottle 5 containing an extraction reagent, an ultraviolet spectrophotometer 6, a separation device 7, a magnesium silicate adsorption column 8, and a control system. A stirring rod with a stirring motor 2 is added into an extraction bottle 1 filled with a water sample to be detected, namely the automatic extraction device, an extraction reagent in a reagent bottle 5 is extracted by an injection pump 3 through a multi-way valve 4 and is injected into the extraction bottle 1, and the water sample to be detected and the extraction reagent are fully mixed and extracted by the extraction motor 2. Since the extracting reagent has a smaller specific gravity than water and floats on the upper surface of the extracting flask 1, but the volume of the extracting solution is small, and the diameter of the extracting flask 1 is large, the liquid layer height of the extracting solution is small, and the extracting solution cannot be accurately separated from water. The large amount of water in the extraction flask 1 is pumped out through the separation device 7, while the extraction liquid and the small amount of water remain in the separation device 7, and the liquid layer height of the extraction liquid is obviously higher than that in the extraction flask 1 (the shaded part in the separation device 7 in fig. 1) because the separation device 7 is a cylindrical container with a smaller diameter, thereby facilitating accurate extraction. The layered extraction solution is extracted by the injection pump 3 through the multi-way valve 4, pushed through the magnesium silicate adsorption column 8 and then enters a cuvette of the ultraviolet photometer 6 for measuring the absorbance, and the concentration of the petroleum in the water can be calculated because the absorbance is in direct proportion to the concentration.
In this embodiment, the uv spectrophotometer 6 is a conventional device.
In this embodiment, the automatic extraction device may be configured to mix the water sample to be tested with the extraction reagent by using the extraction motor 2, or by using an oscillation or air flow method, so that the oils in the water are extracted into the organic extraction reagent. The automatic extraction device is an existing structure and is not described herein again.
In this embodiment, the syringe pump 3 is an automatic syringe with a motor for removing the reagent and transferring the extraction solution. As shown in fig. 1, the syringe pump 3 is connected to the central port of the multi-way valve 4, and can draw in and push out the reagent or solution, the drawing in and pushing out directions are controlled by the multi-way valve 4, and the multi-way valve 4 can also be replaced by a plurality of single-way or three-way electromagnetic valves, and used as a guide for transferring the reagent and the extraction solution between the extraction bottle and the ultraviolet photometer. Meanwhile, a plurality of interfaces of the multi-way valve 4 are simultaneously communicated with the extraction bottle 1, the reagent bottle 5, a cuvette of the ultraviolet photometer 6, a standard sample bottle or a waste liquid bottle and the like.
Meanwhile, the embodiment provides a full-automatic ultraviolet oil measurement method, which is applied to the full-automatic portable ultraviolet oil measurement device and mainly comprises the following steps:
1. and (3) placing the automatic extraction device in a container filled with a water sample, and starting to automatically operate.
2. The injector automatically extracts a certain volume of extraction reagent through the multi-way valve and injects the extraction reagent into the automatic extraction device;
3. the automatic extraction device is used for stirring automatically, fully mixing and extracting the sample in the extraction bottle and the extraction reagent, standing and layering, and floating on the upper layer of water due to the small specific gravity of the reagent.
4. Because the volume of the extraction reagent is small, the height of a liquid layer in the extraction device is very small, and the liquid layer cannot be accurately taken out. Most of the layered water in the automatic extraction device is discharged by a pump, the rest extraction liquid and a small part of water are transferred to a cylindrical separation device with a smaller diameter by the pump, and the height of the liquid layer of the extraction liquid with smaller volume in a thinner separation cylinder is increased, so that the extraction is convenient to absorb.
5. The extraction liquid is pumped into a syringe by a syringe pump of the reagent transfer device and is pushed to an ultraviolet spectrophotometer by a magnesium silicate column, and animal and vegetable oils in the extraction liquid are adsorbed into magnesium silicate.
6. And pushing the extract into a cuvette of an ultraviolet photometer, measuring the absorbance of the extraction solution at the ultraviolet wavelength of 225nm, and calculating the concentration value of petroleum in the water sample according to a formula by taking the absorbance and the concentration of the standard solution as the reference.
Therefore, the invention adopts the current standard HJ 970 and 2018, can realize automatic measurement of the volume of a water sample, automatic reagent addition, automatic extraction, automatic separation, automatic transfer, automatic adsorption of animal and vegetable oil, automatic ultraviolet measurement, automatic discharge and cleaning, automatic calculation of the oil content in water and formation of a test report, and realizes full automation of the whole measurement process. In addition, the automatic oil measuring method avoids the harm of harmful reagents to human bodies, reduces the labor intensity, reduces the errors of manual operation, improves the precision of measurement and has strong practicability.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a full-automatic portable ultraviolet surveys oily device which characterized in that: the device comprises a solution transfer device, an automatic extraction device, a separation device, a magnesium silicate adsorption column, an ultraviolet spectrophotometer and a control system, wherein the solution transfer device is connected with a reagent, the extraction device, the separation device and the ultraviolet spectrophotometer through a multi-way valve by an injection pump; the automatic extraction device mixes the water sample with the reagent in a stirring or oscillating mode to extract petroleum into the extraction reagent; the separation device guides the extracted mixed solution into a container with a smaller diameter, so that the height of a liquid layer of the extraction liquid is increased, and the separation is facilitated; the magnesium silicate column can adsorb animal and vegetable oil in the extraction liquid, and the ultraviolet spectrophotometer is used for detecting the absorbance of the extraction liquid and calculating the concentration of petroleum; the control system is used for controlling the automatic operation of the device.
2. The full-automatic portable ultraviolet oil testing device of claim 1, characterized in that: the solution transfer device comprises an injection pump, a multi-way valve or a plurality of electromagnetic valves, wherein the injection pump is an automatic injector with a motor drive, is connected with a central interface of the multi-way valve and is communicated with one of a plurality of outlets of the multi-way valve, a reagent can be added into an extraction device filled with a water sample through the multi-way valve for automatic extraction, and the separated extraction liquid can also be transferred into an ultraviolet spectrophotometer for oil measurement.
3. The full-automatic portable ultraviolet oil testing device of claim 1, characterized in that: the automatic extraction device is an automatic extractor for filling a water sample, and the water sample and the reagent are fully mixed, extracted and automatically layered by an automatic stirring or oscillation method.
4. The full-automatic portable ultraviolet oil testing device of claim 1, characterized in that: the separating device is a cylindrical container with a diameter smaller than that of the extractor, after extraction is completed, the solution with the extraction reagent in the extracting device is transferred to the separating container, and because the volume of the extraction liquid is smaller, the height of a liquid layer of the extraction liquid is increased in the thinner cylindrical container, so that the extraction of the solution transferring device is facilitated, and the extraction can be accurately transferred to the ultraviolet spectrophotometer for measurement.
5. The full-automatic portable ultraviolet oil testing device of claim 1, characterized in that: the magnesium silicate adsorption column is arranged in a flow path before the extraction liquid reaches the ultraviolet spectrophotometer, when the extraction liquid passes through the magnesium silicate adsorption column, animal and vegetable oils in the extraction liquid are adsorbed in the magnesium silicate, the solution reaching the ultraviolet spectrophotometer for measurement is a solution only containing petroleum, and the measurement result is the concentration of the petroleum.
6. The full-automatic portable ultraviolet oil testing device of claim 1, characterized in that: and the ultraviolet photometer measures the absorbance of the extraction liquid by using the wavelength of 225nm, and calculates the concentration of petroleum in the extracted water sample according to the absorbance of the standard solution and the concentration of the standard sample.
7. An oil measuring method based on the full-automatic portable ultraviolet oil measuring device of any one of claims 1-6 is characterized in that: the method comprises the following automatic operation steps:
the method comprises the following steps: placing the automatic extraction device in a container containing a water sample, and starting automatic operation;
step two: the injector automatically extracts a certain volume of extraction reagent through the multi-way valve and injects the extraction reagent into the automatic extraction device;
step three: the automatic extraction device is used for automatically stirring, fully mixing and extracting the sample in the extraction bottle and the extraction reagent, and then standing for layering, wherein the extraction reagent floats on the upper layer of water due to small specific gravity;
step four: because the volume of the extraction reagent is small, the liquid layer in the extraction device is very thin and cannot be accurately taken out, most of the water which is already layered at the bottom in the automatic extraction device is discharged by a pump, the rest extraction liquid and a small part of water are transferred to a cylindrical separation device with a small diameter, the height of the liquid layer of the extraction liquid with small volume in the thin separation device is increased, and the extraction is convenient to absorb;
step five: extracting the extract liquid into an injector by an injection pump of the reagent transfer device, pushing the extract liquid to an ultraviolet spectrophotometer through a magnesium silicate column, and adsorbing animal and vegetable oils in the extract liquid into magnesium silicate;
step six: pushing the extract into a cuvette of an ultraviolet spectrophotometer, measuring the absorbance of the extraction solution at the ultraviolet wavelength of 225nm, and calculating the concentration value of petroleum in the water sample according to a formula by taking the absorbance and the concentration of the standard solution as references.
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| CN202110248244.1A CN112730295A (en) | 2021-03-08 | 2021-03-08 | Full-automatic portable ultraviolet oil measurement device and oil measurement method |
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| CN202110248244.1A CN112730295A (en) | 2021-03-08 | 2021-03-08 | Full-automatic portable ultraviolet oil measurement device and oil measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062292A (en) * | 2021-11-17 | 2022-02-18 | 江苏省环境监测中心 | Extractor for oil measurement, full-automatic ultraviolet oil measurement device and oil measurement method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526208A (en) * | 2016-10-26 | 2017-03-22 | 上海昂林科学仪器有限公司 | Flow path device and online oil content analyzer with same |
| CN109110856A (en) * | 2018-11-02 | 2019-01-01 | 上海昂林科学仪器股份有限公司 | Oils auto extractive system and analysis system in a kind of water |
| CN109520955A (en) * | 2018-12-11 | 2019-03-26 | 泰安市科瑞光学仪器有限公司 | A kind of ultraviolet spectrometry oil content analyzer and its application method |
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