CN110261510A - A kind of on-line automatic sampling device detected for volatile organic matter in water - Google Patents
A kind of on-line automatic sampling device detected for volatile organic matter in water Download PDFInfo
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- CN110261510A CN110261510A CN201910630038.XA CN201910630038A CN110261510A CN 110261510 A CN110261510 A CN 110261510A CN 201910630038 A CN201910630038 A CN 201910630038A CN 110261510 A CN110261510 A CN 110261510A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000005070 sampling Methods 0.000 title claims abstract description 33
- 239000005416 organic matter Substances 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000000642 dynamic headspace extraction Methods 0.000 claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 18
- 239000012086 standard solution Substances 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 238000010926 purge Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 2
- 239000012855 volatile organic compound Substances 0.000 description 11
- 238000005406 washing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004817 gas chromatography Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- -1 hot systems Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001819 mass spectrum Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007886 mutagenicity Effects 0.000 description 1
- 231100000299 mutagenicity Toxicity 0.000 description 1
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004094 preconcentration Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012899 standard injection Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
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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)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of on-line automatic sampling devices detected for volatile organic matter in water, including a purge and trap system, the purge and trap system includes a purging bottle, the purging bottle connects a diaphragm valve through the first peristaltic pump, for introducing the first branch line of cleaning solution or connecting the second branched pipe road at water sampling water source, the second branched pipe road is provided with filter device for the connection of the diaphragm valve selectivity；The purge and trap system further includes a waste liquid discharge line, and the second peristaltic pump that the waste liquid is discharged is provided on the waste liquid discharge line, and the end of the waste liquid discharge line is connected with waste liquid collection vessel；The purge and trap system is also connected with an internal standard solution and is pumped into pipeline, and the internal standard solution is pumped into the end connection internal standard solution apparatus for placing of pipeline.
Description
Technical field
The present invention relates to a kind of on-line automatic sampling devices for volatile organic matter (VOCs) detection in water.
Background technique
According to the definition of the World Health Organization, volatile organic matter VOCs (volatile organic compounds) is
At normal temperature, whole organic compounds of the boiling point between 50 DEG C to 260 DEG C.VOCs is pollutant important in a kind of water,
Main component is the compounds such as aliphatic hydrocarbon, aromatic hydrocarbon, halogenated hydrocarbons, aldehydes and ketone.The chemical property of this kind of chemical substance is stablized,
It is not easy to decompose, it is easy to cause underground water pollution, and it is with carcinogenicity, mutagenicity and to the toxic of other systems.
And with the process of industrialization development, the chemical substance that we face becomes more complicated, and thus caused environmental problem is to people
Class brings relatively serious influence；Environmental pollution, especially atmospheric environment and water environment pollution increasingly become concerned by people
Main way；The VOCs that the quality of especially drinking water and other water sources directly influences in people's health, especially water gives
The health bring of people endangers.
On the other hand, since the content of VOCs in water is relatively low, general device is difficult to be detected, so in order to reach
Higher testing requirements, it usually needs pre-treatment (pre-concentration) is carried out to sample.With traditional solid phase extraction, Head space, molten
The methods of agent extraction is compared, and Puffing and trapping has that bioaccumulation efficiency is high, pollution is small, sampling amount is small, high sensitivity and is easy reality
The advantages that existing on-line checking, thus be widely used in the detection of VOCs in water, at the same gas chromatography-mass spectrum due to
It has the characteristics that qualitative and quantitative precision is high, is combined in VOCs detection in water and plays an important role with purge and trap.
Currently, mostly use spot sampling greatly for the method that detects VOCs in water in the prior art, laboratory it is offline from
The dynamic method that sample introduction is analyzed, but such method can not also liberate the situation artificially participated in, such as artificial sample, setting-out etc..It is thus existing
Some detection methods are unable to satisfy the continuous monitoring in scene of water pollution, especially solution of emergent event.So developing in a kind of water
VOCs online automatic monitor device is extremely urgent.
Summary of the invention
Technical problem to be solved by the present invention lies in provide it is a kind of can be improved whole system detection precision and accuracy,
Realize the on-line automatic sampling device for volatile organic matter detection in water of on-line automatic sample introduction.
Its technical problem to be solved can be implemented by the following technical programs.
A kind of on-line automatic sampling device detected for volatile organic matter in water, feature are, including a purging is caught
Collecting system, the purge and trap system include a purging bottle, and the purging bottle connects a diaphragm valve through the first peristaltic pump, described to lead
Flow valve selectivity connection for introduce cleaning solution the first branch line or connection water sampling water source second branched pipe road,
The second branched pipe road is provided with filter device；The purge and trap system further includes a waste liquid discharge line, described useless
The second peristaltic pump that the waste liquid is discharged is provided on liquid discharge line, the end of the waste liquid discharge line is connected with waste liquid
Collection vessel；The purge and trap system is also connected with an internal standard solution and is pumped into pipeline, and the internal standard solution is pumped into the end connection of pipeline
Internal standard solution apparatus for placing.
As one of the preferred embodiment of the present invention, the internal standard solution is pumped into the pumping source of pipeline and is placed on pipeline for one
Syringe pump.
Also as one of the preferred embodiment of the present invention, the diaphragm valve is a three-way magnetic valve, the three-way magnetic valve
Outlet connect first peristaltic pump, two entrances are separately connected first branch line and second branched pipe road.
Also as one of the preferred embodiment of the present invention, the cleaning solution is pure water.
Further improvement equally as the technical program, the rotational speed regulation resolution ratio of first peristaltic pump exist
Between 0.01rpm-10rpm.
The beneficial effects of the present invention are: the present invention by setting water sample sampling and pipeline washing device, realize automatically into
Sample and pipeline-cleaning can prevent human error and cross contamination；Automatic internal standard may be implemented by the internal standard sampling device of setting
Sample introduction improves the accuracy of system, provides a special quality control for sampled data and guarantees.
The present invention has the advantage that the present invention has on-line automatic sample introduction and is automatically added to interior device for mark, it can be automatic complete
At water sampling, internal standard injection and automatic cleaning and etc., greatly improve the precision and accuracy of whole system detection；To keep away
The inaccuracy that traditional equipment causes testing result without internal standard adding apparatus and artificial participate in is exempted from.Whole device can realize scene
Continuous monitoring, and whole device structure is simple, can with gas-chromatography (GC) and gas chromatograph-mass spectrometer (GC/MS) into
Row coupling.
The present invention can accomplish online long-term continuous sample introduction with respect to conventional method, can obtain it is real-time, accurately monitor number
According to, can pollution condition according to the data analysis water source monitored and important pollutant, and then government regulation can be given
Department formulates improvement policy and provides data supporting.
Detailed description of the invention
Make one to a specific embodiment of the invention with reference to the accompanying drawing to be described in detail.
Fig. 1 is the on-line automatic sampling device schematic diagram of the present invention.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Referring to Fig.1, the present invention provides a kind of on-line automatic sample introductions for volatile organic matter (VOCs) detection in water
Device includes a water sample sampling and pipeline washing device 1, and one end connects water source first, and the other end connects purge and trap system
4, water sample is extracted into according to timing from water source by sampling and pipeline washing device 1 by purge and trap system 4；Simultaneously by internal standard into
Sampling device 3 internal standard solution be extracted into purge and trap system 4 (wherein purge and trap system from structure mainly by purging bottle, it is infrared plus
The compositions such as hot systems, water scavenging system, pyrolysis analysis system, organic matter enrichment system and flow path system, since it is not as the application
Emphasis, so mutual connection relationship and positional relationship herein just no longer be described in detail)；Then start purge and trap system
4, water sample is purged, be enriched with and is parsed；Finally the waste liquid in purge and trap system 4 is discharged by waste liquid discharger 2；Most
It is cleaned afterwards by sampling and pipeline washing device 1 by switching connection cleaning solution (pure water).It, can under the control of timing
Sampling automatically is completed, automatically plus internal standard, automatic cleaning and automatic waste discharge liquid etc. operate.
Wherein, the three-way magnetic valve in sampling and pipeline washing device 1 can be to water sample in water source and pure according to timing
Water carries out selection switching, is realized by being respectively communicated with different bypass lines.In structure, the water sampling and pipeline are clear
Cleaning device 1 includes a three-way magnetic valve, and the filter, the high precision peristaltic pump A that connect respectively with the three-way magnetic valve
And the volumetric flask equipped with pure water, the high precision peristaltic pump A are connect with purge and trap system 4.In use, by three-way magnetic valve
To choose whether then to pump to purging by high precision peristaltic pump A by the filtered water sample of filter or pure water
It is purged in bottle in trapping system 4, next step operation is then carried out according to timing.
The above-mentioned dedicated filter in sampling and pipeline washing device 1 must be able to filter out large particle in water and
Other sundries.On the other hand, high precision peristaltic pump A (the rotational speed regulation resolution ratio of pump in sampling and pipeline washing device 1
It is adjustable between 0.01rpm-10rpm, it adjusts resolution ratio and is better than 0.01rrpm, flow is adjustable 0.01ml/min-1140ml/
Min), accurate quantification can be carried out to water sample, sample introduction water size can be adjusted according to demand.
Another high-precision syringe pump being arranged in internal standard sampling device 3 then may be implemented to carry out internal standard precisely quantitatively,
Guarantee repeatability simultaneously.The internal standard solution in internal standard liquid container is pumped into purge and trap system by syringe pump.As schemed
Show, in structure, (liquid measure accuracy error is better than 0.1% to the high-precision syringe pump, and the repeatability of each liquid measure is better than
0.1%).Connection is equipped with the volumetric flask of internal standard solution, and the high-precision syringe pump is connect with purge and trap system 4.
The waste liquid discharger 2 includes a peristaltic pump B, and the waste liquid bottle connecting with the peristaltic pump B, described compacted
Dynamic pump B is connect with purge and trap system 4, by waste liquid (the common type of peristaltic pump B in peristaltic pump B discharge purge and trap system 4
Number, since it is mainly used for drain, do not need high-precision).
The purge and trap system 4 is by integrating the functions such as sampling, water removal, enrichment, thermal desorption after optimizing, after optimization
System can facilitate and coupled with various model GC and GC/MS, be easy to implement on-line automatic sample introduction and detection.
That is, above-mentioned on-line automatic sampling device provided by the invention, solves the on-line automatic sample introduction of water sample, greatlys save
Manpower and reduce human error；Internal standard sampling device is added simultaneously, greatly improves the measurement accuracy of system；Feasible system
It is continuous automatic unattended, and then guarantee system monitoring data.Structure is simple, and precision is high, integrated convenient for whole system, is suitable for
GC or GC/MS are coupled.
Detailed construction feature of the invention that the present invention is explained by the above embodiments, but the invention is not limited to above-mentioned
Detailed construction feature does not mean that the present invention must rely on above-mentioned detailed construction feature and could implement.Technical field
Technical staff is it will be clearly understood that any improvement in the present invention, to the equivalence replacement and accessory of component selected by the present invention
Increase, the selection of concrete mode etc., all of which fall within the scope of protection and disclosure of the present invention.
Claims (5)
1. a kind of on-line automatic sampling device detected for volatile organic matter in water, which is characterized in that caught including a purging
Collecting system, the purge and trap system include a purging bottle, and the purging bottle connects a diaphragm valve through the first peristaltic pump, described to lead
Flow valve selectivity connection for introduce cleaning solution the first branch line or connection water sampling water source second branched pipe road,
The second branched pipe road is provided with filter device；The purge and trap system further includes a waste liquid discharge line, described useless
The second peristaltic pump that the waste liquid is discharged is provided on liquid discharge line, the end of the waste liquid discharge line is connected with waste liquid
Collection vessel；The purge and trap system is also connected with an internal standard solution and is pumped into pipeline, and the internal standard solution is pumped into the end connection of pipeline
Internal standard solution apparatus for placing.
2. the on-line automatic sampling device for volatile organic matter detection in water according to claim 1, which is characterized in that
The pumping source that the internal standard solution is pumped into pipeline is a syringe pump being placed on pipeline.
3. the on-line automatic sampling device for volatile organic matter detection in water according to claim 1, which is characterized in that
The diaphragm valve is a three-way magnetic valve, and the outlet of the three-way magnetic valve connects first peristaltic pump, and two entrances connect respectively
Connect first branch line and second branched pipe road.
4. the on-line automatic sampling device for volatile organic matter detection in water according to claim 1, which is characterized in that
The cleaning solution is pure water.
5. the on-line automatic sampling device for volatile organic matter detection in water according to claim 1, which is characterized in that
The rotational speed regulation resolution ratio of first peristaltic pump is between 0.01rpm-10rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630038.XA CN110261510A (en) | 2019-07-12 | 2019-07-12 | A kind of on-line automatic sampling device detected for volatile organic matter in water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630038.XA CN110261510A (en) | 2019-07-12 | 2019-07-12 | A kind of on-line automatic sampling device detected for volatile organic matter in water |
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| CN110261510A true CN110261510A (en) | 2019-09-20 |
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ID=67925954
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| CN201910630038.XA Pending CN110261510A (en) | 2019-07-12 | 2019-07-12 | A kind of on-line automatic sampling device detected for volatile organic matter in water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141724A (en) * | 2020-03-19 | 2020-05-12 | 茅台学院 | On-line detection device for saccharomyces cerevisiae fermentation broth yeast activity based on Raman spectrum |
| CN114280187A (en) * | 2021-12-24 | 2022-04-05 | 生态环境部南京环境科学研究所 | A kind of detection and analysis method and equipment of benzene series in groundwater of polluted site |
| CN115541303A (en) * | 2022-08-04 | 2022-12-30 | 安徽省生态环境科学研究院 | A soil and water monitoring system for polluted land |
| CN115754326A (en) * | 2022-11-25 | 2023-03-07 | 广州禾信仪器股份有限公司 | Online sample introduction device and method |
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2019
- 2019-07-12 CN CN201910630038.XA patent/CN110261510A/en active Pending
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|---|---|---|---|---|
| US4411157A (en) * | 1982-05-27 | 1983-10-25 | Babin Eugene R | Contamination-free transfer and purge apparatus |
| US6112602A (en) * | 1993-06-14 | 2000-09-05 | New Jersey Institute Of Technology | Analytical apparatus and instrumentation for on-line measurement of volatile organic compounds in fluids |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141724A (en) * | 2020-03-19 | 2020-05-12 | 茅台学院 | On-line detection device for saccharomyces cerevisiae fermentation broth yeast activity based on Raman spectrum |
| CN114280187A (en) * | 2021-12-24 | 2022-04-05 | 生态环境部南京环境科学研究所 | A kind of detection and analysis method and equipment of benzene series in groundwater of polluted site |
| CN115541303A (en) * | 2022-08-04 | 2022-12-30 | 安徽省生态环境科学研究院 | A soil and water monitoring system for polluted land |
| CN115754326A (en) * | 2022-11-25 | 2023-03-07 | 广州禾信仪器股份有限公司 | Online sample introduction device and method |
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