CN102507263A - Sampling device for large-volume water sample of semi-volatile organic compounds - Google Patents
Sampling device for large-volume water sample of semi-volatile organic compounds Download PDFInfo
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- CN102507263A CN102507263A CN2011102964883A CN201110296488A CN102507263A CN 102507263 A CN102507263 A CN 102507263A CN 2011102964883 A CN2011102964883 A CN 2011102964883A CN 201110296488 A CN201110296488 A CN 201110296488A CN 102507263 A CN102507263 A CN 102507263A
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Abstract
The invention provides a sampling device for a large-volume water sample of semi-volatile organic compounds, belongs to the technical field of sampling of semi-volatile organic pollutants in a water body. The device comprises a peristaltic pump, a filter membrane tray, an adsorbing material sleeve and a flowmeter, wherein the peristaltic pump is used for sucking the water sample through a sampling tube and conveying the water sample to the filter membrane tray; the filter membrane tray is used for filtering the water sample sucked by the peristaltic pump and conveying the filtered water sample to the adsorbing material sleeve; the adsorbing material sleeve is used for adsorbing sol-state granules in the water sample through polyurethane foam, activated carbon or XAD2 resin which is arranged in the adsorbing material sleeve and is used for enriching; and the flowmeter is used for metering the volume of the sampled water sample. The sampling device has the characteristics of compact structure, simplicity in operation and convenience for carrying, can finish filtering, adsorption and sampling volume calculation of the water sample at one time during the sampling process so as to provide convenience for in-situ enriching of the large-volume water sample, and can be used for in-situ sampling of water samples of shallow lakes, rivers, reservoirs and other various water bodies.
Description
Technical field
The present invention relates to a kind of semi-volatile organic matter water sample sampling apparatus substantially, belong to the Sampling techniques field of half volatile organic contaminant in the water body.
Background technology
Semi-volatile organic matter (SVOC) refers generally to boiling point at 170～350 ℃, and vapor pressure is at the organism of 0.1～10-7mmHg.Wherein a part of semi-volatile organic matter is one type to have high toxicity, persistence, be easy to assemble in vivo and long-distance migration and deposition, environment and human body had the organic chemical pollutant of serious harm.
Water environment is one of main place of partly waving the organic matter enrichment, and municipal effluent, reservoir, rivers and Hu Hai exist.In the investigation for natural background levels such as reservoir, rivers, Hu Hai and level of pollution; Because partly to wave the content of organic matter in water body lower for these, a water sample often need be gathered hundreds of to a few kilolitre water bodys and they are concentrated just can make it to reach the lowest detection lower limit that certain analytical instrument can reach.
The collection of traditional big water by volume body receives the influence of factors such as transportation, space, pollution, is difficult for taking back lab analysis from the big water by volume of collection in worksite.
Summary of the invention
The objective of the invention is to above-mentioned existing technological deficiency, provide a kind of can be directly from the scene to the device of big water by volume appearance in-situ enrichment.
The objective of the invention is to realize through following technical scheme:
Semi-volatile organic matter is the water sample sampling apparatus substantially, comprising:
Peristaltic pump is used for extracting water sample through sampling pipe, and said water sample is transported on the filter membrane pallet;
The filter membrane pallet be used for the water sample of peristaltic pump pumps is filtered, and the water sample after will filtering is transported on the sorbing material sleeve;
The sorbing material sleeve is used for enrichment through set inside with isocyanurate foam, activated charcoal or XAD
2Dissolved colloidal state particle in the said water sample of resin adsorption;
Flowmeter is used to measure the volume of water sampling.
Semi-volatile organic matter provided by the invention water sample sampling apparatus substantially has compact conformation, simple, convenient characteristics of carrying; Can once accomplish filtration, absorption, the sampling volume calculating of water sample in sampling process; Provide convenience for big water by volume appearance in-situ enrichment, can be used for the original position sampling of all kinds of water body water samples such as shallow lake, river, reservoir.
Description of drawings
Fig. 1 is the semi-volatile organic matter that provides of the specific embodiment of the invention structural representation of water sample sampling apparatus substantially.
Embodiment
The specific embodiment of the invention provides a kind of semi-volatile organic matter water sample sampling apparatus substantially, and is as shown in Figure 1, comprising:
Peristaltic pump 1 is used for extracting water sample through sampling pipe, and said water sample is transported on the filter membrane pallet 2;
Filter membrane pallet 2 be used for the water sample that peristaltic pump 1 extracts is filtered, and the water sample after will filtering is transported on the sorbing material sleeve 6;
Sorbing material sleeve 6 is used for enrichment through set inside with isocyanurate foam, activated charcoal or XAD
2Dissolved colloidal state particle in the said water sample of resin adsorption;
Flowmeter 7 is used to measure the volume of water sampling.
Concrete; Peristaltic pump 1 can be connected with sampling pipe with O-ring seal through web member; Sampling pipe can be silica gel hose or stainless steel flexible hose, and the power supply of peristaltic pump 1 can adopt 220V alternating current or accumulator to drive, and the water withdrawal of peristaltic pump 1 is 10ml-5000ml/min.Clip 4 lockings are used in the top of filter membrane pallet 2 and intake-outlet junction, bottom; Filter membrane pallet 2 is superimposed by two round stainless steel discs; The diameter of round stainless steel disc is 10-500mm, and makes two round stainless steel disc centres closed, two round stainless steel discs be provided with netted stainless steel coil in order to support filter membrane through the pressurization flange, and the bottom of filter membrane pallet 2 is provided with three to four support columns 3; Use filter membrane material in the middle of the filter membrane pallet 2, its aperture is 0.4-3um.On filter membrane pallet 2, can also be provided with controlled pressure valve 5, when being used for water sample after beginning to sample and being full of filter membrane pallet 2, regulate the air pressure balance in the filter membrane pallet 2, can be covered with filter membrane uniformly to keep water sample, and the water sample flow velocity of guaranteeing the quality steadily.Sorbing material sleeve 6 is processed column by stainless steel or glass material, and the two ends of sorbing material sleeve 6 connect the sampling pipe interface and use reversal of the natural order of things thorn shape.
The principle of work and the method for operating of this embodiment are following:
Semi-volatile organic matter that this embodiment provides substantially the water sample sampling apparatus according to above-mentioned assembling after, at first sampling pipe is put into water body, and the volume that needs sampling, the parameters such as operating rate of peristaltic pump 1 is set in flowmeter 7.Before formal energized sampling, use entanglement to surround sample water pipe place, block pipeline to prevent that the bulky grain thing from getting into.After the preparatory stage completion; The power supply of connecting peristaltic pump 1 begins to extract water sample; Water sample is crossed sorbing material, process flowmeter 7 discharges at last in the sorbing material sleeve 6, complete system of whole composition then through the membrane filtration of sampling pipe elder generation in filtering membrane pallet 2.
Embodiment 1:
Certain reservoir organo-chlorine pesticide class is partly waved the big water by volume sampling of organic matter (as: DDT mirex etc.).Adopt this device to the enrichment of sampling of big water by volume appearance, to calculate the concentration of various machine chloro pesticides in certain reservoir water body.
All will use acetone experimental apparatus and related tool before the experiment with after the experiment, and operating process must be with all the PE gloves to prevent pollution; Quartz fibre filter membrane (adopt diameter 293mm) and aluminium foil are respectively through 400 ℃ (wrap leave opening 6h processing with aluminium foils), 300 ℃ of pyroprocessing;
At first,, surround sample water pipe place, block pipeline to prevent big suspension with entanglement in selected reservoir sample point.After the mode that provides according to this embodiment connects device, parameter is set is: gather water sample cumulative volume 200L, the rotational speed regulation of peristaltic pump 1 remains about 0.1L/min current.
Connect the power supply of peristaltic pump 1, begin sampling.
Water sample passes through sampling pipe; Through filtering membrane pallet 2, regulate the air pressure balance in pressure valve 5 holding trays, waterflow stabilization; Make it pass through the quartz fibre filter membrane of filter membrane pallet 2 uniformly; Filter out some particles, then through the sorbing material PUF in the sorbing material sleeve 6, the water sample that is used to adsorb the dissolved colloidal state particle, come out is afterwards discharged through flowmeter 7.
Embodiment 2:
The big water by volume original position sampling of certain reservoir dioxin.Adopt this device to the enrichment of sampling of big water by volume appearance, to calculate the concentration of dioxin in certain reservoir water body.
All will use acetone experimental apparatus and related tool before the experiment with after the experiment, and operating process must be with all the PE gloves to prevent pollution; Quartz fibre filter membrane (adopt diameter 293mm) and aluminium foil are respectively through 400 ℃ (wrap leave opening 6h processing with aluminium foils), 300 ℃ of pyroprocessing;
At first,, surround sample water pipe place, block pipeline to prevent big suspension with entanglement in selected reservoir sample point.After the mode that provides according to this embodiment connects device, parameter is set is: gather water sample cumulative volume 220L, the rotational speed regulation of peristaltic pump 1 remains about 0.1L/min current.
Connect the power supply of peristaltic pump 1, begin sampling.
Water sample passes through sampling pipe; Through filtering membrane pallet 2, regulate the air pressure balance in pressure valve 5 holding trays, waterflow stabilization; Make it pass through the quartz fibre filter membrane of filter membrane pallet 2 uniformly; Filter out some particles, then through the sorbing material PUF in the sorbing material sleeve 6, the water sample that is used to adsorb the dissolved colloidal state particle, come out is afterwards discharged through flowmeter 7.
The technical scheme that adopts present embodiment to provide; Have compact conformation, simple, convenient characteristics of carrying; Can once accomplish filtration, absorption, the sampling volume calculating of water sample in sampling process; Provide convenience for big water by volume appearance in-situ enrichment, can be used for the original position sampling of all kinds of water body water samples such as shallow lake, river, reservoir.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (8)
1. a semi-volatile organic matter cardinal principle water sample sampling apparatus is characterized in that, comprising:
Peristaltic pump is used for extracting water sample through sampling pipe, and said water sample is transported on the filter membrane pallet;
The filter membrane pallet be used for the water sample of peristaltic pump pumps is filtered, and the water sample after will filtering is transported on the sorbing material sleeve;
The sorbing material sleeve is used for enrichment through set inside with isocyanurate foam, activated charcoal or XAD
2Dissolved colloidal state particle in the said water sample of resin adsorption;
Flowmeter is used to measure the volume of water sampling.
2. semi-volatile organic matter according to claim 1 is the water sample sampling apparatus substantially, it is characterized in that, said peristaltic pump is connected with sampling pipe with O-ring seal through web member, and said sampling pipe is silica gel hose or stainless steel flexible hose.
3. semi-volatile organic matter according to claim 1 is the water sample sampling apparatus substantially, it is characterized in that, the power supply of said peristaltic pump adopts 220V alternating current or accumulator to drive, and the water withdrawal of peristaltic pump is 10ml-5000ml/min.
4. semi-volatile organic matter according to claim 1 is the water sample sampling apparatus substantially, it is characterized in that, locked clip device is used in said filter membrane pallet top and intake-outlet junction, bottom.
5. semi-volatile organic matter according to claim 1 is the water sample sampling apparatus substantially; It is characterized in that; Said filter membrane pallet is superimposed by two round stainless steel discs; The diameter of said round stainless steel disc is 10-500mm, and makes two round stainless steel disc centres closed, two round stainless steel discs be provided with netted stainless steel coil in order to support filter membrane through the pressurization flange, and the bottom of said filter membrane pallet is provided with three to four support columns.
6. semi-volatile organic matter according to claim 5 is the water sample sampling apparatus substantially, it is characterized in that, uses filter membrane material in the middle of the said filter membrane pallet, and its aperture is 0.4-3um.
7. according to claim 1,5 or 6 described semi-volatile organic matters cardinal principle water sample sampling apparatuses; It is characterized in that; This device also comprises the controlled pressure valve, when being used for water sample after beginning to sample and being full of the filter membrane pallet, regulates the air pressure balance in the filter membrane pallet; Can be covered with filter membrane uniformly to keep water sample, and the water sample flow velocity of guaranteeing the quality is steady.
8. semi-volatile organic matter according to claim 1 is the water sample sampling apparatus substantially, it is characterized in that said sorbing material sleeve is processed column by stainless steel or glass material, and the two ends of said sorbing material sleeve connect the sampling pipe interface and use reversal of the natural order of things thorn shape.
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| CN201110296488.3A CN102507263B (en) | 2011-09-28 | 2011-09-28 | Sampling device for large-volume water sample of semi-volatile organic compounds |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411794A (en) * | 2013-07-18 | 2013-11-27 | 中国科学院广州地球化学研究所 | Apparatus for acquiring trace quantity of organic pollutants in large volume of seawater, and acquisition system thereof |
| CN103630432A (en) * | 2012-08-23 | 2014-03-12 | 中国科学院地理科学与资源研究所 | Portable water nitrogen and oxygen isotope filtration and adsorption device and absorption method |
| CN103645113A (en) * | 2013-12-16 | 2014-03-19 | 山东省城市供排水水质监测中心 | Method and device for determining total quantity of smelly substances in water |
| CN103674668A (en) * | 2013-12-11 | 2014-03-26 | 南昌航空大学 | Online pre-separation and enrichment device for pollutants in large-volume water sample |
| CN105445061A (en) * | 2016-02-01 | 2016-03-30 | 南京工业职业技术学院 | Active sampling system of persistent organic pollutants PAHs in atmosphere |
| CN105758675A (en) * | 2016-04-26 | 2016-07-13 | 天津市环境保护科学研究院 | Active sampler for water persistent organic pollutants based on suction filtration and preconcentration |
| CN104359719B (en) * | 2014-12-09 | 2017-06-06 | 苏州汉能环保材料科技有限公司 | Volatile organic matter nanometer continuous sampler in a kind of water |
| CN107376488A (en) * | 2017-08-15 | 2017-11-24 | 江苏省环境监测中心 | Suitable for the filtration in-situ system of the water sample containing heavy metal |
| CN107560891A (en) * | 2017-09-05 | 2018-01-09 | 大连民族大学 | The passive sampling apparatus of polar contaminants in a kind of collection water body |
| CN108982711A (en) * | 2018-09-30 | 2018-12-11 | 浙江工业大学 | A kind of draw-out device and its application in grain heap in volatile component detection |
| CN111795862A (en) * | 2020-07-14 | 2020-10-20 | 江苏理工学院 | Device and method for sampling dioxin in water with automatic extraction function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2539511A1 (en) * | 1983-01-14 | 1984-07-20 | Marseille Sa Eaux | Linear-current biodetector device associated with a detector of strong turbidity for monitoring water pollution |
| US5010776A (en) * | 1989-05-04 | 1991-04-30 | Iit Research Institute | Environmental contamination detection and analyzing system and method |
| CN2163381Y (en) * | 1993-07-21 | 1994-04-27 | 山东大学 | Enriching column water quality detecting automatic sampler |
| CN101476993A (en) * | 2009-01-19 | 2009-07-08 | 北京大学 | Passive semi-volatile atmosphere organic pollutant sampling apparatus |
| CN102062711A (en) * | 2010-12-08 | 2011-05-18 | 济南市供排水监测中心 | Organic pollutant enriching device and method for pretreatment of water sample with bulk mass |
-
2011
- 2011-09-28 CN CN201110296488.3A patent/CN102507263B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2539511A1 (en) * | 1983-01-14 | 1984-07-20 | Marseille Sa Eaux | Linear-current biodetector device associated with a detector of strong turbidity for monitoring water pollution |
| US5010776A (en) * | 1989-05-04 | 1991-04-30 | Iit Research Institute | Environmental contamination detection and analyzing system and method |
| CN2163381Y (en) * | 1993-07-21 | 1994-04-27 | 山东大学 | Enriching column water quality detecting automatic sampler |
| CN101476993A (en) * | 2009-01-19 | 2009-07-08 | 北京大学 | Passive semi-volatile atmosphere organic pollutant sampling apparatus |
| CN102062711A (en) * | 2010-12-08 | 2011-05-18 | 济南市供排水监测中心 | Organic pollutant enriching device and method for pretreatment of water sample with bulk mass |
Non-Patent Citations (3)
| Title |
|---|
| 刘春立: "环境水样中137Cs过滤浓集法简介", 《辐射防护通讯》 * |
| 夏自强等: "蠕动泵深水采样方法研究", 《黑龙江环境通报》 * |
| 环境保护部: "水质 采样技术指导", 《中华人民共和国国家环境保护标准》 * |
Cited By (16)
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| CN103630432A (en) * | 2012-08-23 | 2014-03-12 | 中国科学院地理科学与资源研究所 | Portable water nitrogen and oxygen isotope filtration and adsorption device and absorption method |
| CN103630432B (en) * | 2012-08-23 | 2015-12-30 | 中国科学院地理科学与资源研究所 | Nitrogen oxygen isotope filtering adsorpting device and adsorption method in a kind of Portable water |
| CN103411794A (en) * | 2013-07-18 | 2013-11-27 | 中国科学院广州地球化学研究所 | Apparatus for acquiring trace quantity of organic pollutants in large volume of seawater, and acquisition system thereof |
| CN103411794B (en) * | 2013-07-18 | 2015-04-22 | 中国科学院广州地球化学研究所 | Apparatus for acquiring trace quantity of organic pollutants in large volume of seawater, and acquisition system thereof |
| CN103674668B (en) * | 2013-12-11 | 2016-08-17 | 南昌航空大学 | Pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass |
| CN103674668A (en) * | 2013-12-11 | 2014-03-26 | 南昌航空大学 | Online pre-separation and enrichment device for pollutants in large-volume water sample |
| CN103645113B (en) * | 2013-12-16 | 2016-08-17 | 山东省城市供排水水质监测中心 | A kind of water causes to smell the method and device of material total amount for measuring |
| CN103645113A (en) * | 2013-12-16 | 2014-03-19 | 山东省城市供排水水质监测中心 | Method and device for determining total quantity of smelly substances in water |
| CN104359719B (en) * | 2014-12-09 | 2017-06-06 | 苏州汉能环保材料科技有限公司 | Volatile organic matter nanometer continuous sampler in a kind of water |
| CN105445061A (en) * | 2016-02-01 | 2016-03-30 | 南京工业职业技术学院 | Active sampling system of persistent organic pollutants PAHs in atmosphere |
| CN105758675A (en) * | 2016-04-26 | 2016-07-13 | 天津市环境保护科学研究院 | Active sampler for water persistent organic pollutants based on suction filtration and preconcentration |
| CN107376488A (en) * | 2017-08-15 | 2017-11-24 | 江苏省环境监测中心 | Suitable for the filtration in-situ system of the water sample containing heavy metal |
| CN107560891A (en) * | 2017-09-05 | 2018-01-09 | 大连民族大学 | The passive sampling apparatus of polar contaminants in a kind of collection water body |
| CN108982711A (en) * | 2018-09-30 | 2018-12-11 | 浙江工业大学 | A kind of draw-out device and its application in grain heap in volatile component detection |
| CN108982711B (en) * | 2018-09-30 | 2023-10-20 | 浙江工业大学 | Extraction device and application thereof in detection of volatile components in grain pile |
| CN111795862A (en) * | 2020-07-14 | 2020-10-20 | 江苏理工学院 | Device and method for sampling dioxin in water with automatic extraction function |
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