CN107569889A - On Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles - Google Patents
On Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles Download PDFInfo
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- CN107569889A CN107569889A CN201710948159.XA CN201710948159A CN107569889A CN 107569889 A CN107569889 A CN 107569889A CN 201710948159 A CN201710948159 A CN 201710948159A CN 107569889 A CN107569889 A CN 107569889A
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- filter bowl
- water sample
- bowl
- filter
- cryptosporidium
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- 238000001914 filtration Methods 0.000 title claims abstract description 31
- 241000223935 Cryptosporidium Species 0.000 title claims abstract description 29
- 241000224467 Giardia intestinalis Species 0.000 title claims abstract description 28
- 229940085435 giardia lamblia Drugs 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000003651 drinking water Substances 0.000 abstract description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000009781 safety test method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 208000015181 infectious disease Diseases 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000007918 pathogenicity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The present invention relates to public drinking water hygiene safety testing field, to overcome the problem of existing cumbersome to two worm detection means detection program, testing cost is high, there is provided includes left filter component, right filter component and filter core on Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles, wherein retracting device；Left filter component includes water sample bucket, water sample peristaltic pump, left filter bowl and elutriation liquid collecting vessel；Set at the top of left filter bowl into water sample hole and left filter bowl steam vent, its bottom is provided with row and eluriates fluid apertures；Right filter component includes eluriating liquid bucket, eluriates liquid peristaltic pump, right filter bowl and water sample collecting vessel；Being set at the top of right filter bowl into elutriation fluid apertures, right filter bowl steam vent, bottom sets water sample to collect hole；Above-mentioned hole is respectively provided with magnetic valve；Filter core is installed between left filter bowl and right filter bowl；The aperture of filter core filter paper is less than the appearance and size of two worms.
Description
Technical field
The present invention relates to public water hygiene safety detection technology field, and in particular on Cryptosporidium and Jia whips
The filtering recovering device of caterpillar.
Background technology
Cryptosporidium and giardia lamblia stiles are (referred to as " two worms ") that two kinds of pathogenicities for seriously endangering water quality safeties are primary dynamic
Thing.Cryptosporidium and giardia lamblia stiles in water-supply systems directly threaten drinking water safety, while to Urban Water Environment band
Carry out ecological and health risk.The giardia lamblia stiles dosage that causes a disease be 10~100 sporangiocysts living, the pathogenic dosage of Cryptosporidium is only 1~
10 egg capsules living.Without special clinical symptoms, without prevention vaccine, most antibiotic after Cryptosporidium or giardia lamblia stiles infection
Invalid, treatment relies on human body itself resistance.
At present, Cryptosporidium, the spore of giardia lamblia stiles or egg capsule turn into the maximal infection source, but its by water infection
Resistance is produced to the cholorination in traditional method for treating water.Most of use for laboratory Cryptosporidium and giardia lamblia stiles detection
Device detection program is cumbersome, with high costs, it is difficult to carry out detection extensively.Therefore, to ensure drinking water safety, a kind of operation is needed badly
" two worms " detection means easy, testing cost is low.
The content of the invention
The purpose of the present invention be overcome existing Cryptosporidium and giardia lamblia stiles detection means detect program is cumbersome, detection into
The problem of this is high, and provide on Cryptosporidium and the filtering recovering device of giardia lamblia stiles.
To achieve the above object, technical scheme provided by the invention is：Filtering on Cryptosporidium and giardia lamblia stiles
Retracting device, it is characterized in that, including left filter component, right filter component and filter core；The left filter component includes water sample bucket, water
Sample peristaltic pump, left filter bowl and elutriation liquid collecting vessel, the left filter bowl are the containers that side is circular open ends；The left filter bowl
Top is set into water sample hole and left filter bowl steam vent, and its bottom is provided with row and eluriates fluid apertures；Described in the water sample peristaltic pump is drawn
Enter described in water sample warp in water sample bucket in water sample hole to left filter bowl；The elutriation liquid collecting vessel is used to reclaim eluriates liquid through the row
The elutriation liquid of hole discharge；The right filter component includes eluriating liquid bucket, eluriates liquid peristaltic pump, right filter bowl and water sample collecting vessel；It is described
Right filter bowl is the container that side is circular open ends；The top of the right filter bowl is set into elutriation fluid apertures, right filter bowl steam vent, bottom
Portion sets water sample to collect hole；Described eluriate enters to eluriate fluid apertures extremely described in the liquid peristaltic pump absorption elutriation liquid warp eluriated in liquid bucket
In right filter bowl；The water sample collecting vessel is used to reclaim the water sample for collecting hole discharge through the water sample；Water inlet on the left filter bowl
Enter to eluriate fluid apertures, right filter bowl steam vent, the water sample that sample hole, left filter bowl steam vent, row are eluriated on fluid apertures and the right filter bowl are received
Collection hole is respectively provided with magnetic valve；The openend and the openend of right filter bowl of the left filter bowl are detachably connected, and the filter core is installed in
Between the left filter bowl and the right filter bowl；The filter paper aperture size of the filter core is less than the outer of Cryptosporidium and giardia lamblia stiles
Shape size.
Further, above-mentioned filter paper aperture is 0.4~1.2 μm.
Further, above-mentioned filter paper is at least a piece of.
Further, above-mentioned filter core includes the top board and lower platen using pin connection, the top board and lower platen it
Between the filter paper is set, and the top board is brought into close contact with lower platen and compresses the filter paper；The top board and lower platen are equal
It is more than the circular substrate of the left filter bowl opening diameter for diameter, its middle part is respectively provided with some through holes.
Further, the openend of above-mentioned right filter bowl sets annular groove；The filter core is nested in the annular groove,
The openend of the left filter bowl is provided with the ring-shaped step corresponding with the annular groove.
Further, it is reverse frustoconic groove in the middle part of above-mentioned top board, the through hole is located at the bottom of the reverse frustoconic groove
Face, the lower platen are arranged at the openend side of the right filter bowl.
Further, in order to make full use of elutriation liquid, basal diameter and the right side of the reverse frustoconic groove of above-mentioned top board
The opening diameter of filter bowl is identical.In order to make full use of elutriation liquid so that eluriate liquid and be entirely used for eluting " two worms " as far as possible, it is above-mentioned
The opening diameter of left filter bowl is more than the opening diameter of the right filter bowl.
Further, in order to prevent in left filter bowl and right filter bowl liquid to occur cross pollution, above-mentioned top board outward flange with
Sealing ring is set between filter paper；The openend of the left filter bowl and the openend of right filter bowl set close between the filter core respectively
Seal.
Further, in order to save experimental operation space, in addition to the support provided with base, the filtering recovering device are put
Put on the bracket；And it can be moved on support；The top board and lower platen are stainless steel；Left filter bowl and the right side
Filter bowl is plastic material；The left filter bowl is used with right filter bowl and is threadedly coupled.
On Cryptosporidium and the filtering recovering system of giardia lamblia stiles, including above-mentioned filtering recovering device；Also include control
Device processed, control device electrically connects with above-mentioned water sample peristaltic pump, elutriation liquid peristaltic pump and magnetic valve, and controls the magnetic valve
Switch and the water sample peristaltic pump and the start and stop for eluriating liquid peristaltic pump.
Automatic fitration provided by the invention and recovery system can be applied to including other microorganisms in " two worms " and water
Collect and reclaim, and its testing cost once is cheap, is especially suitable for popularization and application.
The beneficial effects of the invention are as follows：
1st, the present invention is filtered using filter paper, and filter paper aperture is 0.4~1.2 μm, much smaller than two worm sizes, can effectively be filtered
Cryptosporidium and giardia lamblia stiles in water.Refined filtration processing can also be carried out to water sample by increasing the method for multi-layer filter paper, with
Realize the purification to water sample.
2nd, installing/dismounting of the present invention is easy, facilitates portable.It is in particular in：Left filter bowl and right filter bowl are plastic material foreign side
Inner circle structure, and filter element upper pressure plate and lower platen are coupled by pin, are easy for installation and removal.
Left filter bowl and right filter bowl compressive resistance are high, and its square profiles is easily installed and placed, and there is preferable place to be applicable
Property.
3rd, operating efficiency of the present invention is high.Under control of the control means, filtering and reclaimer operation are integral type stepped ordering
Carry out, overall process without it is manually operated, filter core need not be removed, it is convenient and swift, substantially increase operating efficiency.
4th, it is reverse frustoconic groove in the middle part of top board, its basal diameter is identical with the opening diameter of the right filter bowl.Push
Plate is arranged at the openend side of the right filter bowl.
In filter process, the design of inverted round stage causes intake tunnel to narrow from the width, and helps to increase water feeding pressure, makes water
Sample faster by filter core, increases the rate of filtration.
In the backwash process of recovery, the design of inverted round stage make it that backwash passage is broadened by narrow, is eluriated liquid stream and is gone out filter
Pressure diminishes rapidly after core, it is ensured that two worms discharge rapidly left filter bowl after being rinsed, so as to eliminate due to being filtered during backwash
The undesirable influence of backwash effect caused by core both sides pressure difference is too small.
5th, the peristaltic pump that the present invention uses to water sample and eluriates liquid offer power, and it can adjust power output, and wriggle
Pump control device control under can to water sample and eluriate liquid realize accurate measurement, can effectively anti-locking apparatus internal liquid overflow
Go out.
Brief description of the drawings
Fig. 1 is the structural representation of automatic fitration and recovery system；
Fig. 2 is in Fig. 1 local I enlarged drawing；
Fig. 3 is the structural representation of filter core in Fig. 1；
Fig. 4 is the top view of top board in Fig. 3.
Each label is described as follows in figure：
1-left filter component；11-water sample bucket, 12-water sample peristaltic pump, 13-left filter bowl, 131-enter water sample hole, 132-
Left filter bowl steam vent, 133-row eluriate fluid apertures；14-eluriate liquid collecting vessel；
2-right filter component；21-eluriate liquid bucket, 22-eluriate liquid peristaltic pump, 23-right filter bowl, 231-enter to eluriate fluid apertures,
232-right filter bowl steam vent, 233-water sample collect hole, 24-water sample collecting vessel；
3-filter core；31-top board, 32-filter paper, 33-lower platen；34-through hole.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and examples.
On Cryptosporidium and the filtering recovering device of giardia lamblia stiles, including filtering recovering device, control device and set
There is the support of base；Filtering recovering device is placed on support and can moved on support.Filtering recovering device as shown in Figure 1
Including left filter component 1, right filter component 2 and filter core 3.
Left filter component 1 includes water sample bucket 11, water sample peristaltic pump 12, left filter bowl 13 and eluriates liquid collecting vessel 14, left filter bowl 13
It is the container that side is circular open ends；The top of left filter bowl 13 is set into water sample hole 131 and left filter bowl steam vent 132, its bottom
Portion is provided with row and eluriates fluid apertures 133；Water sample in the absorption water sample of water sample peristaltic pump 12 bucket 11 is through entering water sample hole 131 to left filter bowl 13
It is interior；Liquid collecting vessel 14 is eluriated to be used to reclaim the elutriation liquid eluriated fluid apertures 133 through row and discharged.
Right filter component 2 includes eluriating liquid bucket 21, eluriates liquid peristaltic pump 22, right filter bowl 23 and water sample collecting vessel 24；Right filter bowl
23 be the container that side is circular open ends；The right top of filter bowl 23 is set into elutriation fluid apertures 231, right filter bowl steam vent 232, bottom
Water sample is set to collect hole 233；The elutriation liquid in the absorption elutriation liquid of liquid peristaltic pump 22 bucket 21 is eluriated through entering to eluriate fluid apertures 231 to right filter
In cup 23；Water sample collecting vessel 24 is used to reclaim the water sample collected hole 233 through water sample and discharged.The left opening diameter of filter bowl 13 is more than right filter
23 opening diameters of cup.
As shown in Figure 2, Figure 3, Figure 4, filter core 3 includes the top board 31 and lower platen 33 using pin connection, the He of top board 31
Lower platen 33 is stainless steel；Filter paper 32 is set between top board 31 and lower platen 33, and filter paper 32 is a piece of, its aperture chi
Very little is 0.4~1.2 μm, the appearance and size less than Cryptosporidium and giardia lamblia stiles；Top board 31 closely pastes with lower platen 33
The tight filter paper 32 of combined pressure；Sealing ring is set between the outward flange of top board 31 and filter paper 32；Top board 31 and lower platen 33 are diameter
More than the circular substrate of the left opening diameter of filter bowl 13, its middle part is respectively provided with some through holes 34.The middle part of top board 31 is inverted round stage
Shape groove, through hole 34 are located at the bottom surface of reverse frustoconic groove, the basal diameter of reverse frustoconic groove and the opening for right filter bowl 23 of top board 31
Mouth diameter is identical.
Filter core 3 is installed between left filter bowl 13 and right filter bowl 23.The openend of right filter bowl 23 sets annular groove；Filter core 3
It is nested in annular groove, the lower platen 33 of filter core 3 is arranged at the openend side of right filter bowl 23；The openend of left filter bowl 13 is set
It is equipped with the ring-shaped step corresponding with annular groove.Left filter bowl 13 and right filter bowl 23 are plastic material；The openend of left filter bowl 13
Use and be threadedly coupled with the openend of right filter bowl 23, and sealing ring is set between filter core 3 respectively.
Entering on water sample hole 131, left filter bowl steam vent 132, row's elutriation fluid apertures 133 and right filter bowl 23 on left filter bowl 13
Enter to eluriate fluid apertures 231, right filter bowl steam vent 232, water sample and collect hole 233 to be respectively provided with magnetic valve for control hole open and close.
Control device electrically connects with water sample peristaltic pump 12, elutriation liquid peristaltic pump 22 and magnetic valve and controls the switch of magnetic valve
And water sample peristaltic pump 12 and the start and stop for eluriating liquid peristaltic pump 22.Control device of the present invention, can be according to real work need
Will, designed and realized using conventional control.
When filtering recovering device is installed, the filter core 3 assembled is put into the annular groove of the right openend of filter bowl 23 setting,
Left filter bowl 13 is screwed in into right filter bowl 23 again.
The course of work of the present invention：
In filtration stage, under control device control, enter water sample hole 131 and water sample is collected hole 233 and opened, remaining Kong Weiguan
Closed state.Water sample peristaltic pump 12 is opened, and water sample enters left filter bowl 13 by water storage sample bucket 11, enters right filter bowl after the filtering of filter core 3
23, finally enter water sample collecting vessel 24.
When water sample collects hole 233, and blocking or magnetic valve transmission failure occurs, right filter bowl steam vent 232 is opened, makes right filter
Cup 23 and atmosphere, hole 233 or maintenance magnetic valve are collected so as to clear up dredging water sample.
In recovery stage, under control device control, left filter bowl steam vent 132 is opened, and remaining hole is closed mode.Wash in a pan
Washing lotion peristaltic pump 22 is opened, and is eluriated liquid and is eluriated liquid bucket 21 into right filter bowl 23 by storage；After eluriating liquid and being full of the right inner chamber of filter bowl 23,
Left filter bowl 13 also enters a part and eluriates liquid, closes left filter bowl steam vent 132, and the row of opening eluriates fluid apertures 133, eluriates liquid peristaltic pump
22 continue to run with, and eluriate liquid and enter left filter bowl 13 through filter core 3 by right filter bowl 23, finally enter and eluriate liquid collecting vessel 14.
Claims (10)
1. on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Including left filter component (1), right filter
Component (2) and filter core (3)；
The left filter component (1) includes water sample bucket (11), water sample peristaltic pump (12), left filter bowl (13) and eluriates liquid collecting vessel
(14),
The left filter bowl (13) is the container that side is circular open ends；The top of the left filter bowl (13) is set into water sample hole
(131) it is provided with row with left filter bowl steam vent (132), its bottom and eluriates fluid apertures (133)；
The water sample peristaltic pump (12) is drawn enters water sample hole (131) to left filter bowl described in the water sample warp in the water sample bucket (11)
(13) in；The liquid collecting vessel (14) of eluriating is used to reclaim the elutriation liquid for eluriating fluid apertures (133) discharge through the row；
The right filter component (2) includes eluriating liquid bucket (21), eluriates liquid peristaltic pump (22), right filter bowl (23) and water sample collecting vessel
(24)；
The right filter bowl (23) is the container that side is circular open ends；The top of the right filter bowl (23) is set into elutriation fluid apertures
(231), right filter bowl steam vent (232), bottom set water sample to collect hole (233)；
Described eluriate enters to eluriate fluid apertures (231) extremely described in liquid peristaltic pump (22) the absorption elutriation liquid warp eluriated in liquid bucket (21)
In right filter bowl (23)；The water sample collecting vessel (24) is used to reclaim the water sample for collecting hole (233) discharge through the water sample；
On the left filter bowl (13) enter water sample hole (131), left filter bowl steam vent (132), row eluriate fluid apertures (133) and described
On right filter bowl (23) enter to eluriate fluid apertures (231), right filter bowl steam vent (232), water sample collect hole (233) be respectively provided with magnetic valve；
The openend and the openend of right filter bowl (23) of the left filter bowl (13) are detachably connected, and the filter core (3) is installed in institute
State between left filter bowl (13) and the right filter bowl (23)；Filter paper (32) aperture size of the filter core (3) be less than Cryptosporidium and
The appearance and size of giardia lamblia stiles.
It is 2. according to claim 1 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Institute
Filter paper (32) aperture is stated as 0.4~1.2 μm.
It is 3. according to claim 2 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Institute
It is at least a piece of to state filter paper (32).
4. existing on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, its feature according to Claims 2 or 3
In：The filter core (3) includes the top board (31) and lower platen (33) using pin connection,
The filter paper (32), and the top board (31) and lower platen are set between the top board (31) and lower platen (33)
(33) it is brought into close contact and compresses the filter paper (32)；
The top board (31) and the circular substrate that lower platen (33) is that diameter is more than left filter bowl (13) opening diameter, its
Middle part is respectively provided with some through holes (34).
It is 5. according to claim 4 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Institute
The openend for stating right filter bowl (23) sets annular groove；The filter core (3) is nested in the annular groove, the left filter bowl
(13) openend is provided with the ring-shaped step corresponding with the annular groove.
It is 6. according to claim 5 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：
It is reverse frustoconic groove in the middle part of the top board (31), the through hole (34) is located at the bottom surface of the reverse frustoconic groove, institute
State the openend side that lower platen (33) is arranged at the right filter bowl (23).
It is 7. according to claim 6 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Institute
The basal diameter for stating the reverse frustoconic groove of top board (31) is identical with the opening diameter of the right filter bowl (23)；
The opening diameter of the left filter bowl (13) is more than the opening diameter of the right filter bowl (23).
It is 8. according to claim 7 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Institute
State and sealing ring is set between top board (31) outward flange and filter paper (32)；
The openend of the left filter bowl (13) and the openend of right filter bowl (23) set sealing between the filter core (3) respectively
Circle.
It is 9. according to claim 8 on Cryptosporidium and the filtering recovering device of giardia lamblia stiles, it is characterised in that：Also
Including the support provided with base, the filtering recovering device is placed on the bracket；
The top board (31) and lower platen (33) are stainless steel；Left filter bowl (13) and right filter bowl (23) are plastic material；
The left filter bowl (13) uses with right filter bowl (23) and is threadedly coupled.
10. on Cryptosporidium and the filtering recovering system of giardia lamblia stiles, it is characterised in that：It is any including claim 1 to 9
Described filtering recovering device；
Also include control device, the control device and the water sample peristaltic pump (12), elutriation liquid peristaltic pump (22) and the electricity
Magnet valve electrically connects, and controls the switch of the magnetic valve and the water sample peristaltic pump (12) and elutriation liquid peristaltic pump (22) to open
Stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948159.XA CN107569889A (en) | 2017-10-12 | 2017-10-12 | On Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948159.XA CN107569889A (en) | 2017-10-12 | 2017-10-12 | On Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles |
Publications (1)
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|---|---|
| CN107569889A true CN107569889A (en) | 2018-01-12 |
Family
ID=61037298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710948159.XA Pending CN107569889A (en) | 2017-10-12 | 2017-10-12 | On Cryptosporidium and the filtering recovering device and its system of giardia lamblia stiles |
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| CN108913544A (en) * | 2018-08-02 | 2018-11-30 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Pathogenic microorganism efficiently concentrating device and its enrichment method in a kind of water environment |
| CN111103416A (en) * | 2019-12-30 | 2020-05-05 | 重庆商勤科技有限公司 | Water source pollution early warning method and system |
| CN112129608A (en) * | 2020-10-10 | 2020-12-25 | 奎泰斯特(上海)科技有限公司 | Water filtering and elutriating method |
| CN112161852A (en) * | 2020-10-10 | 2021-01-01 | 奎泰斯特(上海)科技有限公司 | Water quality filtering and elutriating system |
| CN113324801A (en) * | 2021-05-29 | 2021-08-31 | 林孔亮 | Sampler for detecting content of two insects in water and sampling method thereof |
| CN113667579A (en) * | 2021-07-29 | 2021-11-19 | 段效辉 | Water sample collection device and collection method based on digital PCR quantitative detection technology of giardia and cryptosporidium in water |
| CN108579155B (en) * | 2018-07-06 | 2024-04-23 | 中国疾病预防控制中心环境与健康相关产品安全所 | Filter device for dyeing two insects |
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