CN205679503U - A kind of deformation type diffusive gradients in thin-films device - Google Patents
A kind of deformation type diffusive gradients in thin-films device Download PDFInfo
- Publication number
- CN205679503U CN205679503U CN201620534665.5U CN201620534665U CN205679503U CN 205679503 U CN205679503 U CN 205679503U CN 201620534665 U CN201620534665 U CN 201620534665U CN 205679503 U CN205679503 U CN 205679503U
- Authority
- CN
- China
- Prior art keywords
- base
- block
- film
- film block
- dome
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a kind of deformation type diffusive gradients in thin-films device, described device is made up of base, film block block and film block base；Described base is made up of the dome being coaxially disposed and hollow cylinder superposition, and described dome upper surface offers circular port, and the circular port outer of dome upper surface is fixed in described hollow cylinder bottom surface；Described film block block is the dome that upper surface portion offers circular port, and the external diameter of described film block block is suitable with the internal diameter of base dome；Described film block base is dome, and the height in film block base upper cover face is less than side, and the external diameter of film block base is suitable with the internal diameter of film block block, and the internal diameter of film block base is suitable with the external diameter of base hollow cylinder.Apparatus structure described in the utility model is simple, easy to assembly, has several functions after changing version, and the DGT that can be simultaneously used for water body and soil measures, and when soil DGT measures, this device is simple to operate, and manual operation error is the half of conventional apparatus.
Description
Technical field
This utility model relates to a kind of diffusive gradients in thin-films technique device, particularly to a kind of deformation type diffusive gradients in thin-films
Device.
Background technology
Diffusive gradients in thin-films (Diffusive Gradients in Thin Films, DGT) technology is a kind of new form
Analytical technology, is mainly grown up in the mid-90 in last century by Lancaster university of Britain Davison and Zhang etc..Should
Technology, based on ion diffusion principle, is studied at diffusion and the association process of definition diffusion layer by object ion, it is thus achieved that
Ion activated information in media as well.The device of DGT determination techniques is made up of fixed layer and diffusion layer superposition, and ion is with diffused sheet
Formula passes diffusion layer, immediately fixed layer capture, and forms linear gradient distribution on diffusion layer, and it is near fixing film one end
Ion concentration is maintained zero, contacts the concentration (C of one end with mediumDGT) it is:
In above formula, M is accumulation (the mol cm of ion on fixing film-2), Δ g is thickness of diffusion layer (cm), DgExist for ion
Diffusion rate (cm in diffusion barrier2 s-1), t is diffusion time (s).CDGTBe standing time section analyzed obtain flat by DGT
All concentration (mol L-1)。
DGT diffusion process has comparability with the ion migration in actual environment and bioadsorption processes, and this technology is
As a kind of new morphological analysis means, being gradually applied in water body, soils and sediments research, object of study is from routine
Metallic element expands to yttrium and nonmetalloid etc..
At present DGT device mainly has two classes: (1) piston type.Configuration is similar to piston-shaped, and exposure is circular, for molten
The mensuration of DGT in liquid and soil system；(2) flat.Writing board shape, exposure is rectangle, DGT in sediment
Mensuration.Two kinds of devices, by plastic production, are designed as single use, are provided by DGT company of Britain at present.Piston apparatus exists
During for measuring, live part is only film block, and single use causes the waste of other portion of material；And for soil mass
When system measures, operating comparatively laborious, need to be pressed on certain thickness soil horizon device exposure, pressure and soil thickness are equal
Being difficult to fixing quantity, processing ease causes personal error on request；The most a large amount of pedotheques are in outside exposure,
Therefore the waste of pedotheque can be caused.
Summary of the invention
The purpose of this utility model is to overcome the defect that in prior art, piston type DGT device measures, it is provided that Yi Zhongduo
Deformation type diffusive gradients in thin-films (DGT) device of purposes, described device can be simultaneously used for the mensuration of solution and soil system, and
It is remarkably improved the mensuration performance of DGT in solution and soil system.
For achieving the above object, this utility model adopts the following technical scheme that
A kind of deformation type diffusive gradients in thin-films device, it is characterised in that described device is at the bottom of by base, film block block and film block
Seat composition；Described base is made up of dome and hollow cylinder superposition, and described dome upper surface offers circular port, described open circles
The circular port outer of dome upper surface is fixed in post bottom surface；Described film block block is the dome that upper surface portion offers circular port,
The external diameter of described film block block is suitable with the internal diameter of base dome；Described film block base is dome, the height in film block base upper cover face
Degree is less than side, and the external diameter of film block base is suitable with the internal diameter of film block block, the internal diameter of film block base and base hollow cylinder
External diameter is suitable.
In described device, on module base, capping is sequentially placed fixing film, diffusion barrier and permeable membrane.
Preferably, in described device, the upper surface of described film block block caves inward.
Preferably, described base hollow cylinder lateral surface is provided with groove, and the medial surface of described film block base is provided with convex
Block, the groove on described projection and hollow cylinder lateral surface join with the use of, can position and fix film block base and base.
Preferably, the medial surface of described film block block is provided with groove, described film block chassis outer side face is provided with convex
Block, described projection and the groove fit on film block block medial surface, can position and fix film block base and film block block.
Described film block block is arranged on film block base, and on module base, capping is sequentially placed fixing film, diffusion barrier and oozes
Permeable membrane, film block base forms the module after assembling after fitting with film block block；Module after assembling passes through film block base medial surface
On projection and base hollow cylinder lateral surface on groove fit after, the module after assembling is arranged on base top, is formed
Piston type DGT device.Described piston type DGT device can be used for the DGT of solution/water body and measures.
Described film block block is arranged on film block base, and on module base, capping is sequentially placed fixing film, diffusion barrier and oozes
Permeable membrane, film block base forms the module after assembling after fitting with film block block；Module after assembling is arranged in base dome,
After wherein the block of film block is fitted with base dome, forming cylindrical space and can load soil above film block, the DGT device of formation can
Measure for the DGT of soil.
DGT device described in this utility model fixes recovery or section, the analysis of object and the determination data of film
Process etc., all can realize according to DGT technology in prior art.
Described device measures for DGT, and its using method is as follows:
Solution and water body measure: the module after assembling is arranged on base top, after forming piston type DGT device, and should
Device is put into solution and i.e. be can be used for the mensuration of DGT.After mensuration terminates, take out the fixing film in film block, analyze the mesh on fixing film
Mark thing fixed amount, is calculated by Fick First Law, i.e. can get DGT concentration.
Soil test: the module after assembling is arranged on base bottom, exposure upward, forms cylindrical empty above film block
Between be used for placing pedotheque.The pedotheque handled well is filled up cylindrical space, i.e. can be used for DGT and measure.Mensuration terminates
After, take out the fixing film in film block, analyze the object fixed amount on fixing film, calculated by Fick First Law,
To DGT concentration.
Beneficial effect:
(1) DGT device described in the utility model includes film block base, film block block and base, and it is one that fixing film etc. uses
Secondary property, film block base, block and base can repeatedly use, and therefore can save lot of materials compared with conventional apparatus, simultaneously
Be conducive to transport and the popularization of product.
(2) DGT device described in the utility model is when for soil test, and manual operation error can be reduced to existing dress
The half put, can save at least half of pedotheque usage amount simultaneously.
(3) DGT apparatus structure described in the utility model is simple, easy to assembly, has several functions after changing version,
And the mensuration of object in the surrounding mediums such as solution/water body, soil can be simultaneously used for, can be used for phosphorus in surrounding medium, with much money
Genus, the A+E of the migratory activity of metalloid, biological effectiveness, pollution risk etc..
Accompanying drawing explanation
Fig. 1 is the structural representation of DGT device pedestal.
Fig. 2 (A) is the structural representation of DGT device film block base；Fig. 2 (B) is the upward view of DGT device film block base；
Fig. 2 (C) is the structural representation of DGT device film block block.
Fig. 3 (A) is the scheme of installation of the DGT device for solution/water body measurement；Fig. 3 (B) is for solution/water body
Measure DGT device be completed after structural representation.
Fig. 4 (A) is the scheme of installation of the DGT device measured for soil system；Fig. 4 (B) is to survey for soil system
Fixed DGT device be completed after structural representation.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the specific implementation of deformation type diffusive gradients in thin-films device of the present utility model is retouched
State, in figure, 1 be base, 2 be film block block, 3 be film block base, 4 be base dome, 5 be hollow cylinder, 6 be circular hole, 7 for recessed
Groove, 8 be vertical dimpled grain, 9 be groove, 10 be projection, 11 be projection, 12 for upper capping.It should be noted that below example
Not in order to limit protection domain of the present utility model, those skilled in the art can in objective of the present utility model and scope,
Carrying out being equal to or the amendment of equivalence, replace or convert, protection domain of the present utility model is defined by the claims appended hereto.
Embodiment 1
A kind of deformation type diffusive gradients in thin-films device, described device is made up of base 1, film block block 2 and film block base 3.
The hollow cylinder 5 of dome 4 and Coaxial Superimposed that described base 1 is had circular port by upper surface portion forms, described hollow cylinder 5
It is fixed on the circular port outer of base dome 4 upper surface；Described dome 4 side is provided with circular hole 6, the open circles of described base 1
Post 5 lateral surface is provided with two " L " connected in stars 7 relative to position.Described film block block 2 has the circle of circular port for upper surface portion
Covering, and upper surface caves inward, the external diameter of described film block block 2 is suitable with the internal diameter of dome 4；Described film block block 2 lateral surface
Being provided with vertical dimpled grain 8, medial surface is provided with two grooves 9 relative to position.Described film block base 3 is dome, at the bottom of described film block
Upper capping 12 height of seat 3 is less than side, and the external diameter of film block base 3 is suitable with the internal diameter of film block block 2, film block base 3 interior
Footpath is suitable with the external diameter of base 1 hollow cylinder 5.Described film block base 3 lateral surface is provided with two projections 10 relative to position, described
The groove 9 of projection 10 and film block block 2 medial surface with the use of；Described film block base 3 medial surface is provided with two relative to position
Rectangular bar shaped projection 11, " L " connected in star 7 of described bar shaped projection 11 and base 1 hollow cylinder 5 lateral surface with the use of,
Fixing film block base 3 and base 1.
It is internal that described film block base 3 is installed on film block block 2, film block base 3 has been sequentially overlapped on capping 12 fixing film,
Inside diffusion barrier, permeable membrane, with film block block 2 upper surface after laminating, form the module after assembling；Module after assembling is passed through
The bar shaped projection 11 of film block base 3 inner surface and " L " connected in star 7 of base 1 hollow cylinder 5 lateral surface with the use of, will assemble
After module be arranged on base 1 top, form piston type DGT device.Described piston type DGT device can be used for the survey of solution system
Fixed.
It is internal that described film block base 3 is installed on film block block 2, film block base 3 has been sequentially overlapped on capping 12 fixing film,
Inside diffusion barrier, permeable membrane, with film block block 2 upper surface after laminating, form the module after assembling；Module after assembling is installed
In base dome 4, wherein fit inside film block block 2 upper surface and base dome 4 upper surface.Formed above film block base 3
After cylindrical space, the DGT device of formation can be used for the mensuration of soil system.
Embodiment 2
DGT with soil available phosphorus analyzes as example below, is described further device of the present utility model.
Fixing film uses with zirconium dioxide as adsorbent, by acrylamide, Zirconium dioxide powder is made gel film,
Prepared by the method specifically disclosed according to Chinese invention patent CN200910183047.5.
Put in DGT film block base after Zr-oxide is fixed film, agarose diffusion barrier and filter membrane (permeable membrane) superposition, will
After film block base seals, after adding film block block, load base bottom, in film block top cylindrical is hollow, fill out pedotheque, survey
After determining 24h, remove Zr-oxide film, the phosphorus of accumulation on extraction and analysis Zr-oxide film, calculated by Fick the first diffusion law
Obtain DGT concentration, be the content of soil available phosphorus.
Specifically, described method comprises the following steps:
Step (1) pedotheque prepares: weighs the appropriate soil sample that air-dries and puts in plastic cup, adds maximum field capacity
(MWHC) 40% water stirs, and places 48h, then add water and stir to the 80% of MWHC, treat at 25 DEG C
At 25 DEG C, 24h is balanced (in conjunction with range estimation regulation water content) when uniform light and stirring leicht fallen D/A occurs in soil surface.
Step (2) film block base assembles: Zr-oxide fixes film, agarose diffusion barrier and filter membrane (permeable membrane) and folds successively
Add and put in module, seal；
Step (3) soil test: after module is loaded film block block, then be placed in base bottom, film block base exposure court
Upper prepared DGT device.The pedotheque handled well is filled up the cylindrical space above film block base, at room temperature places 24h,
Record indoor temperature simultaneously.
Step (4) Zr-oxide film reclaims: after being taken out by DGT device, open permeable membrane and diffusion barrier successively, by Zr-
After oxide film deionized water rinsing, put in preprepared 2ml centrifuge tube.
Step (5) phosphorus extracts: add 1.8ml 1M NaOH aqueous solution, left at room temperature 24h in centrifuge tube.
Step (6) phosphorus measures: draw the solution of 0.1ml from each centrifuge tube of step (5), after appropriate dilution,
Molybdenum blue colorimetric method is used to measure the phosphorus concentration in extracting solution；
Phosphorus accumulation (M) conversion on Zr-oxide film: calculate according to below equation,
Wherein CeIt is the concentration of phosphorus, V in extracting solutioneIt is extracting liquid volume (after dilution), VgIt it is Zr-oxide membrane volume
(0.2ml), feIt it is the extraction ratio of phosphorus.
DGT concentration conversion: calculate according to Fick First Law,
In above formula, Δ g is diffusion barrier thickness (0.090cm)；DgFor phosphate anion diffusion coefficient in diffusion barrier)；A
For DGT device exposed area (3.14cm2)；T is standing time (345600 seconds), CDGTFor the concentration of available phosphorus, unit is μ g/
L。
Embodiment 3
According to method similar to Example 2, this utility model device is used to measure the DGT accumulation of effectively arsenic in soil
Amount, and compare with existing piston type DGT device.Table 1 is that 6 different people are according to existing device and dress described in the utility model
The DGT measurement result of the operating process put arsenic effective to a certain soil, everyone do 4 parallel.It can be seen that two kinds of devices are surveyed
The fixed meansigma methods obtained does not has a significant difference, but evaluated error (relative standard deviation) obvious difference, 6 people behaviour of existing device
The error made is 1.84%-7.52%, and this device is 0.63%-4.22%；Total error is respectively 4.52% and 2.26%, this dress
The total error put is the half of existing device.
16 different people of table are effective to a certain soil according to the operating process of existing device and device described in the utility model
The DGT measurement result of arsenic
Claims (7)
1. a deformation type diffusive gradients in thin-films device, it is characterised in that described device is by base (1), film block block (2) and film
Block base (3) forms；Described base (1) is made up of dome (4) and hollow cylinder (5) superposition, and described dome (4) upper surface is opened
If circular port, the circular port outer of dome (4) upper surface is fixed in described hollow cylinder (5) bottom surface；Described film block block (2) is
Upper surface portion offers the dome of circular port, and the external diameter of described film block block (2) is suitable with the internal diameter of base dome (4)；Described
Film block base (3) is dome, and the height of the upper capping (12) of film block base (3) is less than side, the external diameter of film block base (3) and film block
The internal diameter of block (2) is suitable, and the internal diameter of module base (3) is suitable with the external diameter of base (1) hollow cylinder (5).
A kind of deformation type diffusive gradients in thin-films device the most according to claim 1, it is characterised in that described module base
(3) upper capping (12) is sequentially placed fixing film, diffusion barrier and permeable membrane.
A kind of deformation type diffusive gradients in thin-films device the most according to claim 1, it is characterised in that in described device,
The upper surface of described film block block (2) caves inward.
A kind of deformation type diffusive gradients in thin-films device the most according to claim 1, it is characterised in that described film block block
(2) it is provided with groove (9) on medial surface, described film block base (3) lateral surface is provided with projection (10), described projection (10)
Coordinate with the groove (9) on film block block (2) medial surface, position and fix film block base (3) and film block block (2).
A kind of deformation type diffusive gradients in thin-films device the most according to claim 4, it is characterised in that described film block block
(2) being arranged on film block base (3), the upper capping (12) of module base (3) is sequentially placed fixing film, diffusion barrier and permeable membrane, film
Block base (3) forms the module after assembling after fitting with film block block (2)；Module after assembling is arranged on the circle of base (1)
In lid (4), dome (4) laminating of film block block (2) and base (1).
6. according to a kind of deformation type diffusive gradients in thin-films device described in claim 1 or 4, it is characterised in that described base (1)
Hollow cylinder (5) lateral surface is provided with groove (7), and the medial surface of described film block base (3) is provided with projection (11), described projection
(11) coordinate with the groove (7) on hollow cylinder (5) lateral surface, position and fix film block base (3) and base (1).
A kind of deformation type diffusive gradients in thin-films device the most according to claim 6, it is characterised in that described film block block
(2) being arranged on film block base (3), the upper capping (12) of module base (3) is sequentially placed fixing film, diffusion barrier and permeable membrane, film
Block base (3) forms the module after assembling after fitting with film block block (2)；Module after assembling is by film block base (3) inner side
Projection (11) on face coordinates with the groove (7) of base (1) hollow cylinder (5) lateral surface, and the module after assembling is arranged on the end
Seat (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620534665.5U CN205679503U (en) | 2016-06-02 | 2016-06-02 | A kind of deformation type diffusive gradients in thin-films device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620534665.5U CN205679503U (en) | 2016-06-02 | 2016-06-02 | A kind of deformation type diffusive gradients in thin-films device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679503U true CN205679503U (en) | 2016-11-09 |
Family
ID=57434360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620534665.5U Active CN205679503U (en) | 2016-06-02 | 2016-06-02 | A kind of deformation type diffusive gradients in thin-films device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205679503U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422102A (en) * | 2017-09-12 | 2017-12-01 | 天津天润益康环保科技有限公司 | A kind of DGT shells that can be used for content of beary metal at detection soil different depth |
| US10514371B2 (en) | 2017-11-01 | 2019-12-24 | Savannah River Nuclear Solutions, Llc | Reactive diffusive gradient in thin-film sampler and mercury speciation by use of same |
| CN110988103A (en) * | 2019-12-13 | 2020-04-10 | 生态环境部华南环境科学研究所 | Microporous gradient diffusion film device and application thereof |
| US11319225B2 (en) | 2018-10-24 | 2022-05-03 | Savannah River Nuclear Solutions, Llc | Modular system and method for mercury speciation in a fluid sample |
-
2016
- 2016-06-02 CN CN201620534665.5U patent/CN205679503U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422102A (en) * | 2017-09-12 | 2017-12-01 | 天津天润益康环保科技有限公司 | A kind of DGT shells that can be used for content of beary metal at detection soil different depth |
| US10514371B2 (en) | 2017-11-01 | 2019-12-24 | Savannah River Nuclear Solutions, Llc | Reactive diffusive gradient in thin-film sampler and mercury speciation by use of same |
| US11319225B2 (en) | 2018-10-24 | 2022-05-03 | Savannah River Nuclear Solutions, Llc | Modular system and method for mercury speciation in a fluid sample |
| CN110988103A (en) * | 2019-12-13 | 2020-04-10 | 生态环境部华南环境科学研究所 | Microporous gradient diffusion film device and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205679503U (en) | A kind of deformation type diffusive gradients in thin-films device | |
| US20210208033A1 (en) | Diffusive gradients in thin films (dgt) test device for lake water and test method using same | |
| CN103743655B (en) | Method for determining inorganic arsenic in soil or water body based on diffusive gradients in thin-films technique | |
| US6595036B1 (en) | Method and apparatus for measuring amount of gas adsorption | |
| CN110426336A (en) | A kind of subgrade soils Unsaturated Hydraulic Conductivity measuring system and its relevant measurement method | |
| CN102928389B (en) | Device for quickly detecting impregnation amount in real time and using method thereof | |
| CN102902860A (en) | Workplace occupational exposure simulation analysis method based on computational fluid dynamics (CFD) technology | |
| CN105784415A (en) | Passive sampler for high-resolution determination of freely dissolved pollutant concentration of pore water | |
| CN106053288A (en) | Apparatus for measuring gas volatilizing flux of soil by adopting spherical passive sampler, and method thereof | |
| CN107402145A (en) | A kind of air sampling container and the method for sampling | |
| CN108459121A (en) | A kind of micropore diffusion film apparatus and application thereof | |
| CN101446539B (en) | Diffusion balance device for acquiring interstitial water of sediment in situ and method thereof | |
| CN102980843A (en) | Method for detecting coke air hole characteristics | |
| CN110426477A (en) | The simulator of Zero-valent Iron hydrodynamic seepage pressure | |
| CN110763776B (en) | LC-HG-AFS detection method of thioarsenate | |
| CN106501492B (en) | A method of it reducing static box method and measures farmland ammonia volatilization spatial variability and environmental perturbation error | |
| CN111175094A (en) | Low-permeability site soil air headspace acquisition device, acquisition method and application thereof | |
| Zhang et al. | New in-situ procedures for measuring trace metals in pore waters | |
| CN206594002U (en) | A kind of hydrogen storage material, which is inhaled, puts hydrogen PCT curve testing devices | |
| CN207164047U (en) | A kind of DGT shells that can be used for content of beary metal at detection soil different depth | |
| CN211740771U (en) | Low-permeability site soil air headspace acquisition device and detection system | |
| Geistlinger et al. | Evaporation Study for Real Soils Based on HYPROP Hydraulic Functions and Micro‐CT‐Measured Pore‐Size Distribution | |
| CN212328377U (en) | Sewage detection that leakproofness is good holds box | |
| GB2499727A (en) | Chip calorimeter for determining the effect of nanoparticle materials on living cells | |
| CN206057302U (en) | A kind of miniature COD on-line measuring devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |