DGT probe and sediment/water interface micro-area detection method using same

A determination method and sediment technology, applied in the direction of surface/boundary effect, measurement device, instrument, etc., can solve the problem of inability to realize the determination of phosphorus, sulfur and metal three elements

Inactive Publication Date: 2014-11-19
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the DGT probes in the prior art are only used to measure one element, but cannot realize the determination of phosph

Method used

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  • DGT probe and sediment/water interface micro-area detection method using same
  • DGT probe and sediment/water interface micro-area detection method using same
  • DGT probe and sediment/water interface micro-area detection method using same

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The three-layer immobilized gel DGT probe described in this example is as follows figure 1 and figure 2 As shown, it includes a connected substrate 7, a hydrated iron oxide fixing glue 6, a silver iodide fixing glue 5, a Chelex100 fixing glue 4, a diffusion glue 3, a filter membrane 2 and a cover plate 1 with a window 8, wherein the diffusion glue 3 The thickness of the filter membrane 2 is 0.14mm, the thickness of the hydrated iron oxide fixing glue 6 is 0.40mm, the thickness of the silver iodide fixing glue 5 is 0.60mm, and the thickness of the Chelex100 fixing glue 4 is 0.40mm.

[0049] Correspondingly, the thickness of the diffusion layer of the DGT probe described in this embodiment for phosphorus is: filter membrane 2+diffusion glue 3+Chelex-100 fixing glue+silver iodide fixing glue 5=1.53mm; the thickness of the diffusion layer for sulfur is : filter membrane 2+diffusion glue 3+Chelex-100 fixing glue=0.93mm; the thickness of the diffusion layer for metal is: fi...

Embodiment 2

[0052] The three-layer fixing gel DGT probe described in this embodiment includes a substrate 7 for connection, a hydrated iron oxide fixing glue 6, a Chelex100 fixing glue 4, a silver iodide fixing glue 5, a diffusion glue 3, a filter membrane 2 and a The cover plate 1 of 8, wherein the thickness of the diffusion glue 3 is 0.39mm, the thickness of the filter membrane 2 is 0.14mm, the thickness of the hydrated iron oxide fixing glue 6 is 0.40mm, the thickness of the silver iodide fixing glue 5 is 0.60mm, and the Chelex100 fixing glue 4 The thickness is 0.40mm.

[0053] Correspondingly, the thickness of the diffusion layer of the DGT probe described in this embodiment for phosphorus is: filter membrane 2+diffusion glue 3+Chelex-100 fixing glue+silver iodide fixing glue 5=1.53mm; the thickness of the diffusion layer for metal is : filter membrane 2+diffusion glue 3+silver iodide fixing glue 5=1.13mm; the thickness of the diffusion layer for chalcogen is: filter membrane 2+diffus...

Embodiment 3

[0056] The immobilized gel DGT probe described in this example is as image 3 and Figure 4 As shown, it includes: the first cover plate 11, the first filter membrane 21, the first diffusion glue 31, the hydrated iron oxide fixing glue 6, the substrate 7, the silver iodide fixing glue 5, the Chelex-100 fixing glue, the second Diffusion glue 32, the second filter membrane 22 and the second cover plate 12, wherein the thickness of the first diffusion glue 31 and the second diffusion glue 32 is 0.39mm, the thickness of the first filter membrane 21 and the second filter membrane 22 Both are 0.14mm, the thickness of hydrated iron oxide fixing glue 6 is 0.40mm, the thickness of silver iodide fixing glue 5 is 0.60mm, and the thickness of Chelex100 fixing glue 4 is 0.40mm.

[0057] For the fixed glue DGT probe described in this embodiment, the thickness of the diffusion layer for metal is: the second filter membrane 22+the second diffusion glue 32=0.53mm; the thickness of the diffusi...

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Abstract

A DGT probe and sediment/water interface micro-area detection method using same. A three-layer fixed-glue DGT probe is provided in the invention. The probe includes sliver iodine-Chelex 100 fixed glue composed of sliver iodine glue and Chelex 100 fixed glue, wherein the sliver iodine glue and the Chelex 100 fixed glue are attached tightly to each other. The probe also includes hydrated ferric oxide fixed glue. Internal sides of both the sliver iodine-Chelex 100 fixed glue and the hydrated ferric oxide fixed glue are at least provided with substrates. External side of both the sliver iodine-Chelex 100 fixed glue and the hydrated ferric oxide fixed glue are at least provided with diffusion glue. The hydrated ferric oxide fixed glue is not arranged on the external side of the sliver iodine-Chelex 100 fixed glue. With the fixed glue DGT probe, a detection tool and an evaluation system which are more accurate in deep identification and determination of characteristics of lake phosphorus internal loading are provided and an important scientific basis for lake eutrophication control and water ecological restoration.

Description

technical field [0001] The present invention relates to DGT (thin film diffusion gradient) passive sampling technology of lake sediments and multi-pollutants in the water-water interface overlying the sediments, gel follow-up analysis and data processing technology, in particular to a multi-layer fixed gel DGT probe and Micro-area assay technology using this probe. Background technique [0002] Lake pollution, especially the eutrophication of lakes, has been a major problem in my country's water environment research for a long time. Phosphorus is an important limiting factor that causes lake trophication. Sediment, as an important reservoir of lake nutrients, is an important source of phosphorus internal load in water bodies. In-depth research and clarification of the origin, environmental processes, and magnitude of phosphorus internal loading at the sediment / water interface play an important role in controlling lake trophication. The composition of pore water in sediment...

Claims

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Application Information

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IPC IPC(8): G01N13/00
Inventor 王圣瑞吴志皓焦立新倪兆奎
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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