DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements

A technology of soil elements and diffusion membranes, which is applied in the field of thin film gradient diffusion technology devices for easy and dynamic extraction of inorganic elements, can solve the problems of complicated monitoring process, increased test error, and insufficient test accuracy, and achieves low cost, convenient operation, and easy operation. and well-marked effects

Active Publication Date: 2019-01-04
TIANJIN TIANRUN YIKANG ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

The monitoring process of the method is too complicated, which increases the test error in the process, resulting in insufficient test accuracy

Method used

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  • DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements
  • DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements
  • DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements

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Embodiment Construction

[0039]In order to further understand the content, characteristics and effects of the present invention, the following examples are provided, and the detailed description is as follows. It should be noted that the present examples are descriptive, not restrictive, and can not limit the protection scope of the present invention thus.

[0040] A gradient sampler suitable for extracting the active state of unsaturated soil elements, comprising a circular base 6, a diffusion support net 4 and a sealing cover 1, a cylindrical diffusion support net coaxially fixed on the circular base, and a diffusion support net The inner part of the coaxial seal is embedded with a sealing cover, and the diffusion film 3 is coaxially applied on the inner edge of the diffusion support network. The diffusion film is a regenerated fiber film, and the exclusion molecular weight is between 7000-15000. Slidingly install a pressure valve plate 5, install a compression spring 2 between the pressure valve pla...

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Abstract

The invention relates to a DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements. Equipment for the technology comprises a sampler, a round base, a diffusion support network and a sealing cover, wherein the cylindrical diffusion support network is coaxially and fixedly mounted on the round base; the sealing cover is coaxially embeddedinto the upper part of the diffusion support network in a sealed manner; a diffusion film is coaxially applied to the inner edge of the diffusion support network; a pressure valve plate is coaxially mounted on the inner edge of the diffusion film of the diffusion support network in a sliding manner; a compression spring is mounted between the pressure valve plate and the sealing cover; the diffusion film between the pressure valve plate and the base is filled with heavy metal absorbing gel. According to the DGT, two gradients including inorganic element and water can be provided, so that heavymetal in upland soil can be adsorbed in site, accuracy of a detection result is greatly improved, monitoring cost is reduced, and the defect that original DGT cannot be used under the water shortagecondition is overcome.

Description

technical field [0001] The invention belongs to the field of soil inorganic element monitoring, and relates to a thin film gradient diffusion technology (Diffusive gradients in thin films, DGT) device for easy and dynamic extraction of inorganic elements in the analysis of environmental media such as dry soil. Background technique [0002] In 1994, DGT (Diffusivegradients in thin-films) technology came into being. DGT technology is composed of protective film, diffusion film and bonding, and the bonding phase is one of the core components of DGT. Gradient diffusion thin film (DGT) technology is a new type of in-situ passive sampling technology, which can enrich the monitored substance and quantitatively measure the effective concentration of the substance in the environment according to the enrichment amount of the monitored substance. It is currently an ideal Elemental speciation collection and analysis methods (Davison et al, 1994; Zhang et al., 1995; Scally et al., 2006)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 赵玉杰张璠张闯闯周其文刘潇威刘佳凤孙杨王继军
Owner TIANJIN TIANRUN YIKANG ENVIRONMENTAL PROTECTION TECH CO LTD
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