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Semipermeable membrane for sampling organic contaminant in enriched water environment

A technology for organic pollutants and water environment, applied in semi-permeable membrane separation, membrane technology, sampling devices, etc., can solve the problems of inevitable secondary pollution of organic solvents, time-consuming and labor-intensive, etc.

Inactive Publication Date: 2006-07-19
NANKAI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, after sampling, this kind of SPMD method needs to go through complex organic solvent dialysis and rotary evaporation concentration and other post-processing steps, which is time-consuming and laborious. At the same time, due to the use of a large amount of toxic organic solvents, secondary pollution of organic solvents is inevitable.

Method used

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  • Semipermeable membrane for sampling organic contaminant in enriched water environment
  • Semipermeable membrane for sampling organic contaminant in enriched water environment

Examples

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Embodiment Construction

[0012] When operating, first measure the LDPE film tube that meets the experimental length requirements according to the SA-V ratio of the method. When cutting, you must add the length required for both ends of the seal to the required length (for example, 2-3cm, this section The length is not included in the SA-V ratio); take a certain proportion of the enrichment solvent and put it into the LDPE membrane tube, and then use a soft plastic bottle to press the membrane tube and roll it back and forth gently several times to drive out the air bubbles in the tube and make IL in the tube To achieve uniform distribution; use a plastic heat sealer to heat-seal the ports. Each port should be sealed with at least three openings, or the port can be sealed into a ring to facilitate installation on the SPMDs fixture.

[0013] When sampling, place the entire SPMD device 1 meter below the water surface. In the water environment, the mass transfer mechanism of pollutants is shown in the figu...

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Abstract

The invention relates to an enriched water environment organic contaminant sampling used semi-permeable diaphragm and its application. The device comprises a thin long strip type low density polyethylene (LDPE) film bifurcated pipe with an instant micro hole whose thickness is 70-95ª–m and the surface diameter is 5-10; The ratio of the film pipe surface and the dissolvent volume SA-V is 70-100cm2 / 1ml. The enriched medium of the film pipe is green dissolvent 1-methyl-3-butyl glyoxaline hexaflurate microcosmic salt or 1-methyl-3-hexyl glyoxaline hexaflurate microcosmic salt ion liquids. It can directly extract the enriched dissolvent to analysis after finishing the sampling and compares it with the dialysis compression and constant volume after-treatment of the (Triolein)-SPMD organic dissolvent.

Description

technical field [0001] The invention relates to a semipermeable membrane for sampling organic pollutants in enriched water environment and application thereof. Background technique [0002] As more and more organic pollutants are discharged into the environment, the environmental quality of important rivers, lakes, oceans and other water bodies deteriorates, and the available water resources gradually decrease. The monitoring of toxic organic pollutants in the water environment has become a very important task in environmental chemistry. The research content is also the main basis for formulating organic compound emission standards and environmental standards. [0003] In the 1980s, based on the fact that fat-soluble compounds could passively diffuse from the aqueous phase to the lipid phase, some scholars and researchers proposed the development of a semi-permeable membrane passive sampling device (Semi-Permeable Membrane Device, SPMD). Bryne and Ayloff applied for an inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/02B01D69/04
Inventor 戴树桂赵文岩韩萌徐建王平
Owner NANKAI UNIV
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