On-line film abstractor combined with ion chromatography

A technology of ion chromatography and extractor, which is applied to the combined device for online extraction and detection of trace anions in non-water-soluble organic matter. The effect of expanding the range of application

Inactive Publication Date: 2009-08-26
ZHEJIANG UNIV
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Problems solved by technology

[0003] Ion chromatography is a conventional method for detecting trace anions at present. It has the advantages of fast analysis speed, high separation ability, simple method, and simultaneous analysis of multiple components. However, it can only be used to determine trace anions in aqueous solutions and water-soluble organic compounds. , cannot detect trace anions in water-insoluble organic matter

Method used

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  • On-line film abstractor combined with ion chromatography

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Embodiment 1

[0016] See attached figure 1 , the membrane extractor comprises a magnetic stirrer 1, a magnet 2, a hollow fiber membrane 3, a sample bottle 4, and the hollow fiber membrane 3 and the magnet 2 are installed in the sample bottle, and the magnetic stirrer is located at the bottom of the sample bottle 4, and the magnetic force The stirrer and the magnet ensure that the anions in the water-insoluble sample can be fully and effectively extracted to the deionized water in the hollow fiber membrane; the first liquid phase pump 5 is connected with the hollow fiber membrane 3 in the sample bottle 4; A six-way valve 8 is connected clockwise from top to bottom with one interface of the quantitative loop 7, the second liquid phase pump 11, the second six-way valve 9, the other interface of the quantitative loop 7, and the sample bottle 4 The hollow fiber membrane 3 in the center is connected with the waste liquid outlet; the second six-way valve 9 is respectively connected with an interfa...

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Abstract

The invention relates to a on-line film abstractor combined with the ion chromatography, comprising three pumps, two six-way valve, a pre-column and a film abstractor. A trace amount of anion in the non-water-solubility organic matter is extracted to the deionized water through the hollow fiber film, the extract liquor is conveyed to the quantitative ring of the first six-way valve by the first liquid pump, then collected by the second liquid pump to the pre-column of the second six-way valve, the anion collected on the pre-column is transferred by the ion chromatographic pump to the ion chromatographic column for separating and detecting. The invention has few reagent consumption, direct sampling without the treatment, can detect the trace amount of anion in the non-water-solubility organic matter, thus enlarging the application range of ion chromatogram.

Description

technical field [0001] The invention relates to an online membrane extractor combined with ion chromatography, which belongs to the field of instrument analysis, and more specifically relates to a combined device capable of realizing online extraction and detection of trace anions in non-water-soluble organic matter. Background technique [0002] Membrane extraction technology is a new type of separation technology that combines membrane separation technology and extraction technology. It integrates sampling, extraction and concentration, and has the characteristics of high enrichment multiple, high purification efficiency, less organic solvent consumption, and low cost. It has been coupled with high performance liquid chromatography and gas chromatography, but has not been applied to the field of ion chromatography. [0003] Ion chromatography is a conventional method for detecting trace anions at present. It has the advantages of fast analysis speed, high separation abilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/00G01N30/08
Inventor 胡真真朱岩
Owner ZHEJIANG UNIV
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