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Ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin

A technology of ion chromatography and analysis system, applied in the direction of analyzing materials, measuring devices, material separation, etc., can solve the problems of inability to detect chromium content, etc., achieve the effects of reducing sample pretreatment process, shortening sample analysis time, and good selectivity

Active Publication Date: 2013-05-08
ZHEJIANG UNIV +1
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Problems solved by technology

Since these three methods can only measure the total chromium content, but cannot detect the chromium (Ⅵ) content, there are certain defects in their practical significance.

Method used

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  • Ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin
  • Ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin
  • Ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin

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Embodiment Construction

[0029] The present invention utilizes Dionex ICS-2100 ion chromatograph to be equipped with EG eluent generator, Dionex Ultimate 3000 variable wavelength ultraviolet-visible detector, Dionex Ultimate 3000 quaternary gradient pump, Shimadzu LC-9A infusion pump to realize the heavy metal chromium ( VI) Determination. The pretreatment column, guard column 1, guard column 2, analysis column, etc. are connected to the Dionex ICS-2100 ion chromatograph in sequence.

[0030] The operation steps of the ion chromatography-on-line pretreatment analysis system for the determination of heavy metal chromium (Ⅵ) in donkey-hide gelatin are as follows:

[0031] (1) Sample loading: such as figure 1 , the sample is injected into the quantitative loop. At this time, the six-port valve is in the Load state and the ten-port valve is in the A state. The quaternary gradient pump provides the online pre-eluent to balance the online pretreatment column, and the ion chromatograph comes with a pump to...

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Abstract

The invention relates to a use system of chemical apparatus analysis, and particularly to an ion chromatography-online pretreatment analysis system for determining heavy metal chromium (VI) in donkey-hide gelatin. A simply processed donkey-hide gelatin sample passes through a polymer reversed-phase column, interfering substances in the donkey-hide gelatin are removed online under an alkali condition, then the processed sample solution is enriched in an enriching pipe by an ion chromatography-valve switching technology and is separated through an anion exchange chromatographic column, and then post-column derivatization visible light detection is carried out. As the ion chromatography-online pretreatment analysis system adopts an ion chromatography-online pretreatment analysis technology, fussy sample pre-treatment processes can be reduced and even omitted, the sample analysis time is shortened, and the detection efficiency is enhanced. By virtue of the post-column derivatization visible light detection, no other interfering ions appear and the selectivity is good. The ion chromatography-online pretreatment analysis system can be suitable for a series of other problems of separation and detection on ions in complex matrixes, and has a high practical value.

Description

technical field [0001] The invention relates to an application system for chemical instrument analysis, in particular to an ion chromatography-online pretreatment analysis system for the determination of heavy metal chromium (VI) in donkey-hide gelatin. [0002] Background technique [0003] As a modern analytical method, ion chromatography is widely used in the detection of various ionic compounds. Complex samples contain various ions, but our target ions are usually only a few of them. Sometimes due to the complexity of the sample matrix and the impact on the determination of target ions, it usually takes a long time for sample pretreatment. The ion chromatography-online pretreatment technology can better solve this problem. [0004] Chromium (Ⅵ) is highly carcinogenic and mutagenic, and its toxicity is 100 times greater than that of chromium (Ⅲ) because it is more easily absorbed by the body. Long-term exposure to chromium (VI) is potentially harmful to human health. ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
Inventor 杨宇玲朱岩梅喜艳吕秀阳尤金花田守生张淹姜仁禹
Owner ZHEJIANG UNIV
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