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Ion chromatography single-pump column switching system

A single-pump column switching, ion chromatography technology, applied in material separation, measuring devices, instruments, etc., can solve the problems of multiple chromatography accessories, complicated operation process, etc., to achieve the effect of simple analysis, simplified process flow, and reduction of chromatography accessories

Inactive Publication Date: 2010-06-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To complete the operation of column switching, it is necessary to control two ion chromatography instruments at the same time, requiring many chromatography accessories, and the operation process is cumbersome

Method used

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  • Ion chromatography single-pump column switching system
  • Ion chromatography single-pump column switching system
  • Ion chromatography single-pump column switching system

Examples

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Effect test

Embodiment 1

[0031] This example analyzes three common anions in a high-concentration citric acid matrix

[0032] Instruments used: Dionex ICS 2100 ion chromatograph (Dionex, USA); EG50 eluent generator; DS6 conductivity detector; Chromeleon 6.5 chromatography workstation; six-way valve; ten-way valve; IonPac ICE-AS6 ion exclusion column; IonPacAG11 -HC guard column (50mm×4mm); IonPacAS11-HC analytical column (250mm×4mm); 200 μL injection volume.

[0033] Suppressor: Xiamen University self-regenerating chemical suppressor;

[0034] Eluent: IonPac AG11-HC+IonPac AS 11-HC Eluent: KOH solution, the concentration is 25mmol / L.

[0035] IonPac ICE-AS6 ion exclusion column eluent: H 2 O (eluent after passing through the suppressor).

[0036] Flow rate: 0.55ml / min

[0037] The ion chromatography single-pump column switching system of the present invention is composed of an ion chromatography equipped with a ten-way valve and a six-way valve. The KOH solution generated by the eluent generator ...

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Abstract

The invention relates to an ion chromatography single-pump column switching system which mainly comprises a pump, a guard column, an analytical column, a suppressor, a conductivity detector, a sample loop, a ten-way valve, an ion exclusion column, a waste liquid barrel, a six-way valve, an enrichment column and other parts, wherein the pump is connected with the six-way valve; the enrichment column is connected on the six-way valve; the six-way valve is respectively connected with the guard column, the ion exclusion column and the waste liquid barrel; the analytical column is respectively connected with the guard column and the suppressor; the suppressor is respectively connected with the analytical column and the conductivity detector; the sampling loop is connected on the ten-way valve; and the ten-way valve is respectively connected with a conductivity flow cell, the conductivity detector, the ion exclusion column and the waste liquid barrel. The ion chromatography single-pump column switching system can ensure the analytical effect of conventional anions and realize the separation and the monitoring of the conventional anions in a high-concentration organic acid substrate by using one ion chromatography instrument, as well as simultaneously simplify the technological process, reduce chromatography accessories and save solvent consumption.

Description

technical field [0001] The invention relates to an ion chromatography single-pump column switching system. An analytical method for the determination of trace conventional anions in organic acids was established using an ion chromatography single-pump column switching system, and the separation and detection of trace conventional anions in high-concentration organic acid matrices was realized. Background technique [0002] Column-switched ion chromatography is the most commonly used method for the determination of trace anions in weakly ionized species. The principle is as follows: firstly, the ion exclusion column is used for online pretreatment of the sample, the ions to be analyzed are separated from the high-concentration weakly ionized substance solution, and then the separated and collected components are concentrated through the ion exchange concentration column, and finally the concentrated The final samples were separated by ion-exchange chromatography and detected...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 朱海豹朱岩
Owner ZHEJIANG UNIV
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