Leacheate generation device used in ion chromatography system

An eluent generation and ion chromatography technology, which is applied in the field of eluent generation devices, can solve the problems of uneven electrolyte, affect the stability of the baseline, increase costs, etc., and achieve the effects of uniform electrolyte, simple structure and low cost.

Inactive Publication Date: 2016-12-21
QINGDAO LUHAI PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the user finishes using the eluent mother solution or needs to use other eluent buffers, he needs to replace the eluent generator as a whole, which greatly increases the cost; secondly, the eluent generators currently on the market only pass ion chromatography The high-pressure pump in the system is used to transport the generated eluent buffer, and there is no mixing device in the ion electrolyte storage room, which will cause the inhomogeneity of the electrolyte; and the currently used eluent generators are all located in the pump In the post-state operation (that is, pure water passes through the pump and then through the generation chamber and finally enters the separation column), so that the eluent buffer does not go through a buffer stage and directly enters the ion chromatography system for operation, which may affect the stability of the baseline

Method used

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  • Leacheate generation device used in ion chromatography system
  • Leacheate generation device used in ion chromatography system
  • Leacheate generation device used in ion chromatography system

Examples

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Effect test

Embodiment 1

[0021] The high-concentration potassium hydroxide solution in the electrolyte mother liquid storage chamber is circulated in the eluent mother liquid circulation channel through a peristaltic pump. The eluent mother liquid passes through the ion electrolysis chamber and is electrolyzed by the Pt anode installed to generate hydrogen ions. The pump drives pure water to pass through the eluent buffer to create a channel, and electrolysis generates hydroxide ions. The hydrogen ions generated at the anode replace the potassium ions in the electrolyte solution, and the potassium ions cross the cation exchange membrane and enter the eluent buffer to create a channel. . Potassium ions and hydroxide ions entering the eluent generation channel are mixed to generate eluent; then, the eluent is further buffered by a high-pressure pump through a fluid flow device such as a catheter, thereby providing a stable hydroxide for the ion chromatography system Potassium eluent. If the potassium h...

Embodiment 2

[0023] When the eluent generating device of the present invention is installed in the ion chromatography system to start running, such as figure 2 As shown, when no sample is injected, the baseline is basically in a straight line state, the baseline noise value is 12µV, and the baseline drift value is 701µV. image 3 As shown, the peak height value is 11000µV. According to the calculation, the noise value of the present invention is 12 / 11000×100%=0.11%FS, and the drift value is 701 / 11000×100%=6.37%FS; The same ion chromatographic system is installed with an eluent generator produced by an imported brand during the start-up process, when no sample is injected, such as Figure 4 As shown, the baseline is wavy, the baseline noise value is 0.0065µS, and the baseline drift value is 0.30µS. When the sample is injected, such as image 3 As shown, the peak height value is 4.345µS. According to the calculation, the noise value of the present invention is 0.0065 / 4.345×100%=0.15%FS, an...

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Abstract

The invention provides a leacheate generation device used in an ion chromatography system, and belongs to the field of ion chromatography generation devices. The leacheate generation device is simple in structure, relative low in cost and convenient and rapid to use; in addition, mother liquor of electrolyte can be changed by a user randomly without changing a generation device, and electrolyte can be relatively uniform as the mother liquor is circulated by using a peristaltic pump; particularly, the leacheate generation device is arranged in front of a pump, so that the leacheate is further buffered by the pump after being generated, thus not affecting the stability of the ion chromatography system. The leacheate generation device comprises a leacheate circulation channel with an ion leacheate circulation channel, an ion exchange membrane and a flowing type leacheate buffer solution generation channel. The leacheate generation device can be used for preparing a stable leacheate buffer solution.

Description

technical field [0001] The invention relates to the field of ion chromatography generating devices, in particular to an eluent generating device used in ion chromatography systems. Background technique [0002] A buffer is a solution that resists changes in pH when small amounts of acid or base are added. The pH buffer system plays an important role in maintaining the normal pH value of organisms and the normal physiological environment. [0003] Buffers are widely used in analytical chemistry. When developing a stringent method, it is desirable to select a mobile phase that has a final pH at least one pH unit away from the pK value of any analytes in order to cause ionization or inhibition of those analytes. Slight changes in pH can have a dramatic effect on a separation in terms of selectivity, capacity factor, peak shape, resolution, and reproducibility. When using a stock buffer solution, the final concentration of the buffer can only be changed by changing the ratio ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/96
CPCG01N30/96
Inventor 张道敬孙婷赵世龙黄宪亭郑雁周成
Owner QINGDAO LUHAI PHOTOELECTRIC TECH
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