Multi-working-mode ion chromatograph

Abstract

The invention relates to the technical field of ion chromatographic analysis, and in particular relates to a multi-working-mode ion chromatograph which comprises a detection case, a pure water bottle, a first peristaltic pump, a plunger pump, a leacheate generator, a sample injection valve, a chromatographic column, a suppressor and a conductivity detector. By arranging the first peristaltic pump on a pipeline, the pressure of the plunger pump can be effectively shared, so that the two ends of the plunger pump are both in a positive pressure environment, the phenomena that air leaks into the pipeline and the like can be effectively reduced, the stable working flow speed of the plunger pump can be ensured, and the detection result is prevented from being influenced; in addition, since the flow velocity of the first peristaltic pump is greater than that of the plunger pump, liquid shortage is avoided, timely liquid supplement is guaranteed, and continuous and stable detection is guaranteed. By arranging a degassing device and a gas-liquid separator, dissolved gas and non-dissolved gas in the pipeline are effectively removed, the gas amount in the pipeline is reduced, the problem of liquid shortage is solved, and it is guaranteed that the working flow speed of the plunger pump is stable, the detection base line is stable, and the result is accurate.

Description

technical field [0001] The invention relates to the technical field of ion chromatographic analysis, in particular to an ion chromatograph with multiple working modes. Background technique [0002] Ion chromatography is a kind of high-performance liquid chromatography, so it is also called high-performance ion chromatography (HPIC) or modern ion chromatography. The exchange capacity, the injection volume is very small, and the eluent is delivered by a plunger pump, and the online automatic continuous conductivity detection of the eluate is usually performed. [0003] The working process of an ion chromatograph is usually: the plunger pump sends the mobile phase to the analysis system at a stable flow rate (or pressure), and the sample is introduced through the injector before the chromatographic column, and the mobile phase brings the sample into the chromatographic column. The components in the chromatographic column are separated and flow to the conductivity detector in s...

AI Technical Summary

Problems solved by technology

[0004] During the working process of the ion chromatograph, due to the high pressure of the plunger pump and the positive pressure environment and negative pressure environment at both ends, there will be leakage and air inflow at the multi-pipeline connection, and the air in the pipeline will be serious. Affecting the unstable phenomenon of the working flow rate of the plunger pump, which will affect the fluctuation of its detection baseline and cause the final detection result to be inaccurate

In addition, due to the high pressure provided by the plunger pump, when there is a lot of air in the pipeline, it is prone to lack of liquid. It requires manual or additional equipment to extract the air in the pipeline and accelerate the flow of the liquid to replenish the fluid. The operation is cumbersome and the work Low efficiency, affecting detection efficiency

When the existing ion chromatograph is used, more waste liquid will be generated, resulting in a waste of resources

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