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 main difference between it and traditional ion exchange chromatography is that the resin has high crosslinking degree and low exchange capacity, and the sample volume is very small. When the eluent is transported by a plunger pump, the online automatic continuous conductivity detection of the eluent is usually carried out.
Extended data
Working process of ion chromatograph
The infusion pump delivers the mobile phase to the analysis system at a stable flow rate (or pressure) and introduces the sample through the sampler in front of the chromatographic column. The mobile phase brings the sample into the chromatographic column, where the components are separated and flow to the detector in turn with the mobile phase. Suppression ion chromatography adds a suppression system in front of conductivity detector.
That is, another high-pressure infusion pump is used to deliver the regenerated liquid to the suppressor, in which the background conductance of the mobile phase is reduced. The effluent is then introduced into the conductivity detection cell. The detected signal is sent to the data system for recording, processing or saving. Non-inhibitory ion chromatograph does not use suppressor and high-pressure pump to transport regenerated liquid. Therefore, the structure of the instrument is much simpler and the price is much cheaper.
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