What Water Should Be Used for Ion Chromatography?

Given that ion chromatography is basically an analytical technique used for measuring ionic substances, the most important point is to use water with ions sufficiently removed. It is best to use water from an ultra-pure water production system with specific resistance of 18 MΩ·cm or greater.

The quality of commercial HPLC grade distilled water is guaranteed for use in analysis using UV absorption detectors, as mentioned above, but it is not necessarily guaranteed for use in analyzing inorganic ions. Therefore, you should confirm that the water does not cause any analysis problems before using it. In general, commercial water marked as ion-exchanged water or purified water is not recommended, because the quality can vary depending on the manufacturer. Based on the above points, it can be said that for ion chromatography, using freshly purified water from an ultra-pure water production system will provide more trouble-free and worry-free results.