Figure 2: IC traces with and without chloride removal set-up. A. Peaks of a 1 ppm solution (all species are at the same concentration) in normal set-up. B. Peaks of the same solution in Cl-removal set-up. The latter does not contain chloride or nitrite but displays a slightly larger carbonate peak. The shift in retention time for all ions in panel B compared to panel A is expected, because the Cl-removal setup increases the path length for the solution as it travels from the autosampler to the detector. Both panels show an increase in the baseline over the course of the run which is due to the ramp-up of the KOH concentration.