Abstract
Single Column Ion Chromatography (SCIC) combines ion exchange separation with direct electrical conductivity detection. Because no “supressor column” is used in SCIC the post-column dead volume is minimized. This means that “HPLC” technology can be applied to reduce analysis times. The analysis of chloride, nitrate, and sulphate can be accomplished in 6 min using a standard 250×4.6 mm LC column packed with a low-capacity ion-exchange chemically bonded silica leading to a sensitivity of 100 ppb. A 1 min analysis for chloride, nitrate, and sulphate at the ppm level is possible using a 30×4.6 mm column eluted with 4mM phthalate buffer at pH 4.5.
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