Abstract
Ion chromatography with self-regenerating suppression and conductivity detection was used for the simultaneous determination of Na +, NH 4 +, K +, Mg 2+ and Ca 2+ in melted snow samples from high-alpine sites. Concentrations in the samples showed a high variability and were in the range of 0.3 to 800 μg.kg. Samples with concentrations higher than 2 μg/kg representing summer snow were analyzed using a 100-μl sample loop. In order to determine the low concentrations in winter snow samples (< 2 μg/ kg), preconcentration of 2-ml samples was applied resulting in improved detection limits of 0.1–0.4 μg/kg depending on the cation.
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