Abstract

A high-performance liquid chromatographic method based on indirect photometric detection is described for the analysis of inorganic anions in natural waters. Up to ten anions can be analyzed simultaneously with detection limits at the nanogram level. The working range covers three decades in concentration and the short term stability is around 1% for most anions. The validity of the method is proven by an inter-laboratory study and by the analysis of certified samples. The main advantages of this method over ion chromatography with suppressed conductivity detection are its simple response standardization and its simplicity as it involves conventional high-performance liquid chromatography equipment.

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