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Abstract
An automated ion chromatograph using hollow-fibre eluent suppression is shown to be a suitable instrument for continuous determination of F−, CI−, PO4 −3, NO 3 and SO 4 −2 at environmental concentrations in natural surface and ground water samples. Analytical precision for both standard anion solutions and samples, and the effect of NO −3 sample concentration on NO −3 retention time, is shown. Peak height and peak area quantification are compared and the effects of high CI− content, pH, storage and filtration on sample analysis are determined. The advantages of frequent automatic recalibration in maintaining reproducibility in continuous analysis are shown.