English Abstract The modification of an ionchromatographic system to
increase the sensitivity and selectivity is reported. The chromatographic
system was equipped with a UV-detector, modified by thermostatting the
separatorcolumn and the regenerant supply and isolating an autoregenerant
suppressor and detector cells. Connections between the separating modules
were shortened. A method for the determination chloride, nitrate and
sulphate in rainwater, drinking water, surface water and groundwater over a
range of more than four decades has been developed. A good resolution and
selectivity between the peaks is obtained. Identification of peaks is
possible by retention time, area/height ratio and confirmed by the ratio
between the conductivity area and UV-detection area. Determinations of
nitrite, bromide, phosphate and sulphite are also possible with the
method.
