COMPARISON OF GRADIENT ELUTION SEPARATIONS FOR ORGANIC AND INORGANIC ANIONS WITH CHEMICALLY SUPPRESSED CONDUCTOMETRIC DETECTION

Gradient elution separations were developed for four pellicular and two macroporous resin based columns for the analysis of high-purity water. These elution techniques are applicable to both concentrator and loop injections and used sodium hydroxide and sodium tetraborate eluents with suppressed conductivity detection. The analytes of interest are fluoride, acetate, formate, pyruvate, chloride, nitrite, nitrate, bromide, sulfate and oxalate. These comparisons allow for the proper selection of column and eluent for part-per-billion (10(9)) and sub-part-per-billion analysis of high purity water.