An HPLC Anion Exclusion Method for Fluoride Determinations in Complex Effluents

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Abstract
A single-column nonsuppressed ion chromatographic (IC) method is described for the determination of fluoride in wastewater effluents and aqueous process streams. The method utilizes a polymeric liquid chromatography column, commonly used for organic acid analysis and conductivity detection. Fluoride is determined at low ppm (mg/l) levels in the presence of high concentrations of potential ionic interferents such as chloride and sulfate, utilizing ion exclusion as the principal separation mechanism. The limit of detection is 0.2-ppm fluoride with a working linear dynamic range of 0.2- to 100-ppm flouride. Both ion exchange and ion exclusion techniques were evaluated during the course of the study. Only nonsuppressed detection modes were employed due to the unavailability of a suppressor system.

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