Resumo

AGUILAR R, Patricia. Validación del método Potenciométrico por Ión Selectivo para la determinación de Flúor en sal, agua y orina. Rev. perú. med. exp. salud publica [online]. 2001, vol.18, n.1-2, pp.21-23. ISSN 1726-4634.

Objective: To validate the ion?selective potentiometric method for fluorine determination. Materials and methods: Three different samples (salt, water and urine) were analyzed; 3 analysts took part in the water and salt determination and 2 in the urine's. The validation was done in 2 days, having performed 10 trials/day. The accuracy, in terms of reproducibility and repeatability, and the precision of the method (in terms of recovery of the analyte added to the sample) were determined. Results: A Relative Standard Deviation (RSD) of 2.68%, 3.29% and 2.52% in salt, water and urine was obtained, and it was also possible to recover 98.20%, 99.42% and 98.11% of the analito for the same salt, water and urine samples. Conclusion: The ion?selective potentiometric method, if used in optimal and appropriate conditions, can be useful to determine fluorine in salt, water and urine samples.

Palavras-chave : Validation studies; Fluorine; Ion-selective electrodes.

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