Abstract
A method for the determination of fluoride in coal using pyrohydrolysis for sample decomposition is proposed. An apparatus was constructed, and the influence of vanadium pentoxide (V2O5) as a catalyst for the pyrohydrolysis reaction was investigated. It was verified that V2O5 does not influence the release of fluoride from coal. Certified and non-certified samples were analysed using an ion selective electrode (ISE) for analyte detection. Precise (RSD < 7%) and accurate (recovery in accordance with certified values) results were obtained. The limit of quantification (LOQ) of the method was 5.0 μgF/g of sample, using 20 mg of sample and a final dilution to 10 mL. The sample frequency was 5 samples h-1.
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Dressler, V. L., Pozebon, D., Flores, É. L. M., Paniz, J. N. G., & Flores, É. M. M. (2003). Determination of fluoride in coal using pyrohydrolysis for analyte separation. Journal of the Brazilian Chemical Society, 14(2), 334–338. https://doi.org/10.1590/S0103-50532003000200024
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