Determination of Fluorine in Metallurgical Ferric Dust by Alkali Fusion-Ion Selective Electrode Method
Metallurgicalferricdust was fused by NaOH and dissolved in water.Fluorine in the sample was effectively melted out.The pH of the solution was adjusted by hydrochloric acid(1+1)and NaOH solution with alizarin red S solution as the indicator.Then the pH of the solution was adjusted between 5 and 6 by adding sodium citrate buffer solution.The potential value was measured with the fluoride ion selective electrode to calculate the content of fluorine in the sample.The results indicate that the relative standard deviations(RSD,n=8)of measured results were less than 3.00%and the recoveries were between 95%-110%.
ion selective electrodemetallurgicalferricdustfluorinalkali fusio
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