Analysis and Comparison of Fluoride in Hydrogen Fluoride Solution by Ion Chromatography and Ion Selective Electrode
Fluorides are organic or inorganic compounds containing negative valence fluorine.like other halogens,fluorine forms a mononegative anion.examples of inorganic fluorides are hydrofluoric acid(HF),sodium fluoride(NaF),etc.in this paper,the fluoride in hydrofluoric acid(HF)solution was analyzed by ion selective electrode method and ion chromatography.it was found that when the solution contained hydrofluoric acid(HF),the analysis result interfered with the pH value,and the lower the pH value,the higher the fluoride result.The interference was minimal when the solution was neutralized into an alkaline condition with sodium hydroxide and the sample was diluted with sodium bicarbonate-sodium bicarbonate eluent system.when the solution containing hydrofluoric acid(HF)is analyzed by ion selective electrode method,the pH value of the solution is low,and the H+is high,the concentration of fluoride is high,and the interference is minimum when the pH value of the solution is adjusted to the neutral condition,and the result is closest to the true value.
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