Fluoride Determination by Ion Chromatography in Fluorocarbon Coatings

摘要

A quantitative ion chromatographic analytical method for the determination of fluorine in fluorocarbon coatings is proposed. The extraction of the anions from the samples was performed using potassium hydroxide after centrifugation drying to dissolved at preference temperature. Using H column to remove large amounts of potassium ions in the solution. The solution was filtered ith 0.22 urn filtering membrane, 25μL of the filtrate were separated on AS 18 separation column and AS 18 protective column using buffer solution of 30 mmol/L potassium hydroxide solution mobile phase. In paper describe the observed limits of detection and of quantitation in percent and the mean relative standard deviation in percent .This method is simple operation, less interference factors, fast analysis speed, the determination results accurate and reliable, with good repeatability and reproducibility.