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Determination of fluoride in water - A modified zirconium-alizarin method

January 1, 1945

A convenient, rapid colorimetric procedure using the zirconium-alizarin indicator acidified with sulfuric acid for the determination of fluoride in water is described. Since this acid indicator is stable indefinitely, it is more useful than other zirconium-alizarin reagents previously reported. The use of sulfuric acid alone in acidifying the zirconium-alizarin reagent makes possible the maximum suppression of the interference of sulfate. Control of the pH of the samples eliminates errors due to the alkalinity of the samples. The fluoride content of waters containing less than 500 parts per million of sulfate and less than 1000 p.p.m. of chloride may be determined within a limit of 0.1 p.p.m. when a 100-ml. sample is used.

Citation Information

Publication Year 1945
Title Determination of fluoride in water - A modified zirconium-alizarin method
DOI
Authors W.L. Lamar
Publication Type Article
Publication Subtype Journal Article
Series Title Industrial and Engineering Chemistry
Series Number
Index ID 70010902
Record Source USGS Publications Warehouse
USGS Organization