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Modified zirconium-eriochrome cyanine R determination of fluoride

January 1, 1957

The Eriochrome Cyanine R method for determining fluoride in natural water has been modified to provide a single, stable reagent solution, eliminate interference from oxidizing agents, extend the concentration range to 3 p.p.m., and extend the phosphate tolerance. Temperature effect was minimized; sulfate error was eliminated by precipitation. The procedure is sufficiently tolerant to interferences found in natural and polluted waters to permit the elimination of prior distillation for most samples. The method has been applied to 500 samples.

Citation Information

Publication Year 1957
Title Modified zirconium-eriochrome cyanine R determination of fluoride
DOI
Authors L.L. Thatcher
Publication Type Article
Publication Subtype Journal Article
Series Title Analytical Chemistry
Series Number
Index ID 70010692
Record Source USGS Publications Warehouse
USGS Organization