title: Optical-fibre sensing of fluoride ions in a flow-stream.
abstract: The Alizarin Fluorine Blue method for the determination of fluoride has been adapted for use with optical fibres. The reagent was immobilized on a polymer matrix, Amberlite XAD-2, and the reflectance of this reagent phase was measured as a function of fluoride concentration by use of a flow-cell assembly and a bifurcated fibre-optic system. A linear response was obtained for 0.16-0.95mM fluoride at a pH of 4.1, with a response time of approximately 12 min.
authors.affiliation: Department of Instrumentation and Analytical Science, UMIST, P.O. Box 88, Manchester, England.
authors.forename: R
authors.initials: R
authors.lastname: Narayanaswamy
authors.forename: D A
authors.initials: DA
authors.lastname: Russell
authors.forename: F
authors.initials: F
authors.lastname: Sevilla