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Determination of fluoride in cocoa powder by ion-selective electrode

by Pesselman, R.L; Loken, R.G; Hoffman, M.J; Feit, M.J.
Publisher: Nov-Dic 1989Subject(s): CACAO EN POLVO | FLUORUROS | COMPOSICION QUIMICA | METODOS | ANALISIS QUIMICO | FLUORIDES | CHEMICAL COMPOSITION | METHODS | FLUORURE | COMPOSITION CHIMIQUE | METHODE In: Journal of Food Science (EUA) v. 54(6) p. 1650, 1652Summary: A method to determine free fluoride concentration in soluble cocoa powder by a fluoride-selective electrode was developed and validated. Calibration was linear over the 0.51 to 3.03 ppm range. Free flouride ion concentration data were in the 0.52 to 1.49 ppm range, with recoveries varying from 81 percent to 89 percent using a standard addition procedure.
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A method to determine free fluoride concentration in soluble cocoa powder by a fluoride-selective electrode was developed and validated. Calibration was linear over the 0.51 to 3.03 ppm range. Free flouride ion concentration data were in the 0.52 to 1.49 ppm range, with recoveries varying from 81 percent to 89 percent using a standard addition procedure.

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