title: Enthalpimetric determination of fluoride.
abstract: An injection calorimeter used for analytical and thermochemical purposes is described. Amounts of sodium fluoride between 6 and 8 mg are determined with an error of +/-0.04 mg. The calorimeter is also used in determining DeltaH for the precipitation of lead chloro-fluoride from water solutions with an ionic strength of 1M. DeltaH = 36.6 +/- 0.3 kJ mole . Quantitative analysis is made by flow microcalorimeter with amounts of sodium fluoride between 40 and 400mug and an error of +/-4 mug. An ion-exchange system for separation of fluoride from phosphate, sulphate, nitrate and chloride is also described.
authors.affiliation: Department of Analytical Chemistry, Chemical Center, University of Lund, Lund, Sweden.
authors.forename: C E
authors.initials: CE
authors.lastname: Johansson