Determination of fluoride in wine by fluoride selective ion electrode, standard addition method: collaborative study

J AOAC Int. 2003 Nov-Dec;86(6):1203-7.

Abstract

The accuracy, precision, and reproducibility of a rapid method for determination of fluoride in wine, using a fluoride selective ion electrode, were established by a collaborative study involving 12 laboratories, 5 in Europe and 7 in the United States. The laboratories assayed 6 Youden pairs of fluoride-fortified, red and white wine samples with fluoride concentrations ranging from 0.2 to 3.0 mg/L. The relative standard deviations of repeatability ranged from 1.94 to 4.88%; relative standard deviations of reproducibility ranged from 4.15 to 18.40%. HORRAT values ranged from 0.30 to 0.97. The average recovery was 99.97%. Based on the statistical results of this collaborative study, the Study Director recommends that this method be adopted First Action.

MeSH terms

  • Algorithms
  • Buffers
  • Calibration
  • Electrochemistry
  • Electrodes
  • Fluorides / analysis*
  • Hydrogen-Ion Concentration
  • Indicators and Reagents
  • Reference Standards
  • Reproducibility of Results
  • Solutions
  • Wine / analysis*

Substances

  • Buffers
  • Indicators and Reagents
  • Solutions
  • Fluorides