Optimization and Application of a Slurry Sampling Method for the Determination of Total Fluorine in Flour Using a High-Resolution Continuum Source Graphite Furnace Molecular Absorption Spectrometer

Nil Ozbek*, Suleyman Akman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A slurry sampling method was described for the determination of total fluorine in flour via molecular absorption of calcium monofluoride (CaF) at 660.440 nm using a high-resolution continuum source graphite furnace atomic absorption spectrometer (HR-CS GF AAS). The slurries were prepared in 1 % Triton X-100, kept in an ultrasonic bath for 15 min, mixed in a shaker for 5 min (750 rpm), and then vortexed for 30 s shortly before sampling. The samples were mixed with 40 μg of Ca in the graphite furnace, pyrolyzed at 900 °C, and the absorbances for CaF were measured at 2200 °C. The LOD and characteristic mass of the method were 0.22 and 0.16 ng, respectively. The F concentrations of certified reference bush branches and leaves were determined in the uncertainty limits of the certified values. Finally, the F concentrations of different types of flours were determined applying the optimized conditions.

Original languageEnglish
Pages (from-to)2925-2932
Number of pages8
JournalFood Analytical Methods
Volume9
Issue number10
DOIs
Publication statusPublished - 1 Oct 2016

Bibliographical note

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

Keywords

  • Calcium monofluoride (CaF)
  • Flour
  • Fluorine determination
  • High-resolution continuum source graphite furnace atomic absorption spectrometer (HR-CS GF AAS)
  • Molecular absorption spectrometry (MAS)
  • Slurry sampling

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