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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

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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.

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Authors and Affiliations

  1. Faculty of Science and Letters, Chemistry Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey

    Nil Ozbek & Suleyman Akman

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  1. Nil Ozbek
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  2. Suleyman Akman
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Correspondence to Nil Ozbek.

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This study was not funded by any agencies/institutes.

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Nil Ozbek declares that she has no conflict of interest.

Suleyman Akman declares that he has no conflict of interest.

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For this type of study, formal consent is not required. This study does not contain any studies with human participants or animals performed by any of the authors.

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Ozbek, N., Akman, S. 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. Food Anal. Methods 9, 2925–2932 (2016). https://doi.org/10.1007/s12161-016-0488-4

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  • DOI: https://doi.org/10.1007/s12161-016-0488-4

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