Fluoride determination in fluorinated milk by headspace gas chromatography

Fluorine Speciation Analysis Using Reverse Phase Liquid Chromatography Coupled Off-Line to Continuum Source Molecular Absorption Spectrometry (CS-MAS): Identification and Quantification of Novel Fluorinated Organic Compounds in Environmental and Biological Samples

“…Chemicals used for HPLC separation included potassium fluoride, 2, 4, 6trifluoro-benzoic acid (TFBA) and 5-fluoroindole-2 carboxylic acid (FICA). Chemicals used for AAS modifiers, reported by Gleisner et al, 17 included gallium nitride (99.9%, Sigma-Aldrich U.K. Ltd.), sodium acetate (May & Baker, U.K. Ltd.), zirconium (CPI International, USA Ltd.), palladium nitrate (99.999%, Sigma-Aldrich U.K. Ltd.) and magnesium nitrate (Fluka Analytical, U.K. Ltd.).…”

Simple determination of fluoride in biological samples by headspace solid-phase microextraction and gas chromatography–tandem mass spectrometry

“…Ion chromatography [9][10][11] is commonly used for the determination of fluoride, but the sensitivity is not adequate to detect g/L levels in biological samples. High performance liquid chromatography (HPLC) methods are performed using derivatives of the F − -La 3+ -alizarin complexone ternary complex [12], and gas chromatography (GC) methods are performed following the reaction with silylation reagents, such as trimethylchlorosilane and trimethylimidazolesilane [13][14][15][16][17]. When the derivatized fluoride is identified based on its retention time in the case of HPLC and GC, a high rate of false-identification may be introduced, especially in the analysis of complex samples, such as biological samples.…”

Sensitive determination of fluoride in biological samples by gas chromatography–mass spectrometry after derivatization with 2-(bromomethyl)naphthalene

“…Chemiluminescence [11] and ion chromatography [12][13][14] are used for the determination of fluoride, but their sensitivities are not adequate to detect mg L À1 level in biological sample. High-performance liquid chromatography (HPLC) methods [15] and gas chromatography (GC) [16][17][18][19] were used to analyze fluoride. Fluoride is required for reaction with derivatives of F À -La3 + -alizarin complexone ternary complex [15] for HPLC detection, and the reaction with derivatives of silylation reagents such as trimethylchlorosilane and trimethylimidazolesilane [16][17][18][19] in an aqueous phase for the GC detection.…”

“…High-performance liquid chromatography (HPLC) methods [15] and gas chromatography (GC) [16][17][18][19] were used to analyze fluoride. Fluoride is required for reaction with derivatives of F À -La3 + -alizarin complexone ternary complex [15] for HPLC detection, and the reaction with derivatives of silylation reagents such as trimethylchlorosilane and trimethylimidazolesilane [16][17][18][19] in an aqueous phase for the GC detection. The derivatized fluoride was identified based on its retention time and the peak areas of corresponding chromatographic peaks were used for fluoride quantification.…”