Optimization of fluorine determination via the molecular absorption of gallium mono-fluoride in a graphite furnace using a high-resolution continuum source spectrometer

A fast and accurate method for the determination of total and soluble fluorine in toothpaste using high-resolution graphite furnace molecular absorption spectrometry and its comparison with established techniques

“…Examples for exploring HR-CS MAS for fluorine determination in flames and graphite furnaces were published by Huang et al [33] and Heitmann et al [34], respectively. The method for fluorine determination using the molecular absorption of the gaseous gallium monofluoride GaF formed in a graphite furnace was recently optimized by our group, and a limit of detection of 5.2 pg F was reported [35].…”

Determination of Trace Metals in Waste Water and Their Removal Processes

“…F, Cl, Br, I, S, P can be determined by their hyperfine structured diatomic molecular absorbances. There are various papers for fluoride determination by GaF [36], SrF [37], AlF [38], CaF [39], chloride by AlCl [40], InCl [41], bromide by AlBr [42], CaBr [43], sulfur by CS [44], phosphorus by PO [45]. …”

Molecule Formation Mechanisms of Strontium Mono Fluoride in High-Resolution Continuum Source Electrothermal Atomic Absorption Spectrometry

“…To further prove the gas-phase combination reaction, even in the case of SrF2 formation, Sr and F were injected on one side of the platform and Ga, which is known to be a very effective molecule forming element with F, [1][2][3] was injected on the other side. It can be assumed that during the drying step, solid-phase products of Sr and F, e.g.…”

“…For this purpose, Ga, [1][2][3] Ca, 4 Al, 5 Sr 6 etc. were used to form the diatomic molecules of halogens, whereas CS rotational lines formed in the presence of excessive carbon in flames and a graphite furnace were benefited for the determination of S. 7,8 Various mechanisms can be proposed for the formation of diatomic molecule of halogens in a graphite furnace: (i) a salt of analyte is formed upon interaction with the molecule-forming elements during the drying step, which is later decomposed at elevated temperature to produce a diatomic molecule and/or (ii) the atoms of the analyte and the molecule forming element are combined in the gas phase to form the diatomic molecule.…”