Molecular non-thermal excitation spectrometry (MONES): a procedure for the determination of non-metals using diatomic molecules in the non-thermal (FANES) atomiser. Part 1. Determinations of fluoride and chloride ions by magnesium fluoride and magnesium chloride MONES. Plenary lecture

Abstract

A method for the determination of the halides F^– and Cl^– by non-thermal excitation of MgF and MgCl molecules in a glow discharge established in a hot graphite tube (2000 °C, 2 kPa) has been developed. The MgX molecules are formed by simultaneous evaporation of Mg- and F-containing species (Mg being the additive and F the sample). The detection limits are 0.5 ng of fluoride and 0.24 ng of chloride, respectively. The method is called ETE-MONES (molecular non-thermal excitation spectrometry with electrothermal evaporation) by analogy with the FANES technique (furnace atomisation non-thermal excitation spectrometry).