Molekülabsorptionsspektrometrie bei elektro-thermischer verdampfung in einer graphitrohrküvette

Molecular absorption with electrothermal volatilization in a graphite tube. Part 3. A study of the determination of fluoride traces by A1F, GaF, InF and T1F molecular absorption . The use of the molecular absorption of thermally stable molecules such as AlF, GaF, InF and TlF, generated in a normal graphite tube, is assessed for determinations of fluoride. Optimal experimental conditions are discussed. The presence of Na + ions increases the signals. The influence of Na + ions and of other substances is discussed. The sensitivities (0.01 absorbance) are 0.4 ng F - for AlF, 0.8 ng F - for GaF, and 1.1 ng F - for InF.