A comparison of furnace atomic nonthermal excitation spectrometry (FANES) with other atomic spectroscopic techniques
The efficiency of various atomization systems is estimated, showing that electrothermal atomizers give the best values. The possibilities of combining atomizers and excitation devices to form an atomic emission source with independent optimization of evaporation/atomization and excitation processes are discussed. This demand and the physical conditions in electrothermal atomizers as well as in low noise excitation devices led to the FANES approach for multielement atomic emission analysis. The processes taking place in a FANES source which determine the temporal behavior of the signal and the upper limit for the excitation of atomic and ionic levels are discussed in detail. Compared to other techniques of multielement analysis FANES has a considerably higher sensitivity, allowing sub- μg/l determinations in μl-samples. On average, the detection limit of FANES is 250-fold better than that of the ICP.