Abstract
The heating characteristics and analytical performance of conventional, longitudinally heated tubes and transverse heated ETA-AAS tubes are discussed, including the influence of the tube material on the different furnace designs. From the present study it can be concluded that the best furnace material is pyrolytically coated electrographite. Analytical results obtained with the presently available totally pyrolytic graphite tubes are at best similar to pyrolytically coated tubes, whereas glassy carbon tubes cannot successfully be used at temperatures higher than 2500°C. Transverse heated tubes of totally pyrolytic graphite and transverse heated integrated contact tubes are promising because of their spatially more homogeneous temperature distribution.
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