Analytical Sciences

Temporal Variation in Gas Temperature at the Atomization Stage in Several Types of Graphite Furnaces for Atomic Absorption Spectrometry

Tetsuya ASHINO,* Haruki SHIMABUKURO,** Shun MORIMOTO,* and Kazuaki WAGATSUMA*

*Institute for Material Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
**Ryukyu-Cement Co. Ltd., 2-2-2 Irizima, Urasoe, Okinawa 901-2023, Japan

In order to compare and evaluate the atomization process occurring in several types of graphite furnaces for atomic absorption spectrometry, the authors estimated temporal variations in the gas temperature by using a two-line method under the assumption of a Bolzmann distribution. The atomization furnaces employed were a graphite tube, a graphite tube coated with pyrolitic carbon, a graphite tube with a platform and a graphite cup. Differences in the temporal variation in the gas temperature among these graphite furnaces were observed.

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