Calculation of the dynamic temperature characteristics of a heated graphite tube used in electrothermal atomic absorption measurements |
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| Authors: | HGC Human NP Ferreira CJ Rademeyer PK Faure |
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| Institution: | National Physical Research Laboratory, CSIR. P.O. Box 395, Pretoria 0001, South Africa;Technikon Pretoria, 420 Church Street, Pretoria 0001, South Africa;Rand Afrikaans University, P.O. Box 524, Johannesburg, South Africa |
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| Abstract: | A method and computer program were developed for calculating the temperature of any part of a graphite furnace tube at any instant of time after onset of the heating cycle. Results for tubes of the Massman design show large differences in spatial temperature distributions during and at the end of the heating cycle when equilibrium is reached. When constant current is applied to contoured tubes, greater heating rates at the tube centres are obtained than with standard tubes. |
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