【摘要】 <正> 石墨炉内的温度及其分布,是石墨炉原子吸收法的基础资料。它对阐明原子化过程、了解干扰机理和探求克服干扰的方法,具有重要的意义。但是,目前有关这方面的资料所见很少,这种状况显然与准确测量温度所存在的困难是有关的。本文用多种方法测量了石墨炉及炉内石墨探针的温度及其分布,并利用这些资料阐明了探针原子化技术有效克服基体干扰和提高灵敏度的原因。更多还原

【Abstract】 Temperature and its distribution inside graphite tube furnace is basical data for graphite furnace atomic absorption spectrometry. In this paper, these data have been measured by several methods. The experimental results shown that graphite tube furnace exists non-equitemperature property in time and space during its increasing temperature. A graphite probe was inserted into graphite tube furnace after the latter had been reached constant temperature. The increasing temperature rate of graphite probe, in average, is 8700℃/s and 4500℃/s respectively during initial 0.25s and 0.5s of heating probe. This high increasing temperature rate is very advantageous to freedom from matrix interference and realization of constant temperature atomization.更多还原