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由于石墨能耐高温,而且性能稳定,因此在许多分析仪器中得到应用。例如在分析金属中氧时,它产生的高温能将各种样品中的氧气析出,在还原气体中生成一氧化碳,通过分析一氧化碳,可以测定金属中的氧含量。在原子吸收分光光度计中,石墨炉作为无火焰原子化器,可以分析难于原子化的高温金属。石墨炉已经成为原子吸收分光光度法的一个重要手段。但是石墨炉的内阻很小,加热是直接通过大电流实现的。石墨炉的热惯性也不大,瞬时
Because graphite can withstand high temperatures and has stable properties, it is used in many analytical instruments. For example, in the analysis of oxygen in metals, the high temperature it generates precipitates oxygen in various samples and generates carbon monoxide in the reducing gas. By analyzing carbon monoxide, the oxygen content in the metal can be determined. In atomic absorption spectrophotometer, graphite furnace as a flameless atomizer, can analyze difficult to atomize the high temperature metal. Graphite furnace has become an important method of atomic absorption spectrophotometry. However, the internal resistance of graphite furnace is very small, heating is achieved directly by high current. Graphite furnace thermal inertia is not large, instantaneous