石墨炉原子吸收光谱分析中,吸收信号直接与原子从光路中消失的速度有关。石墨炉原子化器的主要组成部分是加热管,它多数是由普通石墨制成。那么,石墨表面的结构和物理性质,将直接影响到原子形成和消失的速度。普通石墨是多孔性的,对液体和气体有较大的渗透性。碳的另一种形态,所谓玻璃碳,它对液体和气体有很小的渗透性。普通石墨的 In graphite furnace atomic absorption spectroscopy, the absorption signal is directly related to the rate at which atoms disappear from the optical path. The main part of a graphite furnace atomizer is a heating tube, which is mostly made of ordinary graphite. Then, the structure and physical properties of the graphite surface will directly affect the rate of atom formation and disappearance. Ordinary graphite is porous and has a high permeability to liquids and gases. Another form of carbon, called glassy carbon, has little permeability to liquids and gases. Ordinary graphite