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电热原子化电热原子化技术,就是利用大电流把各种石墨管、石墨棒、金属丝、金属舟等加热到2000～3000℃的高温,使样品完全蒸发,被测元素转变成基态原子蒸气,产生共振吸收,由峰值法或积分法测量瞬时吸收信号和浓度之间的关系。在各种电热原子化器中,高温石墨炉是最有代表性的一种,目前已成为许多部门分析实验室中重要的痕量和超痕量分析手段之一。与火焰原子化法相比,石墨炉原子化法具有不少特点: 1.由于样品在石墨炉内完全气化,样品利用率接
Electrothermal atomization Electrothermal atomization technology is the use of high current to a variety of graphite tube, graphite rod, wire, metal boat and so heated to a high temperature of 2000 ~ 3000 ℃, the sample completely evaporated, the measured element into the ground state atomic vapor, Resonance absorption occurs, and the relationship between the instantaneous absorption signal and the concentration is measured by the peak method or the integral method. Among the various electrothermal atomizers, the high-temperature graphite furnace is the most representative one and has now become one of the most important trace and ultra-trace analysis tools in many departmental analytical laboratories. Compared with the flame atomization method, graphite furnace atomization method has many characteristics: 1. Since the sample is completely gasified in a graphite furnace, the sample utilization rate