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石墨炉原子吸收分析具有很多优点。但用它进行痕量或超痕量分析时常常会遇到样品基体的干扰,因而,其优越性的发挥受到限制。B. V. L’vov等人都曾指出,在石墨炉中遇到的多数干扰都是由于炉内环境温度不均匀造成的。因此,L’vov提出了平台原子化技术,即将被测试样置于石墨管内的石墨平台上,由于平台主要靠石墨管的热辐射加热升温,使得石墨平台的温度滞后于管壁,延迟了试样蒸发和原子化,样品蒸发后进入一个近于恒温的气相,使分析信号很少再受基体物质的影响。
Graphite furnace atomic absorption analysis has many advantages. However, when it is used for trace or ultra-trace analysis, it often encounters the interference of the sample matrix, therefore, its superiority is limited. B. V. L’vov and others have pointed out that most of the interferences encountered in graphite furnaces are due to uneven temperature in the furnace. Therefore, L’vov proposed a platform atomization technology, that is, the sample to be tested is placed on a graphite platform in a graphite tube. Since the platform is mainly heated by heat radiation from the graphite tube, the temperature of the graphite platform lags behind the tube wall and is delayed Sample evaporation and atomization, evaporation of the sample into a nearly constant temperature of the gas phase, so that the analysis of the signal is rarely subject to the influence of the matrix material.