【摘要】 <正> 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。更多还原

【Abstract】 This paper studied the matrix interference of cadmium and palladium in platform furnace by slope ratio method. The results showed that slope ratio method is simple and effective for studying the interference from complex matrix. Cadmium in geochemical samples can be determined directly by platform technique with NH₄H₂PO₄ as matrix modifier, The interference of noble metals to palladium in geochemical samples can be eliminated by using the extraction system of MBTMIBK.更多还原