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随着钢质量的提高和对微量元素行为的深入探讨,石墨炉原子吸收法在钢铁中微量元素分析方面的应用与日俱增。但对一些熔点高和易于生成碳化物、难于原子化的元素,例如钼的直接测定方法迄今尚未见报导。这是因为在测定钼时,大量铁的存在不仅能产生很强的背景吸收,而且对钼有严重的负干扰。因此通常均采用常规的有机溶剂萃取或离子交换法进行分离,以消除其干扰和影响,但操作繁琐。为寻求一种简便的分离方法,根据石墨炉原子吸收法的特点,试验了采用静态阳离子交换的可能性,取得了较好效果。既消除了铁的
With the improvement of the quality of steel and the further study on the behavior of trace elements, the application of graphite furnace atomic absorption spectrometry in the analysis of trace elements in steel has been increasing day by day. However, there are no reports of direct methods for the direct determination of some elements that have a high melting point and are prone to carbides and are difficult to atomize, such as molybdenum. This is because in the determination of molybdenum, the presence of a large amount of iron not only produces a strong background absorption, but also has a serious negative interference with molybdenum. Therefore, they are usually separated by conventional organic solvent extraction or ion exchange method to eliminate the interference and influence, but the operation is cumbersome. In order to find a simple separation method, the possibility of using static cation exchange was tested according to the characteristics of graphite furnace atomic absorption spectrometry, and good results were obtained. Not only eliminated the iron