论文部分内容阅读
早在1961年就开始应用有机溶剂萃取法于原子吸收光谱,十多年来,此方法已得到广泛的应用,特别引起人们注意的是直接将有机萃取相喷到火焰中以测定各种金属元素,这是由于其具有下列的优点: 1.直接将有机相喷到火焰中进行测定,一般金属的灵敏度较其在水相时提高约2-8倍。 2.起到富集被测元素的作用,相对灵敏度又可提高约1-2个数量级。 3. 分离干扰元素。 4. 分离大量的盐类,便于任何燃烧器操作。但是采取萃取步骤后,分析所需时间相应延
As early as 1961 began to apply organic solvent extraction atomic absorption spectrometry, more than a decade, this method has been widely used, of particular note is the direct organic extraction phase sprayed into the flame to determine the various metal elements , Which is due to its advantages as follows: 1. The organic phase is directly sprayed into the flame for determination. Generally, the sensitivity of the metal is about 2-8 times higher than that of the aqueous phase. 2. To enrich the role of the measured elements, the relative sensitivity can be increased by about 1-2 orders of magnitude. 3. Separation of interference elements. 4. Separation of large quantities of salt for any burner operation. However, after taking the extraction step, the time required for the analysis is extended accordingly