Flame atomic absorption spectrometry study of determining element contents in soil in coal mining area

FAAS(Flame Atomic Absorption Spectrometry) has already been widely used to many fields.However,due to several problems such as too many samples required,too long digested time and more interferers during the FAAS experiment,its use in practice is limited.In order to solve these problems,a new method using the FAAS to determine Zn、Cu、Fe、Mg、Ca、K and Na,seven element contents of soil samples in coal mining area after digested by HNO₃-HClO₄ is established in this paper after doing trial and error,combining with the characters of these samples.The method is easy and rapid with satisfied results.The relative standard deviations of these soil samples from Huainan coal mining area are less than 2.9%,while the recoveries of the additional standard are in the range of 97.3%~112.5%.