湿法消解-火焰原子吸收分光光度法测定煤中七种元素含量

Determination of Seven Elements in Coal by Wet Digestion-FAAS

煤中常量和微量元素是评价煤炭质量的重要指标之一。为了确定一种可操作性强的火焰原子吸收测定煤中常量及微量元素的方法，研究了硝酸-高氯酸湿法消解煤样，火焰法测定煤样中K、Na、Ca、Mg、Zn、Cu、Fe的最佳条件。实验证明，取样量0．01～O．05g，140℃湿法消解煤样，火焰原子吸收测定煤样中K、Na、Ca、Mg、Zn、Cu、Fe七种元素的含量准确性高，重复性好，方法简便；适合实验室分析测试，消耗少用时短，操作性强，可供相关测试单位参考。

The contents of major and trace elements is one of the important indices for evaluating the quality of coal. The operational method of determining elements in coal by FAAS using wet digestion is discussed in this article. It is important that how to digest the samples in the work of determining coal samples. The result proves that measured results of trace elements （Zn, Cu, Fe, Mg, Ca, K, Na） in coal by FAAS using wet digestion are precise when sample weight is set at 0.01 to 0.05 gram and digestion temperature is set as 140℃. This operational method is valid and easy to be carried out in laboratory with less consumption and less experiment time. This method can be referenced by some departments.