FAAS Determination of Microamounts of Metal Elements in Coal and Coal-based Activated Carbon

A method for determination of 7 metal elements (i.e.,copper,zinc,manganese,iron,calcium,magnesium and tin) of micro amounts in coal and coal-based activated carbon by FAAS was proposed.The sample of coal or coal-based activated carbon was pulverized and ashed as described in GB/T 212-1991.The ashed sample was treated with HClO4 and HF,evaporated to near dryness and then dissolved with HCl(1+1).The above mentioned metal elements in hydrochloric acid solution were determined by FAAS according to the working conditions of instrument as described.Tests for precision and recovery were performed,giving values of RSD′s (n=6) for all the 7 elements less than 1%,and values of recovery in the range of 96.7% to 100.9%.