In the determination of Cr, Ni, Cu and Mn in alloy steel samples by flame AAS,the precise results are difficult to obtain because of the matrix-element Fe interference.

• 火焰原子吸收法（即AAS法）测量钢样中铬、镍、铜、锰的含量，由于基体中大量存在铁元素的干扰．影响结果的准确性。