原子吸收法测定硅大致有三种方法:含量比较高的(如0.05％以上)可用直接法;含量比较低的或有干扰的,可用溶剂萃取法;另外还有间接测定法。本文介绍的是直接法测定,所使用的氧化亚氮气体是自己制备的,纯度可达95％以上。我们摸索了测定硅时氧化亚氯/乙炔的最佳流量比,并建立了在碱溶液中测定铝合金中硅及在氢氟酸和硼酸存在下测定铜合金及镍合金中硅的方法。我们对不同 Atomic absorption method for the determination of silicon in roughly three ways: higher content (such as 0.05% or more) available direct method; content is relatively low or interference, solvent extraction; indirect method. This article describes the determination of the direct method, the use of nitrous oxide gas is prepared by their own, the purity of up to 95%. We explored the best flow ratio of chlorine dioxide / acetylene for the determination of silicon and established a method for the determination of silicon in aluminum alloys in alkaline solution and the determination of silicon in copper alloys and nickel alloys in the presence of hydrofluoric acid and boric acid. We are different