火焰原子吸收光谱法测定工业硅中的铜

Determination of Copper in Industrial Silicon by Flame Atomic Absorption Spectrometry

采用氢氟酸-硝酸分解试样，用高氯酸蒸发至冒烟除去硅；在硝酸介质（5％）中，采用火焰原子吸收光谱法于324．8nm波长处测定工业硅中铜含量。方法能有效地消除硅的干扰，测量结果相对标准偏差在5％以内，加标回收率在99．0％-102％。方法具有操作简便、快速、容易掌握、成本低的优点。

In this paper, hydrofluoric acid-nitric acid was used to decompose samples,and perchloric acid was used to remove silicon by being evaporated to smoke. In nitric acid medium （5 %）, the content of copper in industrial silicon was determined at the wavelength of 324. 8 nm by flame atomic absorption spectrometry. This method can effectively eliminate the interference of silicon. The standard recovery rates were in the range of 99.0%- 102% and the relative standard deviation was within 5%. The method has the advantages of simplicity, speediness, easiness to learn, and low-cost.