原子吸收光谱法测定锡精矿中的氧化钙及氧化镁

建立了火焰原子吸收光谱法测定锡精矿中CaO及MgO量的方法。所建立的方法CaO及MgO的特征浓度分别为0．087μg／mL，0．0034μg／mL；检出限分别为0．022μg／mL，0．0028μg／mL；标准曲线的线性相关系数均大于0．999；测定范围分别为0．050％-7．50％，0．010％-2．00％；对11个代表样及2个标样进行考察，精密度分别为0．7％-11．1％，2．5％～10．5％；样品加标回收率分别为91．5％～102．7％，98．6％～102．7％。

Determination of Calcium Oxide and Magnesium Oxide in Tin Concentrate by Atomic Absorption Spectrometry

The determination method of calcium oxide and magnesium oxide in tin concentrate by flame atomic absorption spectrometry is established. In the established method, the characteristic concentration of CaO and MgO were 0. 087μg/mL and 0. 0034μg/mL respectively; the detection limit were 0. 022μg,/mL and 0. 0028 μg/mL respectively; The linear correlation coefficient of standard curve were more than 0. 999; the determination range were 0.050% -7.50% and 0.010%- 2.00% respectively; 11 representative samples and 2 standard samples were researched, and the accuracy were 0. 7% -11.1% and 2. 5% - 10. 5% respectively; the recovery of stand- ard addition of samples were 91.5% - 102.7%, 98.6% - 102.7% respectively.