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本文目的是拟定硅酸盐矿石和铝钒土中测定 Si、Ti、Al、Fe、Ca、Mg 和 Mn 的原子吸收方法。原子吸收法使用日立207型单光束原子吸收光谱仪。该仪器的特点是光束两次通过火焰,光线几乎全部通过火焰中心部分。根据数据判断,Fe、Mg 和 Mn 的检出极限用 C_2H_2/Air 火焰比用 C_2H_2/N_2O 火焰要高1—9倍。这可解释为这些元素在 C_2H_2/Air 火焰中得到充分原子化,稳定性比较好。Si、Al 和 Ti 实际上只能应用 C_2H_2/N_2O 火焰进行测定。利用富燃的 C_2H_2/N_2O 火焰,
The purpose of this paper is to develop an atomic absorption spectrometry for the determination of Si, Ti, Al, Fe, Ca, Mg and Mn in silicate ores and bauxite. Atomic absorption method Hitachi 207 single beam atomic absorption spectrometer. The feature of this instrument is that the light beam passes through the flame twice, with almost all the light passing through the center of the flame. Judging from the data, the detection limit of Fe, Mg and Mn is 1-9 times higher than that of C 2 H 2 / Air flame than that of C 2 H 2 / N 2 O flame. This can be explained by the fact that these elements are fully atomized in the C 2 H 2 / Air flame with good stability. Si, Al and Ti can only be measured by C 2 H 2 / N 2 O flame. The use of rich combustion C_2H_2 / N_2O flame,