论文部分内容阅读
火焰原子吸收法由于试样被载气和燃料气体大量稀释,使测定的灵敏度受到限制。但采用高温石墨炉无火焰原子吸收法克服了这一缺点。注入的试样溶液在3000℃左右的高温下达到原子化,灵敏度较火焰法最大可高10~4倍。有的资料介绍用火焰发射法测定个别稀土元素如La、Eu、Nd等、也有用N_2O-C_2H_2火焰原子吸收法测定部分稀土元素的,而对全部稀土分量及含量低的均未解决。
Flame atomic absorption method due to the sample was a large number of carrier gas and fuel gas dilution, the determination of the sensitivity is limited. However, the use of high temperature graphite furnace flame atomic absorption method to overcome this shortcoming. The injected sample solution reaches atomization at a high temperature of about 3000 ° C, and the sensitivity is 10 to 4 times higher than that of the flame method. Some information describes the use of flame emission method for the determination of individual rare earth elements such as La, Eu, Nd, also useful N_2O-C_2H_2 flame atomic absorption method for the determination of some rare earth elements, and all of the rare earth content and low content are not resolved.