光控石墨炉原子吸收光谱法测定钛的研究

Study on the Determination of Titanium by Optical Temperature Controlled Graphite Furnace Atomic Absorption Spectrometry

研究了钛原子吸收光谱的两个基本问题：钛吸收线的特征和钛原子的生成和消失．考察了石墨管的基质材料、灰化温度、原子化温度、升温技术和基体效应的影响．建立了全热解石墨管、Ca（NO3）2－NH4F混合基体改进剂，光控快速升温石墨炉原子吸收光谱测定钛的方法，特征质量为39pg/0.0044A。

The absorption spectrum line characteristics of Ti and the atomic formation and loss of Ti have been studied. The effects of graphite furnace substrate materials, ash temperature, atomic temperature, temperature technique and matrix effect have been investigated. The combined use of matrix modifier, pyrolytic graphite tube and optical temperature control for the direct determination of trace titanium by graphite furnace atomic absorption spectrometry results in a 64 fold increase in sensitivity. The characteristic mass of Ti is 39 pg/0.004A.