密闭微波消解液中除去氟离子的方法探讨

利用微波消解的预处理技术对土壤样品进行消解后,样液中由于氢氟酸的存在,对后续测试工作中使用的各种玻璃器皿和原子吸收光谱仪会造成损害,并且由于HF对玻璃材料的侵蚀也会造成样品的污染,为了更好的除去试液中的氟离子经过反复试验,发现采用两次少量加入高氯酸蒸发至冒烟除去过多氟离子的方法,能取得较满意的测定结果。

A Discussion on the Method of Removing the Fluoric Ions in the Microwave Digestion Fluid

After using microwave digestion preprocessing technology for soil sample decomposition,hydrofluroic acid（HF） in sample fluid would make a lot of damage on all kinds of glass material and the atomic absorption spectrometer in the subsequent test work.And the erosion of HF on glass material could also cause the pollution of samples.In order to remove fluoric ions in the test solution,through trials it was found that the method of twice adding a little perchloric acid and evaporation could remove excessive HF and get better experimental results.