间接火焰原子吸收光谱法测定水泥中硅

Indirect Flame Atomic Absorption Spectrometry for the Determination of Silicon in Cement

提出在强酸性条件下,使硅成K_2SiF_6沉淀。沉淀溶于NaOH后,再用原子吸收光谱法测钾,从而间接测出水泥中硅含量。方法灵敏快速。14次测定的标准偏差为0.23,变异系数为1.2％。

The silicon was turned into K_2SiF_8 Precipitate in strong acid medium and then let this precipitate dissolve into the solution of NaOH. After that, potassium was determined by atomic absorption spectrograph. Then, the silicon content in the cement was determined indirectly. The method is highly sensitive and fast. Standard deviation of fourteen determinations was 0.23, the coefficient of variation was 1.2%.