氟硅酸钾容量法测定磷矿石中的活性二氧化硅

The application of potassium fluosilicate volumetric method for determination of active silicon dioxide content in phosphate ore

介绍用硫磷混合酸分解样品．采用氟硅酸钾容量法测定磷矿石的活性二氧化硅，方法简单快速。结果表明，该方法的SD〈0．03；CV（3．0，加标回收率在96．4％-104．8％，适合磷矿石中活性二氧化硅的测定。

This paper introduces a method for determination of the active silicon dioxide content by potassium fluosilieate volumetric method which uses a mixture of sulphuric acid and phosphoric acid to solve the phosphate ore sample. This method is simple and quick. The results of experiments shows that the SD of this method is below 0.03 and the CV of this method is below 3.0, recovery was in the range of 96.4 -104.8%. This method is suit for measuring the active silicon dioxide content in phosphate ore.