石英砂中二氧化硅含量的准确测定

Accurate determination of silicon dioxide in quartz sand

本文在国标法(GB/T3884.16-2014)氟硅酸钾法测定铜精矿中二氧化硅的基础上,对称样质量、熔剂、样品熔融时间、酸化所用硝酸的量、标液浓度等进行了改进。改进后的方法,适用于石英砂中二氧化硅含量的测定,测定范围0.50%~98%,该方法易操作,测定结果稳定性和准确性好。

Based on the National Standard Method(GB/T3884.16-2014)potassium fluosilicate method for the determination of silicon dioxide in copper concentrates,the quality of symmetrical sample,flux,melting time of sample,amount of nitric acid used in acidizing and concentration of standard solution have been improved.The improved method is suitable for the determination of silicon dioxide in quartz sand in the range of 0.50%~98%.The method is easy to operate and the result is stable and accurate.