离子选择电极法测定石英砂中氟含量

Ion Selective Electrode Determination of Fluorine Content in Quartz Sand

本方法以氢氧化钾熔融,试样用水浸出熔融物后过滤,使氟与钛、铁、铜、铅等分离,调节酸度在pH6.5-7.0的柠檬酸钠-三乙醇胺介质中,以饱和的甘汞电极为参比电极,氟离子选择电极为指示电极,用电极电位仪测定氟[1]。氟含量的测定范围0.010%~0.50%。该方法易操作,测定结果稳定性和准确性好。

Sample with potassium hydroxide melting,water leaching after the melt filter,fluorine and titanium,iron,copper,lead,such as separation,triethanolamine and sodium citrate in pH6.5-7.0-medium,in a saturated calomel reference electrode was,fluorine ion selective electrodes are indicating electrode,electrode potentiometer is used to test fluorine[1].This method is suitable for the determination of fluorine content in the quartz sand,the determination of the range 0.010%~0.50%.The method is easy to operate,good stability and accuracy of determination results.