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该文研究了用离子选择电极在柠檬酸钠-硝酸钾-三乙醇胺体系测定锡精矿中氟的测定方法,讨论了该体系pH对电位的影响、TISAB掩蔽锡量、铝量及其它干扰元素的影响,该方法测定的相对标准偏差小于1.67％,回收率为98％～102％。
In this paper, the determination of fluorine in tin concentrate by ion-selective electrode in sodium citrate-potassium nitrate-triethanolamine system was studied. The effect of pH value on potential was discussed. TISAB masked tin, aluminum and other interfering elements The relative standard deviation of this method was less than 1.67% and the recovery rate was 98% ~ 102%.