离子选择性电极法直接测定蔬菜中的微量氟

Directly Determination of Fluoride in Vegetables Digested in using Ion-seletive Electrode

研究了用浓硫酸酸化处理蔬菜样品,直接在含有硫酸酸介质的一定总离子强度调节缓冲混合液（TI-SAM）中测定氟含量的离子选择性电极方法。方法线性范围在1.00×10-2~1.00×10-6mol/L,检测下限为15.1μg/L,操作简单快速,结果满意。

An fluoride ion - selective electrode （ISE） assay is developed for the determination of fluoride in the vegetables, which are digested firstly in H2SO4 solution and detected directly in the total ionic strength adjusting mixture （TISAM） solution. The linear range for the determination of fluoride is between 1.00 × 10-2 - 1.00×10-6 mol/L, and the detection limit of the method is 15.1μg L. This method is used for the determination of trace fluoride in the vegetables with satisfied results.