氟离子选择电极测定半微量矿物中的氟

单矿物半微量分析中氟的测定通常采用氟试剂比色法,此法灵敏,但费时而繁琐。离子选择电极法是新的电化学分析方法,目前氟电极测定氟已用于常规分析中,但一般岩矿分析,氟电极实测线性范围为1×10^-1M-1×10^-5M²。

SEMIMICRO-ANALYSIS OF FLUORINE IN MINERALS BY A METHOD OF FLUORINE-ION SELECTED ELECTRODE

This paper introduces a method for directly determining fluorine without any separation procedure. It can be used in presence of ethyl alcohol, and the potassium citrate as ionic strength adjustment buffer (pH 6-6.5). The determinations indicate that this method has some advantages, as high sensitivity and the Nernst linear extent up to 1×10-1M-1×10-6M, one order higher in magnitude than usual ones. Moreover, the method proposed here required less samples in amount (1-5ml.). In general, it is applicable for determining fluorine in minerals.