用氧选择性电池测定水中的氢化物

提出了用氟化镧单晶膜作为敏感接点组成氟选择性电池测定水中氟化物的方法,建立了测定氟化物的实验条件;确定氟离子浓度的测定范围为0.2~100mg/L,相对误差小于3%,结果表明:本方法简便、实用、快速并能满足准确度要求测定水中氟化物的方法,是一种值得推荐的新方法。

Determination of fluoride in water by means of a Fluoride-Selective Cell

This paper describes application of fluoride-selective cell with a lanthanum fluoride single crystal membrane as the sensitive membrane junction to the determination method of fluoride in water. The cell consists of two half-cells in which insert two identical reference electrodes (SCE) respectively. The concentration range of dertermination of fluoride in water by direct potentiometry is 0.2~100mg/L and relative error is less 3%. This new method of determinating fluoride in water is simpler, speed and accurate. It can be widely recommended.