用氟化镧膜选择性电池测定水中氟化物的研究

Study on determination of fluoride in water by flulride-selective cell

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～ 10 0mg·L- 1 ,相对误差小于 3% ,结果表明 ,此方法简便、实用、快速并能满足准确度要求 ,这种测定水中氟化物的方法 。

Describes application of fluoride-selective cell with a lantnanum fluoride single crystal membrane as the sensitive membrane junction to the determination method of fluoried in the water.The concentration range of dertermination of fluoride in the water by direct potentiometry is 0.2～100 mg/L and relative error is less 3%.This method is simpl,fast and accurate,and can be widely using.