氟离子选择电极响应时间分析

Analysis of response times in fluoride ion selective electrode

氟离子选择电极法被广泛用于水中氟离子的测定.离子选择电极法是利用电极的电位对溶液中某种离子有选择性响应,来测定该离子的活度,从而确定这个离子的浓度.本文就氟电极对不同浓度氟标准溶液的响应时间进行分析验证,结果表明浓度越高氟电极响应时间越短."伪电位值"与最终电位间的时间差与浓度也有较高的负相关性.

The fluoride ion selective electrode method is widely used in the determination of fluorine ions in water column. Electrode potential has selective response to a certain ion in the solution, which could use to measure the ionic activity by the fluorine ion selective electrode method, subsequently calculate the concentration of the ion. In the present study, response times of fluorine electrode were analyzed in standard fluorine solution of different concentration. Results showed that the response times were shorter in higher concentration of fluorine solution. There was negative correlation of fluorine concentrations with the time lags of pseudo potential value and eventually potential value.