An ion-selective potentiometric sensor for hexafluoroarsenate

作者：Kopytin A V^*; Zhukov A F; Il'in E G

来源：Journal of Analytical Chemistry, 2015, 70(4): 485-487.

DOI：10.1134/S1061934815020082

• ion-selective potentiometric sensors
• ion-selective electrode
• hexafluoroarsenate
• lithium hexafluoroarsenate
• coefficient of selectivity
• electrode function

Ion-selective potentiometric sensors (ion selective electrodes, ISEs) based on tetradecylphosphonium hexafluoroarsenate are developed for the determination of AsF (6) (-) ions. Their main parameters, such as selectivity, linearity range of response, detection limit, and also the effect of pH on the readings of electrodes are evaluated. The developed electrode demonstrated high selectivity to the AsF (6) (-) acido-complex in the presence of various anions. The detection limit goes up with increasing concentration of HF; for fluoridefree neat solutions of LiAsF6, it is 3 x 10(-7), pAsF(6) = 6.52; at the concentrations of HF 0.1 and 4 M, it is 1.5 x 10(-6) M, pAsF(6) = 5.82, and 7 x 10(-6) M, pAsF(6) = 5.15, respectively.

• 出版日期2015-4
• 单位北京化工大学