An ion-selective potentiometric sensor for hexafluoroarsenate

被引：1
|
作者：
Kopytin, A. V. [1 ]
Zhukov, A. F. [2 ]
Il'in, E. G. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
[2] Russian Mendeleev Univ Chem Technol, Moscow 125047, Russia
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2015年 / 70卷 / 04期
关键词：
ion-selective potentiometric sensors; ion-selective electrode; hexafluoroarsenate; lithium hexafluoroarsenate; coefficient of selectivity; electrode function; ELECTRODES; MEMBRANES;
D O I：
10.1134/S1061934815020082
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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.
引用
收藏
页码：485 / 487
页数：3
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