Abstract

The electroanalytical characteristics of an ion-selective electrode (ISE) with a membrane based on a supramolecular polymer composition containing polyvinyl chloride, o-nitrophenyl octyl ether plasticizer, tetradecyphosphonium pertechnetate ionophore, and a lipophilic additive of tetradecylphosphonium tetraphenyborate are studied. The limit of detection for the ISE in aqueous solutions containing KTcO₄ was 2 × 10^–7 M and the slope of the electrode function at 20°C was 58 ± 1 mV/pTc\({\text{O}}_{4}^{ - }\). Potentiometric selectivity coefficients were determined for various anions. A correlation between the hydration energy ΔG_hydr and selectivity coefficients calculated by the method of mixed solutions is observed. It was found that a change in the pH of the solution in the range 2–12 slightly affects the electrode potential when the concentration of Tc\({\text{O}}_{4}^{ - }\) in the analyzed solution is 1 × 10^–6–0.001 M. The behavior of the electrodes in strongly acidic solutions was studied.

中文翻译：

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离子选择电极测定高tech酸根离子

摘要

研究了基于离子分子的离子选择电极（ISE）的电分析特性，该膜基于包含聚氯乙烯，邻硝基苯基辛基醚增塑剂，高dec酸十四烷基phosph离子载体和四phen基硼酸十四烷基phosph的亲脂性添加剂的超分子聚合物组合物。含KTcO _4的水溶液中ISE的检出限为2×10 ^–7 M，电极功能在20°C时的斜率为58±1 mV / pTc \（{\ text {O}} _ {4 } ^ {-} \）。确定各种阴离子的电位选择系数。水合能量ΔG _hydr之间的相关性观察了用混合溶液法计算的选择性系数。结果发现，在2-12范围内的溶液的pH的变化影响小的电极电位时Tc的浓度\（{\文本{ö}} _ {4} ^ { - } \）在所分析的溶液为1×10 ^–6 –0.001M。研究了电极在强酸性溶液中的行为。