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首页> 外文期刊>Журнал аналитической химии >Ion-selective electrodes for the determination of salicylic acid: their operational features and application to analysis
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Ion-selective electrodes for the determination of salicylic acid: their operational features and application to analysis

机译:用于测定水杨酸的离子选择性电极:它们的操作特征和应用分析

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摘要

It is shown that the super-Nernstian slope of the electrode function and minima in the potential-pH curves observed for salicylate-selective electrodes based on liquid ion exchangers can be explained to a first approximation by taking into account the extraction of salicylic acid in the molecular form into the membrane, in which it acts as a solvating additive with respect to ion associates and free salicylate ions. The selectivity of such electrodes for salicylate ions essentially depends on pH. A procedure is proposed for the rapid evaluation of the concentration of salicylic acid impurities in sulfosalicylic acid.
机译:结果表明,基于液体离子交换剂观察到用于基于液体离子交换剂的水杨酸三酰基选择电极的电极功能和最小值的超级内部坡度可以通过考虑水杨酸的提取来解释为第一近似 分子形式进入膜中,其用作相对于离子酰亚胺和游离水杨酸盐离子的溶剂化添加剂。 这种电极用于水杨酸盐离子的选择性基本上取决于pH。 提出了一种方法,用于快速评估亚硫酸亚琥珀酸中的水杨酸杂质的浓度。

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