Emulsion Doping of Ionophores and Ion-Exchangers into Ion-Selective Electrode Membranes,Analytical Chemistry

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Emulsion Doping of Ionophores and Ion-Exchangers into Ion-Selective Electrode Membranes
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-10-21 , DOI: 10.1021/acs.analchem.0c02920
Yoshiki Soda ₁ , Wenyue Gao ₁ , Jérôme Bosset ₂ , Eric Bakker ₁

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Ion-selective electrodes (ISEs) are widely used analytical devices to selectively measure ionic species. Despite significant advances in recent years, ion-selective membranes are still mostly prepared in the same manner, by preloading the selective components into a solvent that is subsequently cast into a membrane or film. This paper describes an alternative method to prepare ISE membranes by mass transfer of the sensing components from an emulsion phase. Specifically, blank (undoped) plasticized poly(vinyl chloride) (PVC) membranes mounted into an electrode body are immersed into an aqueous solution containing analyte ions and an appropriate emulsion of the desired sensing components to allow their transfer into the membrane. The concept is demonstrated with conventional membrane electrodes containing an inner solution as well as all-solid-state electrodes. It is shown to be universally useful for the realization of ISEs for K⁺, Na⁺, Ca²⁺, and NO₃^–.

中文翻译：

将离子载体和离子交换剂乳液掺杂到离子选择电极膜中

离子选择电极（ISE）是广泛用于选择性测量离子种类的分析设备。尽管近年来取得了重大进展，但离子选择性膜仍大多以相同的方式制备，方法是将选择性组分预装到溶剂中，然后将溶剂浇铸成膜或膜。本文介绍了另一种通过乳化相中传感组分的质量转移制备ISE膜的方法。具体而言，将安装在电极体中的空白（未掺杂）增塑聚氯乙烯（PVC）膜浸入含有分析物离子和所需感测组分的适当乳液的水溶液中，以使其转移到膜中。用包含内部溶液的常规膜电极以及全固态电极演示了该概念。它显示出对于K的ISE的实现普遍有用。⁺，钠⁺，钙²⁺，和NO ₃^-。

更新日期：2020-11-03

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