Analytical and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain.
Anal Chem. 2011 Nov 15;83(22):8810-5. doi: 10.1021/ac202070r. Epub 2011 Oct 21.
In this study, we developed a potentiometric planar strip cell based on single-walled carbon nanotubes that aims to exploit the attributes of solid-contact ion-selective electrodes for decentralized measurements. That is, the ion-selective and reference electrodes have been simultaneously miniaturized onto a plastic planar substrate by screen-printing and drop-casting techniques, obtaining disposable strip cells with satisfactory performance characteristics (i.e., the sensitivity is 57.4 ± 1.3 mV/dec, the response time is ≤30 s within the linear range from log a(K+) = -5 to -2, and the limit of detection is -6.5), no need of maintenance during long dry storage, quick signal stabilization, and light insensitivity in short-term measurements. We also show how the new potentiometric strip cell makes it possible to perform decentralized and rapid determinations of ions in real samples, such as saliva or beverages.
在这项研究中，我们开发了一种基于单壁碳纳米管的电位平面条状电池，旨在利用固态接触离子选择性电极的属性进行分散式测量。也就是说，通过丝网印刷和滴铸技术，将离子选择性电极和参比电极同时微型化到塑料平面基底上，得到具有令人满意的性能特征的一次性条状电池（即，灵敏度为 57.4 ± 1.3 mV/dec，在从 log a(K+) = -5 到 -2 的线性范围内，响应时间≤30 s，检测限为 -6.5），在长期干燥储存过程中无需维护，信号快速稳定，短期测量时对光不敏感。我们还展示了新的电位平面条状电池如何能够实现对真实样品（如唾液或饮料）中离子的分散式和快速测定。
