title: Potentiometric strip cell based on carbon nanotubes as transducer layer: toward low-cost decentralized measurements.
abstract: 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.
authors.affiliation: Analytical and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain.
authors.forename: F Xavier
authors.initials: FX
authors.lastname: Rius-Ruiz
authors.forename: Gastón A
authors.initials: GA
authors.lastname: Crespo
authors.forename: Diego
authors.initials: D
authors.lastname: Bejarano-Nosas
authors.forename: Pascal
authors.initials: P
authors.lastname: Blondeau
authors.forename: Jordi
authors.initials: J
authors.lastname: Riu
authors.forename: F Xavier
authors.initials: FX
authors.lastname: Rius
mesh_terms: D004566:Electrodes / Q000191:economics; D037742:Nanotubes, Carbon / Q000737:chemistry / Q000191:economics*; D011199:Potentiometry / Q000191:economics / Q000295:instrumentation; D014159:Transducers / Q000191:economics*
chemical_list: D037742:Nanotubes, Carbon