Insights into Tripodal Tris(pyrazolyl) Compounds as Ionophores for Potentiometric Ammonium Ion Sensing

Colozza, Noemi (author): KTH,Kemi,Univ Roma Tor Vergata, Dept Chem Sci & Technol, Via Ric Sci, I-00133 Rome, Italy.

Flores, Gabriel A. (author): Florida Int Univ, Dept Chem & Biochem, 11200 SW 8th St, Miami, FL 33199 USA.;Florida Int Univ, Biomol Sci Inst, 11200 SW 8th St, Miami, FL 33199 USA.

Kavallieratos, Konstantinos (author): Florida Int Univ, Dept Chem & Biochem, 11200 SW 8th St, Miami, FL 33199 USA.;Florida Int Univ, Biomol Sci Inst, 11200 SW 8th St, Miami, FL 33199 USA.

Juan Angel, de Gracia Triviño, 1989- (author): KTH,Teoretisk kemi och biologi

(creator_code:org_t)

Related links:: https://doi.org/10.1...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

The decentralisation of accurate determination of the ammonium ion (NH4+) is relevant for environmental monitoring (i. e., nitrogen cycle) and certain clinical applications (e. g., kidney and liver diseases). Potentiometric ionophore-based sensors are one alternative for these purposes in terms of versatile implementation, though the potassium ion (K+) is known to be a major source of interference. We herein investigate the use of three different tripodal tris(pyrazolyl) compounds derived from 1,3,5-triethylbenzene as NH4+ ionophores. A complete set of potentiometric experiments together with theoretical simulations reveals suitable analytical performance while demonstrating a suppression of the K+ interference given the formation of an adequate cavity in the ionophore to host NH4+ over K+ in the membrane environment. The results support the use of these electrodes in the analytical detection of NH4+ in a wide range of samples with variable contents.

By the author/editor: Colozza, Noemi; Casanova, Ana; Fernandez-Perez, ...; Crespo, Gaston A ...; Flores, Gabriel ...; Kavallieratos, K ...; show more...; Juan Angel, de G ...; Ahlquist, Mårten ...; Cuartero, Maria, ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Physical Geograp ...

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