A ω-mercaptoundecylphosphonic acid chemically modified gold electrode for uranium determination in waters in presence of organic matter

Daniele Merli; Stefano Protti; Matteo Labò; Maria Pesavento; Antonella Profumo

doi:10.1016/j.talanta.2016.01.032

A ω-mercaptoundecylphosphonic acid chemically modified gold electrode for uranium determination in waters in presence of organic matter

Talanta. 2016 May 1:151:119-125. doi: 10.1016/j.talanta.2016.01.032. Epub 2016 Jan 15.

Authors

Daniele Merli¹, Stefano Protti², Matteo Labò², Maria Pesavento², Antonella Profumo²

Affiliations

¹ Dipartimento di Chimica, Università degli Studi di Pavia, 27100 Pavia, Italy. Electronic address: daniele.merli@unipv.it.
² Dipartimento di Chimica, Università degli Studi di Pavia, 27100 Pavia, Italy.

PMID: 26946018
DOI: 10.1016/j.talanta.2016.01.032

Abstract

A chemically modified electrode (CME) on a gold surface assembled with a ω-phosphonic acid terminated thiol was investigated for its capability to complex uranyl ions. The electrode, characterized by electrochemical techniques, demonstrated to be effective for the determination of uranyl at sub-μgL(-1) level by differential pulse adsorptive stripping voltammetry (DPAdSV) in environmental waters, also in presence of humic matter and other potential chelating agents. The accuracy of the measurements was investigated employing as model probes ligands of different complexing capability (humic acids and EDTA).

Keywords: Chemically modified electrodes; Electrochemical sensors; Natural waters; Self assembled monolayer; Uranyl ion; ω-Mercaptoundecylphosphonic acid.