ISIDORE, a probe for in situ trace metal speciation based on Donnan membrane technique with related electrochemical detection part 1: Equilibrium measurements

Corinne Parat (1, 2, 3) , J.P. Pinheiro (4)

1 LCABIE - Laboratoire de Chimie Analytique Bio-Inorganique et Environnement
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
3 IPREM - Institut pluridisciplinaire de recherche sur l'environnement et les matériaux
4 LIEC - Laboratoire Interdisciplinaire des Environnements Continentaux

This work presents the development of a new probe (ISIDORE probe) based on the hyphenation of a Donnan Membrane Technique device (DMT) to a screen-printed electrode through a flow-cell to determine the free zinc, cadmium and lead ion concentration in natural samples, such as a freshwater river. The probe displays many advantages namely: (i) the detection can be performed on-site, which avoids all problems inherent to sampling, transport and storage; (ii) the low volume of the acceptor solution implies shorter equilibration times; (ii) the electrochemical detection system allows monitoring the free ion concentration in the acceptor solution without sampling.

Mots clés: Donnan membrane technique; Screen-printed electrode; Zinc; Lead; Cadmium; On-site monitoring

Domaines: Chimie; Chimie analytique

Corinne Parat, J.P. Pinheiro. ISIDORE, a probe for in situ trace metal speciation based on Donnan membrane technique with related electrochemical detection part 1: Equilibrium measurements. Analytica Chimica Acta, 2015, 896, pp.1-10. ⟨10.1016/j.aca.2015.07.016⟩. ⟨hal-01248660⟩