ISIDORE, a probe for in situ trace metal speciation based on Donnan membrane technique with related electrochemical detection part 1: Equilibrium measurements.
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.
Université de Pau et des Pays de l'Adour, CNRS UMR 5254, LCABIE, 64000 Pau, France. Electronic address: corinne.parat@univ-pau.fr.
Corinne
C
Parat
Université de Lorraine/ENSG, CNRS UMR 7360, LIEC, 54500 Nancy, France.
J P
JP
Pinheiro
Cadmium; Donnan membrane technique; Lead; On-site monitoring; Screen-printed electrode; Zinc