Ag+-sensitive membranes for electrochemical and optical sensors

Details Ag+-sensitive membranes for electrochemical and optical sensors Ag+-sensitive membranes for electrochemical and optical sensors

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3730...83w&link_type=abstract

Proc. SPIE Vol. 3730, p. 83-88, Optoelectronic and Electronic Sensors III, Antoni Nowakowski; Bogdan Chachulski; Eds.

Computer Science

Scientific paper

The paper is focused on lipophilic acyclic thioethers as neutral ionophores for heavy-metals cations. Membranes based on plasticized PVC containing these carriers exhibited high selectivity toward silver cations over transition metal ions (log KAgM < -4.5) except mercury ions. Membrane containing the ionophore II (with l-naphtyl pendant group) was used to design silver-selective ISE which shows linear response in the range 3 - 6 pAg with a slope of 51.5 mV/pAg. The addition of the pH chromoionophore to the membrane composition allowed to obtain a silver-sensitive optrode membrane, responding in the concentration range 0.01 - 1 mM Ag+.

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