Abstract
Membranes for optically sensing Ag + and Hg 2+ based on plasticized poly(vinyl chloride) (PVC) containing a metal ion-selective ionophore, a hydrogen ion-selective chromoionophore, and lipophilic anionic sites are presented. Different dithiocarbamate ionophores have been used to develop novel optical sensors for environmental analysis. Optode membranes based on the ionophore methylene bis(diisobutyldithiocarbamate) (MBDiBDTC) reversibly respond to Ag + and Hg 2+ and show extremely high selectivities over Li + , Na + , K + , Mg 2+ , Cu 2+ , Cd 2+ , and Pb 2+
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