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Lead selective electrodes based on thioamide functionalized calix[4]arenes as ionophores

✍ Scribed by Elzbieta Malinowska; Zbigniew Brzózka; Krzysztof Kasiura; Richard J.M. Egberink; David N. Reinhoudt

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
610 KB
Volume
298
Category
Article
ISSN
0003-2670

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✦ Synopsis

Lead selective electrodes based on a di-and tetrathioamide functionalized calix [ 41 arene as ionophores were investigated. The Pb( II)-response functions exhibited almost theoretical Nernstian slopes in the activity range 10-6-10-2 M of lead ions. For both ionophores a preference for lead over other cations was observed. The best results were obtained for membranes containing the tetrathioamide derivative (ionophore 1)) potassium tetrakis( 4-chlorophenyl)borate and a-nitrophenyl octyl ether as a plasticizer. This electrode showed greatly improved selectivity over copper, zinc and cadmium ions as compared with commercial solid-state lead selective electrodes.

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