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Solid-contact Ion-Selective Electrodes With Highly Selective Thioamide Derivatives of p-tert-butylcalix[4]arene for the Determination of lead(II) in Environmental Samples

Solid-contact Ion-Selective Electrodes With Highly Selective Thioamide Derivatives of p-tert-butylcalix[4]arene for the Determination of lead(II) in Environmental Samples

Marcin Guziński, Grzegorz Lisak, Tomasz Sokalski, Johan Bobacka, Ari Ivaska, Maria Bocheńska, Andrzej Lewenstam

Anal Chem. 2013 Feb 5;85(3):1555-61.

PMID: 23281967

Abstract:

Thioamide derivatives of p-tert-butylcalix[4]arene were used as ionophores in the development of solid-contact ion-selective electrodes based on conducting polymer poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS) which was synthesized by electrodeposition on the glassy carbon electrodes. The typical ion-selective membranes with optionally two different plasticizers [bis(2-ethylhexyl)sebacate (DOS) and 2-nitrophenyl octyl ether (NPOE)] were investigated. The potentiometric selectivity coefficients were determined by separate solution method (SSM) for Pb(2+) over Cu(2+), Cd(2+), Ca(2+), Na(+), and K(+). High selectivity toward Pb(2+) was obtained. By applying two conditioning protocols, a low detection limit log(a(DL)) ≈ -9 was achieved. The fabricated ion-selective electrodes were used to determine Pb(2+) concentration in environmental samples. The obtained results were compared to analysis done by inductively coupled plasma mass spectrometry (ICPMS).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP122623	Bis(2-ethylhexyl) sebacate		122-62-3	Price

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