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

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• 作者：Marcin Guzi艅ski ; Grzegorz Lisak ; Tomasz Sokalski ; Johan Bobacka ; Ari Ivaska ; Maria Boche艅ska ; Andrzej Lewenstam
• 刊名：Analytical Chemistry
• 出版年：2013
• 出版时间：February 5, 2013
• 年：2013
• 卷：85
• 期：3
• 页码：1555-1561
• 全文大小：309K
• 年卷期：v.85,no.3(February 5, 2013)
• ISSN：1520-6882

文摘

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 Pb²⁺ over Cu²⁺, Cd²⁺, Ca²⁺, Na⁺, and K⁺. High selectivity toward Pb²⁺ was obtained. By applying two conditioning protocols, a low detection limit log(a_DL) 鈮?鈭? was achieved. The fabricated ion-selective electrodes were used to determine Pb²⁺ concentration in environmental samples. The obtained results were compared to analysis done by inductively coupled plasma mass spectrometry (ICPMS).