DDB liver drug as a novel ionophore for potentiometric barium (II) membrane sensor

Dimethyl-4,4-dimethoxy-5,6,5′,6′-dimethylene dioxy biphenyl-2,2-dicarboxylate (DDB) liver drug is used as a novel ionophore in plasticized poly (vinyl chloride) (PVC) matrix membrane sensors for barium ions. Optimum performance characteristics are displayed by membrane sensor incorporating DDB ionop...

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Veröffentlicht in:Talanta (Oxford) 2003-01, Vol.59 (1), p.161-166
Hauptverfasser: Hassan, Saad S.M, Saleh, Mohamed B, Abdel Gaber, Ahmed A, Abdel Kream, Nahed A
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Sprache:eng
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Zusammenfassung:Dimethyl-4,4-dimethoxy-5,6,5′,6′-dimethylene dioxy biphenyl-2,2-dicarboxylate (DDB) liver drug is used as a novel ionophore in plasticized poly (vinyl chloride) (PVC) matrix membrane sensors for barium ions. Optimum performance characteristics are displayed by membrane sensor incorporating DDB ionophore, potassium tetrakis(4-chlorophenyl)borate as lipophilic salt, and o-nitrophenyloctyl ether as plasticizer. The sensor exhibits a linear response over the concentration range 10 −1–10 −5 mol l −1 BaCl 2 with a Nernstian slope of 30 mV per decade and high selectivity towards Ba 2+ with respect to Li +, Na +, K +, Rb +, NH 4 +, Mg 2+, Ca 2+, Sr 2+, Mn 2+, Co 2+, Ni 2+, Cd 2+, Al 3+, La 3+, and Ce 3+ ions. The sensor response is stable over a wide pH range (4–9) and the lifetime is about 2 months. The proposed sensor is successfully applied to the determination of Ba 2+contents of some rocks.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(02)00464-2