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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer-Verlag

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DOI

10.1016/0020-711x(92)90139-r

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1433-0768

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Recovery of nanomolar detection limit of solidcon

Authors: Grzegorz Lisak Johan Bobacka Andrzej Lewenstam
Publish Date: 2012/04/05
Volume: 16, Issue: 9, Pages: 2983-2991
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Abstract

Solidcontact Pb2+selective electrodes Pb2+ISEs were prepared by using polybenzopyrene doped with eriochrome black T as solid contact material and a conventional polyvinyl chloride membrane with lead ionophore IV as selective compound Nernstian response down to 10−9 mol dm−3 Pb2+ was obtained by careful control of the electrode conditioning process Furthermore the response at lowest concentrations was retained by exposing the solidcontact Pb2+ISEs to a solution containing Na2EDTA Finally the solidcontact Pb2+ISEs were used in the determination of lead in a synthetic sample pPb2+ = 740 The analysis of the sample was done with direct potentiometry pPb2+ = 764 ± 011 and single standard addition method pPb2+ = 727 ± 007 These results were in good agreement with those obtained by inductively coupled plasma–mass spectrometry pPb = 734 The renewable response of the Pb2+ISEs at low concentrations opens interesting possibilities when dealing with tracelevel measurements of Pb2+The authors are grateful to Paul Ek for performing ICP–MS measurements and MSc Michał Wagner for help in the polymerization of polybenzopyrene films The Graduate School of Chemical Sensors and Microanalytical Systems CHEMSEM GL and the Polish Ministry of Science and Higher Education grant N507234340 AL are acknowledged for financial support This work is a part of activities at Åbo Akademi Proces Chemistry Centre within the Finnish Centre of Excellence Programme 2000–2011 of the Academy of Finland

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