A Liquid Membrane Mercury Selective Electrode Based on 2-(N-pipyridino Methyl)-1-Cyano Cyclohexanol as a Novel Neutral Carrier

2-(N-pipyridino methyl)-1-cyano cyclohexanol was synthesized, characterized and used as an ionophore in construction of polyvinyl chloride ( PVC ) potentiometric sensor for Hg 2+ determination. The best result was obtained with membrane composition of PVC (29%), sodium tetraphenylborate as ionic add...

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Bibliographic Details
Published in:Journal of analytical chemistry (New York, N.Y.) N.Y.), 2020-10, Vol.75 (10), p.1340-1347
Main Authors: Hamid Reza Rashvand, Hajiaghababaei, Leila, Darvich, Mohammad Raouf, Sarvestani, Mohammad Reza Jalali, Miyandoab, Firouz Jaberi
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Cyclohexanol
Electrodes
Ethylenediaminetetraacetic acid
Ionophores
Liquid membranes
Mercury (metal)
Mercury compounds
Nitriles
Polyvinyl chloride
Response time
Selectivity
Sensors
Titration
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Summary:2-(N-pipyridino methyl)-1-cyano cyclohexanol was synthesized, characterized and used as an ionophore in construction of polyvinyl chloride ( PVC ) potentiometric sensor for Hg 2+ determination. The best result was obtained with membrane composition of PVC (29%), sodium tetraphenylborate as ionic additive (1%), 2-(N-pipyridino methyl)-1-cyano cyclohexanol (12%) and dibutylphthalate (58%). The designed electrode showed an acceptable Nernstian slope (29.1 mV/decade) for Hg 2+ over a wide concentration range from 5 × 10 –7 to 1 × 10 –2 M with a detection limit of 2.5 × 10 –7 M. The potential response was independent from pH in the range of 6.0–9.0 and the sensor response time was relatively short (~25 s). The sensor performance was invariable for at least 6 weeks. Electrode selectivity was evaluated by matched potential method. Finally, the proposed sensor was used as an indicator electrode in potentiometric titration of Hg 2+ with ethylenediaminetetraacetic acid and in direct determination of mercury(II) in aqueous samples with admissible accuracy and high reproducibility.
ISSN:1061-9348
1608-3199
DOI:10.1134/S106193482010010X