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Nickel(II) Ion‐Selective Electrode Based on 2‐Methyl‐4‐(4‐methoxy phenyl)‐2,6‐diphenyl‐2 H ‐thiopyran
Author(s) -
Ganjali Mohammad Reza,
Fathi Mohammad Reza,
Rahmani Hossein,
Pirelahi Hooshang
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200010)12:14<1138::aid-elan1138>3.0.co;2-x
Subject(s) - potentiometric titration , nickel , chemistry , membrane , detection limit , inorganic chemistry , electrode , alkali metal , ion , thiopyran , titration , ion selective electrode , acetonitrile , analytical chemistry (journal) , selectivity , chromatography , organic chemistry , catalysis , biochemistry
A new PVC membrane electrode for nickel ion based on a recently synthesized 2‐methyl‐4‐(4‐methoxy phenyl)‐2,6‐diphenyl‐2 H ‐thiopyran as membrane carrier was prepared. The sensor exhibits a Nernstian response for Ni 2+ over a wide concentration range (5×10 –2 –2×10 –5 M) with a limit of detection of 9×10 –6 M. The response time of the sensor is ca. 10 s and the membrane can be used for more than 8 weeks without observing any deviation. The proposed membrane sensor shows excellent discriminating ability towards Ni 2+ ion in comparison to several alkali, alkaline earth, transition and heavy metal ions. It was used as an indicator electrode in potentiometric titration of Ni ions in both water and 85% acetonitrile solutions.