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Chromium(III) Potentiometric Sensor Based on Para‐Tertiary ‐Butyl Calix[4]arene
Author(s) -
Bagheri Sadeghi Hayedeh,
Tamaddon Atefeh,
Afifinia Hadi,
Almasian Nasim,
Bozorgvar Fatemeh,
Mollaei Somayeh
Publication year - 2011
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/elan.201100220
Subject(s) - potentiometric titration , chromium , dibutyl phthalate , plasticizer , chemistry , ionophore , detection limit , electrode , inorganic chemistry , potentiometric sensor , phthalate , ion selective electrode , membrane , nuclear chemistry , selectivity , chromatography , organic chemistry , biochemistry , catalysis
A new chromium(III) PVC membrane sensor incorporating p ‐ tertiary ‐butyl calix[4]arene as ionophore, potassium tetrakis as additive and dibutyl phthalate (DBP) as plasticizer was constructed. The electrode exhibited an excellent potentiometric response over a wide concentration range of 1.0×10 −7 –1.0×10 −1 M with a Nernstian slope of 20±0.5 mV per decade. The detection limit was 5.0×10 −8 M. The electrode showed a better performance over a pH range of 3.0–8.0, and had a short response time of about <15 s.The electrode was successfully applied to potentiometric titration of Cr (III) with EDTA and for direct determination of chromium(III) in waste water.