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Highly Selective and Sensitive Membrane Sensors for Copper(II) Ion Based on a New Benzo‐Substituted Macrocyclic Diamide 6,7,8,9,10‐Hexahydro‐2H‐1,13,4,7,10‐benzodioxatriazacyclopentadecine‐3,11(4H,12H)‐dione
Author(s) -
Shamsipur Mojtaba,
Mizani Farhang,
Saboury Ali Akbar,
Sharghi Hashem,
Khalifeh Reza
Publication year - 2007
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.200603768
Subject(s) - potentiometric titration , chemistry , copper , titration , membrane , alkali metal , inorganic chemistry , chelation , electrode , electrochemistry , metal ions in aqueous solution , ion , ion selective electrode , metal , selectivity , organic chemistry , catalysis , biochemistry
Novel PVC membrane (PME) and coated graphite (CGE) Cu 2+ ‐selective electrodes based on 5,6,7,8,9,10‐hexahydro‐2 H ‐1,13,4,7,10‐benzodioxatriazacyclopentadecine‐3,11(4 H ,12 H )‐dione are prepared. The electrodes reveal a Nernstian behavior over wide Cu 2+ ion concentration ranges (1.0×10 −7 –1.0×10 −1 M for PME and 1.0×10 −8 –1.0×10 −1 M for CGE) with very low limits of detection (7.8×10 −8 M for PME and 9.1×10 −9 M for CGE). The potentiometric responses are independent of the pH of the test solutions in the pH range 2.7–6.2. The proposed electrodes possess very good selectivities for Cu 2+ over a wide variety of the cations including alkali, alkaline earth, transitions and heavy metal ions. The practical utility of the proposed electrodes have been demonstrated by their use in the study of interactions between copper ions and human growth hormone (hGH) in biological systems, potentiometric titration of copper with EDTA and determination of copper content of a sheep blood serum sample and some other real samples.