Premium
Thulium(III) Ions Monitoring by a Novel Thulium(III) Microelectrode Based on a S‐N Schiff Base
Author(s) -
Ganjali Mohammad Reza,
Norouzi Parviz,
AkbariAdergani Behrouz
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.200603833
Subject(s) - thulium , schiff base , detection limit , microelectrode , hydrazone , metal ions in aqueous solution , ion , chemistry , electrode , membrane , analytical chemistry (journal) , metal , inorganic chemistry , materials science , doping , chromatography , polymer chemistry , stereochemistry , optoelectronics , organic chemistry , biochemistry
This study presents for the first time development of a highly selective and sensitive thulium(III) micro‐sensor. Theoretical calculations were conducted on a S‐N Schiff base [thiophene‐2‐carbaldehyde‐(7‐methyl‐1,3‐benzothiazol‐2‐yl) hydrazone] (TCMH) in order to obtain a clue about the tendency of TCMH to Tm(III) and some other metal ions. Then, TCMH was used as a membrane‐active component to prepare a Tm(III)‐selective polymeric membrane microelectrode. In line with the resulting data, the electrode exhibits a Nernstian response toward Tm(III) ions for a very wide concentration range (1.0×10 −11 –4.0×10 −6 M) with a detection limit of 1.0×10 −11 (ca. 1.5 ppt) and a very fast response time in the whole concentration range (<5 s). In addition, the results showed that the certain microelectrode could be applied in the pH range of 4.0–11.0 with a usage of more than one month without any considerable potential divergence.