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Potentiometric Study of Coated Graphite Electrode and Polymeric Membrane Electrode for the Determination of Sm 3+ Ion
Author(s) -
Upadhyay Anjali,
Singh A. K.,
Jain A. K.,
Kumar Gupta Vinod,
Bandi Koteswara Rao
Publication year - 2012
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.201200050
Subject(s) - potentiometric titration , diamine , electrode , chemistry , methylene , detection limit , nuclear chemistry , graphite , membrane , electrochemistry , ion selective electrode , methylene blue , fluoride , triazine , inorganic chemistry , ion , selectivity , chromatography , medicinal chemistry , polymer chemistry , organic chemistry , photocatalysis , biochemistry , catalysis
Preliminary studies on the two Schiff bases N 2‐((3 H ‐indol‐3‐yl)methylene)‐6‐phenyl‐1,3,5‐triazine‐2,4‐diamine (L 1 ) and N 2, N 4‐bis((3 H ‐indol‐3‐yl)methylene)‐6‐phenyl‐1,3,5‐triazine‐2,4‐diamine (L 2 ) have shown that they can act as Sm 3+ selective electrodes. The performances of a polymeric membrane electrode and a coated graphite electrode based on L 2 were compared and the CGE proved to be better, as it shows a low detection limit of 1.8×10 −8 mol L −1 , a Nernstian slope of 19.6±0.4 mV decade −1 of activity with a response time of 11 s in the pH range of 3.0–9.0. The CGE was used to determine Sm 3+ in medicinal plants and soil samples. It was also used to determine fluoride ions in mouthwash samples and in toothpaste.