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Graphite Electrode Coated with a 7,16‐Dibenzyl‐1,4,10,13‐tetraoxa‐7,16‐diazacyclooctadecane‐Multiwalled Carbon Nanotube Composite as Sensor For Detection of Samarium
Author(s) -
Agrahari Sunil K.,
Srivastava Ashwini K.
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.201100097
Subject(s) - detection limit , materials science , samarium , polyvinyl chloride , electrode , carbon nanotube , ionophore , nanotube , composite number , potentiometric sensor , graphite , potentiometric titration , selectivity , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , chemical engineering , composite material , chemistry , metallurgy , chromatography , organic chemistry , catalysis , engineering , calcium
Abstract A composite multiwalled carbon nanotube polyvinyl chloride electrode based on 7,16‐dibenzyl‐1,4,10,13‐tetraoxa‐7,16‐diazacyclooctadecane (DBDA18C6) as Sm 3+ ionophore is reported. This potentiometric sensor showed a wide linear working range, 1×10 −2 –1×10 −8 M, Nernstian slope, 20.2±0.48 mV per decade and a limit of detection, 6.3±0.36×10 −9 M. It works in the pH range 2.5–8.5 and shows a good selectivity over a number of metal ions. It has been found suitable for the analysis of ores and industrial effluents. The electrode surface is characterized by FRA and AFM.