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Novel Lu 3+ Carbon Paste Electrode Based on Functionalized Multiwalled Carbon Nanotubes
Author(s) -
Tamaddon Atefeh,
Amiri Rahebeh,
Hazini Fatemeh
Publication year - 2014
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.201300388
Subject(s) - lutetium , electrode , materials science , carbon paste electrode , carbon nanotube , carbon fibers , graphite , chemical engineering , analytical chemistry (journal) , electrochemistry , inorganic chemistry , nanotechnology , cyclic voltammetry , composite material , chemistry , organic chemistry , composite number , engineering , yttrium , metallurgy , oxide
A novel carbon paste ion selective electrode for determination of trace amount of lutetium was prepared. Modified (functionalized) multiwalled carbon nanotubes (f‐MWCNTs) were used for improvement of a lutetium carbon paste sensor response. MWCNTs have a good conductivity which helps the transduction of the signal in carbon paste electrode. In this work it is shown that introducing certain functional groups on MWCNTs can improve the electrode signals. The electrode composition of 20 % paraffin oil, 56 % graphite powder, 18 % ionophore and 6 % f‐MWCNTs showed the stable potential response to Lu 3+ ions with the Nernstian slope of 21.1 (±0.3) mV decade −1 over a wide linear concentration range of 1.0×10 −6 –1.0×10 −1 mol L −1 . The electrode has fast response time (<15 s) and long term stability (about one month).