Open AccessModification of Multiwalled Carbon Nanotubes by Dipyridile Amine for Potentiometric Determination of Lead(II) Ions in Environmental Samples
Author(s) -
Hamid Reza Lotfi Zadeh Zhad,
Forouzan Aboufazeli,
Vahid Amani,
Ezzatollah Najafi,
Omid Sadeghi
Publication year - 2012
Publication title -
journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.436
H-Index - 50
eISSN - 2090-9063
pISSN - 2090-9071
DOI - 10.1155/2013/414375
Subject(s) - chemistry , amine gas treating , detection limit , potentiometric titration , electrode , ion , carbon fibers , carbon paste electrode , graphite , trace amounts , inorganic chemistry , potentiometric sensor , ion selective electrode , nuclear chemistry , analytical chemistry (journal) , electrochemistry , environmental chemistry , chromatography , organic chemistry , cyclic voltammetry , catalysis , selectivity , composite number , medicine , materials science , alternative medicine , pathology , composite material
A carbon paste electrode was modified by dipyridile amine functionalized multiwalled carbon nanotubes for determination of trace amounts of lead(II) ions. The electrode composition was graphite powder 70%, paraffin 23%, and dipyridile amine modified MWCNTs 7% (W/W). The linear range for lead(II) was 9.5 × 10−8 to 2.5 × 10−3 mol L−1, and the limit of detection was obtained 7.0 × 10−8 mol L−1. The lifetime of the electrode was ten weeks, and a fast response time was observed. The electrode was used for determination of trace amounts of Pb(II) ions in real samples and standard reference materials of water, soil, and plant
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