Premium
Voltammetric Determination of Nicotine at Poly(4‐Amino‐3‐Hydroxynaphthalene Sulfonic Acid)‐Modified Glassy Carbon Electrode
Author(s) -
Geto Alemnew,
Amare Maereg,
Tessema Merid,
Admassie Shimelis
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.201100653
Subject(s) - sulfonic acid , glassy carbon , detection limit , electrode , nicotine , calibration curve , voltammetry , cyclic voltammetry , chemistry , carbon black , carbon fibers , materials science , analytical chemistry (journal) , nuclear chemistry , electrochemistry , chromatography , organic chemistry , composite material , natural rubber , neuroscience , biology , composite number
A poly(4‐amino‐3‐hydroxynaphthalene sulfonic acid)‐modified glassy carbon electrode was developed for the voltammetric determination of nicotine. An oxidation signal at lower potential with higher current was obtained for nicotine at the polymer‐modified electrode compared to bare glassy carbon electrode suggesting the electrocatalytic effect of the polymer film. Under optimum conditions, square wave voltammetry of nicotine showed oxidation at +884 mV (vs. SCE) in phosphate buffer solution pH 7.5. The calibration curve was linear over the range 1.0 to 200.0 µM ( R 2 =0.9987) concentration of nicotine with a detection limit ( S / N =3) of 8.66×10 −7 mol L −1 . Application of the proposed method to cigarette tobacco samples gave acceptable recovery results of 90.7 % to 107.2 %.