Open AccessUltrastable method for determination of folic acid based on polyneutral red and multiwalled carbon nanotubes composite nanofilm
Author(s) -
Qu Jianying,
Du Xueping,
Lou Tongfang,
Dong Ying,
Shi Lijuan
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0645
Subject(s) - materials science , electrode , composite number , detection limit , folic acid , carbon nanotube , fabrication , nanomaterials , chemical engineering , electrocatalyst , carbon fibers , linear range , composite film , nanotechnology , glassy carbon , inorganic chemistry , electrochemistry , composite material , chromatography , chemistry , cyclic voltammetry , medicine , engineering , alternative medicine , pathology
By using the electrocatalytic property of the nanomaterials and the molecular recognition characteristic of neutral red (NR), a new modified electrode was fabricated by electropolymerising the NR onto the surface of the multiwalled carbon nanotubes modified glassy carbon electrode, which exhibited a good electrocatalytic activity for folic acid (FA). The results of experiments showed that a good linear relationship between the reductive peak current of FA and its concentration was in the range of 6.25 × 10 −7 –5.00 × 10 −5 mol/l with a detection limit of 1.37 × 10 −7 mol/l in the optimal conditions. The recovery ratio was in the range of 99.3 ∼ 103.2%. The composite film modified electrode exhibited an excellent stability with a simple fabrication, which established a solid foundation for the practical applications.