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Development of Electrochemical Platform Based on Molecularly Imprinted Poly(methacrylic acid) Grafted on Iniferter‐modified Carbon Nanotubes for 17β‐Estradiol Determination in Water Samples
Author(s) -
Marques Gabriel Lopes,
Rocha Luana Rianne,
Prete Maiyara Carolyne,
Gorla Felipe Augusto,
Moscardi dos Santos Dayana,
Segatelli Mariana Gava,
Teixeira Tarley César Ricardo
Publication year - 2021
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.202060270
Subject(s) - differential pulse voltammetry , molecularly imprinted polymer , detection limit , carbon nanotube , methacrylic acid , electrochemistry , materials science , electrochemical gas sensor , cyclic voltammetry , glassy carbon , poly(methacrylic acid) , voltammetry , nuclear chemistry , chemical engineering , chemistry , selectivity , electrode , polymer , chromatography , nanotechnology , organic chemistry , copolymer , catalysis , composite material , engineering
This paper describes the development of a new electrochemical sensor for 17β‐estradiol (E2) determination based on glassy carbon electrode (GCE) modified with molecularly imprinted polymer grafted onto iniferter‐multiwall carbon nanotubes surface (MIP‐MWCNT) and dihexadecyl‐hydrogen‐phosphate (DHP). The electrochemical method was based on closed‐circuit preconcentration of E2 in 0.1 mol L −1 phosphate buffer (pH 7.0) during 500 s. Upon preconcentration, E2 was determined by differential pulse voltammetry (DPV) exhibiting a limit of detection of 0.01 μmol L −1 . The sensor exhibited higher selectivity toward E2 and it was applied for E2 determination in natural water samples, with accuracy attested by HPLC‐DAD.