Synthesis and characterization of magnetic-molecularly imprinted polymers for the HPLC-UV analysis of ametryn

Khan, Sabir [UNESP]; Hussain, Sajjad; Wong, Ademar [UNESP]; Foguel, Marcos Vinicius [UNESP]; Moreira Gonçalves, Luís; Pividori Gurgo, Maria Isabel; Taboada Sotomayor, Maria del Pilar [UNESP]

Synthesis and characterization of magnetic-molecularly imprinted polymers for the HPLC-UV analysis of ametryn

Arquivos

2-s2.0-85034787687.pdf (1.12 MB)

Data

2018-01-01

Autores

Khan, Sabir

Hussain, Sajjad

Wong, Ademar

Foguel, Marcos Vinicius

Moreira Gonçalves, Luís

Pividori Gurgo, Maria Isabel

Taboada Sotomayor, Maria del Pilar

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

Magnetic molecularly imprinted polymer (mag-MIP) were developed for the analysis of ametryn (4-N-ethyl-6-methylsulfanyl-2-N-propan-2-yl-1,3,5-triazine-2,4-diamine), a popular triazine herbicide. Iron oxide (Fe3O4) nanoparticles were synthetized, and then modified with tetraethoxysilane (TEOS) and 3-mercaptopropyltrimethoxysilane (MPS). Then MIPs’ polymerimerization occurred in the nanoparticles’ surface, using ethylene-glycol-dimethacrylate (EGDMA) as the building monomer, 2,2′-azobis(2-methylpropionitrile) (AIBN) as the radical initiator, and 2-vinylpyridine as the functional monomer. The functional monomer was previously chosen by computational simulation. The mag-MIPs’ adsorption behavior well-fitted a Langmuir model (qm of 8.6 mg g− 1, KL of 5.2 L mg− 1) and pseudo first order kinetics (k1 of 2.5 × 10− 4 s− 1). The developed analytical methodology, using high-performance liquid chromatography with UV detection (HPLC-UV), showed suitable selectivity and had a limit of detection (LOD) and quantification (LOQ) of 25 and 82 nmol L− 1, respectively.