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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Microextraction by packed sorbent liquid chromatography with time-of-flight mass spectrometry of triazines employing a molecularly imprinted polymer

Full text
Author(s):
Andrade, Felipe Nascimento [1] ; Santos-Neto, Alvaro Jose [1] ; Lancas, Fernando Mauro [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF SEPARATION SCIENCE; v. 37, n. 21, p. 3150-3156, NOV 2014.
Web of Science Citations: 26
Abstract

Molecularly imprinted polymers for the determination of triazines were synthesized by precipitation using atrazine as template, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as crosslinker, and 2,2 `-azobisisobutrynitrile as initiator. The polymers were characterized by infrared spectroscopy and scanning electron microscopy and packed in a device for microextraction by packed sorbent aiming for the preconcentration/cleanup of herbicides, such as atrazine, simazine, simetryn, ametryn, and terbutryn in corn samples. Liquid chromatography coupled with time-of-flight mass spectrometry was used for the separation and determination of the herbicides. The selectivity coefficient of molecularly imprinted polymers was compared with that of nonimprinted polymer for the binary mixtures of atrazine/propanil and atrazine/picloram, and the values obtained were 15.6 and 2.96, respectively. The analytical curve ranged from 10 to 80 mu g/kg (r = 0.989) and the limits of detection and quantification in the corn matrices were 3.3 and 10 mu g/kg, respectively. Intra-and interday precisions were < 14.8% and accuracy was better than 90.9% for all herbicides. Polymer synthesis was successfully applied to the cleanup and preconcentration of triazines from fortified corn samples with 91.1-109.1% of recovery. (AU)

FAPESP's process: 11/09898-4 - Development of molecularly imprinted polymer and use for the sample preparation and analysis of triazine and sulfonylurea in maize using high performance liquid chromatography (HPLC).
Grantee:Felipe Nascimento Andrade
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 10/19910-9 - Development of green chemistry strategies on chromatography and application to the evaluation of antibiotics degradation in wastewaters by fixed-bed anaerobic bioreactors
Grantee:Alvaro José dos Santos Neto
Support Opportunities: Regular Research Grants