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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Determination of trace levels of triazines in corn matrices by bar adsorptive microextraction with a molecularly imprinted polymer

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Autor(es):
Andrade, Felipe Nascimento [1] ; Ide, Alessandra Honjo [2] ; Neng, Nuno da Rosa [2] ; Lancas, Fernando Mauro [1] ; Florencio Nogueira, Jose Manuel [2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Chem Sao Carlos, Sao Carlos, SP - Brazil
[2] Univ Lisbon, Fac Ciencias, Ctr Quim & Bioquim, P-1699 Lisbon - Portugal
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF SEPARATION SCIENCE; v. 39, n. 4, SI, p. 756-761, FEB 2016.
Citações Web of Science: 9
Resumo

This manuscript addresses the determination of triazines (ametryn, atrazine, simazine, and terbutryn) in corn matrices using bar adsorptive microextraction coated with a selective molecularly imprinted polymer phase following microliquid desorption and high-performance liquid chromatography with diode array detection. The molecularly imprinted polymer was synthesized using atrazine as a template and methacrylic acid as a functional monomer. Assays performed in 25 mL of ultrapure water samples spiked at 8.0 mu g/L yielded 80-120 % recoveries under the evaluated experimental conditions. The method showed an accuracy (0.2 < bias < 17.9%), precision (relative standard deviation < 17.4%), convenient detection (0.2 mu g/L), and quantification (0.7 mu g/L) limits, as well as linear dynamic ranges (0.8-24.0 mu g/L) with remarkable determination coefficients (R-2 > 0.9926). The proposed analytical method was applied to monitor triazines in three types of corn matrices using the standard addition methodology. Experiments performed in corn samples spiked with triazines at the trace level (8.0 mu g/kg of each analyte) gave rise to recoveries (81.0-119.4%) with good reproducibility and robustness. The proposed methodology is also easy to implement and showed to be a good analytical alternative to monitor triazines in complex matrices, when compared with other sorption-based microextraction techniques. (AU)

Processo FAPESP: 14/20424-2 - Desenvolvimento de polímeros molecularmente impressos empregando a microextração adsortiva em barra para análise de triazinas e sulfoniluréias utilizando cromatografia líquida de alta eficiência (HPLC)
Beneficiário:Felipe Nascimento Andrade
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
Processo FAPESP: 11/09898-4 - Desenvolvimento de polímeros molecularmente impressos e seu uso para o preparo de amostras e análise de triazinas e sulfoniluréias em milho utilizando cromatografia líquida de alta eficiência (HPLC)
Beneficiário:Felipe Nascimento Andrade
Linha de fomento: Bolsas no Brasil - Doutorado