Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/24795
Tipo: Artigo
Título: Influência dos constituintes químicos dos extratos de diferentes matrizes na resposta cromatográfica de agrotóxicos
Autor(es): Neves, Antônio Augusto
Queiroz, Maria Eliana L. R.
Starling, Maria Antônia V. M.
Pinho, Gevany Paulino de
Silvério, Flaviano Oliveira
Abstract: Multiresidue methods for pesticides monitoring by GC are commonly employed, however, it is well known that the presence of compounds of the matrix introduces errors during the quantiûcation. The main consequence of matrix effect is an increasing or decreasing analyte signal after the GC saturation with extracts of matrix. In this paper, the influence of constituents of nine matrices on the quantification of the four pesticides by GC-ECD was studied. Variation of signal was evaluated by PCA and HCA, and results showed that the constituents of tomato increased the signal (until 300%), while extracts of apple decreased (until -20%). Variation the analyte signal in the presence of the matrix in respect to the same analyte in solvent (standard solution) also was observed, mainly for liver extract (until 270%).
Palavras-chave: Matrix effect
Pesticides
PCA
Editor: Química Nova
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1590/S0100-40422010000400028
http://www.locus.ufv.br/handle/123456789/24795
Data do documento: 2010
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