Efeito de matriz na quantificação de agrotóxicos por cromatografia gasosa

Química Nova

Gevany P. Pinho²  Antônio A. Neves¹  Maria Eliana L. R. Queiroz¹  Flaviano O. Silvério¹ 

[1] ,Universidade Federal de ViçosaRio Parnaíba MG ,Brasil

关键词: matrix effect;    pesticides;    gas chromatography;   

DOI  :  10.1590/S0100-40422009000400030

来源: SciELO

【 摘 要 】

The lack of accuracy of a chromatographic method can be associated with the matrix effect. This effect is observed in pesticide quantification by gas chromatography when the chromatographic signals of standards prepared in solvents are compared with those of the analyte in extracts of complex matrices. In the competition between the matrix components and the pesticides for the active sites of the liner, a larger amount of pesticides is transferred to the column, giving apparent extractions above 100%. In this work, we discuss factors that contribute to the matrix effect and present some attempts to overcome the problem.

【 授权许可】

CC BY-NC   
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