STUDY OF MATRIX EFFECT IN PESTICIDE ANALYSIS BY GAS CHROMATOGRAPHY

  • Diego A. AHUMADA F. Grupo de residualidad y destino ambiental de plaguicidas en sistemas agrícolas. Departamento de Química. Facultad de Ciencias. Universidad Nacional
  • Jairo A. GUERRERO D. Grupo de residualidad y destino ambiental de plaguicidas en sistemas agrícolas. Departamento de Química. Facultad de Ciencias. Universidad Nacional
Keywords: matrix, pesticides, gas chromatography.

Abstract

In order to study the matrix-induced chromatographic response enhancement (matrix effect), we select
three different types of biotic matrices (Lactuca sativa L., Physalis peruviana L. and Solanum tuberosum)
and a group of pesticides of different physicochemical characteristics including organochlorine,
organophosphorus and pyrethroids pesticides. These pesticides are determined by gas chromatography
by electronic microcapture detector (μECD) and nitrogen-phosphorus detector (NPD), coupled in
parallel. This study evaluates the matrix effect by analysis of covariance and linear regression. There are
nearly 75% of the studied pesticides which have variations in the chromatographic response compared to
solvent signals. Furthermore, we notice that the nature of the matrix affect the chromatographic response
of 18 of the 33 pesticides and the amount of matrix injected affects the response of only 13 pesticides.
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Published
2010-03-26
How to Cite
AHUMADA F. D. A., & GUERRERO D. J. A. (2010). STUDY OF MATRIX EFFECT IN PESTICIDE ANALYSIS BY GAS CHROMATOGRAPHY. Vitae, 17(1), 51-58. Retrieved from https://revistas.udea.edu.co/index.php/vitae/article/view/4974
Section
Pharmacology and Toxicology