STUDY OF MATRIX EFFECT IN PESTICIDE ANALYSIS BY GAS CHROMATOGRAPHY
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 organochlori...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Universidad de Antioquia
2010
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/e3946c873ec04991965bcf10c72f2793 |
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| Sumario: | 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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