Multiresidue Analysis of Pesticides in Agricultural Products by GC-ECD after GPC and Graphitized Carbon Column Cleanup

Abstract

A multiresidue method that enables determination of many pesticides in agricultural products by GC-ECD was studied. First, 63 pesticides were selected as agrochemicals commonly used in crop protection in this country, and/or found in agricultural products over the past 6 years (April 1996ῌMarch 2002) in Aichi Prefecture. A sample was extracted with acetonitrile and the acetonitrile layer was separated by salting-out. The extract was purified on a GPC system with a graphitized carbon columns, and then by a Florisil mini-column fractionation. The test solution was subjected to one-injection, dual-column GC with dual ECD (column: Stx-CLPesticides and Stx-CLPesticides2). The detection limits of the pesticides were in a suitable range (0.0001ῌ0.01 mg/ g) for monitoring pesticide residues in agricultural products. The method was applied to 203 commercial agricultural products to demonstrate its suitability for routine analysis.

Rapid and Easy Multiresidue Method for Determination of Pesticide Residues in Foods Using Gas or Liquid Chromatography–Tandem Mass Spectrometry

“…Thus, analytical institutes require fast and efficient multiresidue methods in order to maximize the coverage of their monitoring activities. For this reason, researchers have reported many multiresidue analytical methods (Cook, J., et al, 1999, Fillion, J., et al, 2000, Hirahara, Y., et al, 2006, Luke, M. A., et al, 1975, Ueno, E., et al, 2004. These methods were optimized to monitor multiple residues efficiently and are used routinely in quarantine stations and laboratories.…”

Development and diffusion of a systematic method for determining multiple pesticide residues in agricultural products

“…24,27,28) Grapefruit was produced by natural crossing pomelo and orange, so it is necessary to note that similar interfering peaks appear over the entire product ions produced from the protonated molecule of imazalil on the chromatograms of the test solution of pomelo by LC conditions. In addition to the MS/MS system, EI-SIM/Scan mode GC-MS, 9) negative chemical ionization (NCI)-SIM/Scan mode GC-MS, 17) dual-column GC-ECD/ECD, 3,11) dual-column GC-FPD/NPD, [4][5][6] ESI-SIM/Scan mode LC-MS with diode-array detection (DAD), 13,14) and HPLC with post-column FLD for residual N-methyl carbamate pesticides, 24,29) were also adopted. Thus, the systematic method using plural separation and detection systems has been constructed.…”

Residualidad de fitosanitarios en tomate y uchuva cultivados en Quindío (Colombia)

“…Esta técnica cuenta con detectores como el detector de captura de electrones y el detector de nitrógeno y fósforo, entre otros (Hunter, Riederer, & Ryan, 2010;Ueno, Oshima, Saito, & Matsumoto, 2003;Ueno et al, 2004). Hasta la fecha se han desarrollado numerosos métodos de análisis para la determinación de plaguicidas OF y OC en distintas solanáceas mediante la cromatografía de gases y diferentes detectores.…”