Abstract
Matrix effects observed during the multiresidue analysis of seven organochlorine pesticides in six different agricultural products with GC-ECD were assessed. The presence of matrix coextractives, a major cause of observed matrix effects, directly and/or indirectly influenced the chromatographic responses of some pesticides. Two types of external calibrations, solvent calibration (SC) and matrixmatched calibration (MC), were used to assess matrix effects. Greater matrix effects were observed at the lower concentrations of each pesticide. The extent of matrix effects varied unpredictably with matrix type. Among the analyzed pesticides, iprodione, cyhalothrin, and cypermethrin exhibited greater matrix effects (>150%) for almost all matrices. The pesticide recovery rates obtained with MC were not statistically different from a 100% recovery rate in most samples, which indicates that MC may diminish the overestimates occurred due to matrix effects in GC analysis.
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Kim, NH., Lee, JS., Park, KA. et al. Determination of matrix effects occurred during the analysis of organochlorine pesticides in agricultural products using GC-ECD. Food Sci Biotechnol 25, 33–40 (2016). https://doi.org/10.1007/s10068-016-0005-y
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DOI: https://doi.org/10.1007/s10068-016-0005-y