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Analytical curves presented regression coefficients values above 0.9908 for a concentration range from 0.005 to 0.6 μg g-1. Limits of detection (LOD) from 0.002 to 0.006 μg g-1 and limits of quantification (LOQ) from 0.006 to 0.020 μg g-1 were reached for all analytes. This method can be used to monitor and quantify fipronil and its intermediates in soil.Polypyrrole (PPy) is a polymer widely used as an extraction phase due to its ability to perform intermolecular interactions with the analyte, such as acid-base, π-π, dipole-dipole, hyd