Selective and Sensitive Quantification of Acetochlor and S-Metolachlor in Maize and Soybean Plant Samples by Gas Chromatography-Tandem Mass Spectrometry

Herbicide residue analysis has gained importance worldwide, mainly for food quality control to minimize potentially adverse impacts on human health. A Gas chromatography-tandem mass spectrometry (GC-MS) method quantitative of acetochlor and s-metolachlor in maize soybean straw been developed, validated applied analyze the residues anilide herbicides. Straw material was dried, homogenized extracted with a mixture n-hexane acetone by an accelerated solvent extraction method. Chromatographic separation target analytes performed Agilent 7832 GC equipped spectrometer detector, split-splitless injector HP-5 MS (5% phenylmethyl siloxane) capillary column (30 m × 0.25 mm µm). Under these parameters, limit detection (LOD) values were 0.2 ng g−1 0.07 s-metolachlor, average recoveries between 86% 119.7%. The at 0.5 0.01 mg kg −1. Furthermore, final two herbicides below maximum (MRL) harvest time. proposed is suitable routine analysis.