Organic-Solvent-Free Extraction Method for Determination of Carbamate and Carbamoyloxime Pesticides in Soil and Sediment Samples

摘要

This study evaluated the usefulness of monochloroacetic acid buffer (MCAAB) for extracting several carbamate/carbamoyloxime pesticides from a silt-loam soil and sediment, and an organic clay soil. The MCAAB extraction method, relative to acetonitrile and methanol extractants, was more accurate and precise for extraction of aldicarb, aldicarb sulfoxide, aldicarb sulfone, oxamyl, methomyl, carbofuran, 3-hydroxy-carbofuran, and propoxur; with recoveries ranging from 78.8% to 121.1%. Recoveries of carbaryl and methiocarb ranged from 0% to 64.1%. The MCCAB extraction method did not perform well for extraction of most compounds from the organic-clay soil, with recoveries ranging from 0% to 66.7%. Keywords MCAAB - Monochloroacetic acid - Organic-clay - Silt-loam