Development and Validation of Low-Temperature Partitioning Extraction Methods for Multiresidue Determination of Pesticides in Soil and Surface Water
Year: 2026
Type: preprint
Abstract: Two complementary low-temperature partitioning methods were systematically optimized and validated for the multiresidue determination of five chemically diverse pesticides in soil and surface water by HPLC-UV. A 23 factorial design was used to evaluate the effects of extraction solvent volume, agitation time, and ionic strength on pesticide recovery. Acetonitrile volume was the primary factor, and the optimization established harmonized conditions for solid–liquid (SLE-LTP) and liquid–liquid (LLE-LTP) extraction: 6 mL acetonitrile, 1 min vortexing, and no salt addition. The simplified procedures reduced solvent consumption by 25–50% compared with selected previously reported methods, while achieving recoveries of 78–106% and relative standard deviations ≤13%. AGREEprep scores of 0.54 (SLE-LTP) and 0.53 (LLE-LTP) indicated comparable environmental performance. The applicability of both methods was further evaluated using real environmental samples, demonstrating the feasibility of harmonizing sample preparation across distinct matrices while maintaining satisfactory analytical performance.
Source: ChemRxiv
Language: English
Subfield: Food Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7222993248