Quantitative analysis of synthetic pesticide residues in soil samples from a brinjal field using high-performance liquid chromatography

An experiment was conducted at the main Agricultural Research Field of Lovely Professional University in Phagwara, Punjab, from July 2023 to 2024 to analyze the residues of synthetic insecticides in soil samples from a brinjal field using high-performance liquid chromatography (HPLC). The treatment consists of synthetic pesticides applied at recommended dosages: T0: Control (water-spray), T1: Cartap-hydrochloride (50% SP) at 500 g a.i. ha-1, T2: Chlorpyrifos (20% EC) at 200 g a.i. ha-1, T3: Deltamethrin (2.8% EC) at 15 g a.i. ha-1. The results were compared to the FAO and EU maximum residue limits (MRL). The findings indicated that T1 showed the highest initial deposit (1.15 mg/kg), followed by T2 (0.62 mg/kg). The percent dissipation rates were 91.08%, 79.60%, and 76.46% on the seventh, fifth, and third days after applying T1, T2, and T3, respectively. The degradation of different insecticidal treatment residues was observed between three to seven days after application. The results concluded that the residues of these synthetic insecticides dissipated quickly, leaving no detectable traces in soil.