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  • Title: Persistence of fipronil and its metabolites in soil under field conditions.
    Author: Saini S, Rani M, Kumari B.
    Journal: Environ Monit Assess; 2014 Jan; 186(1):69-75. PubMed ID: 23900635.
    Abstract:
    Fipronil belongs to phenylpyrazole class of chemical compounds. Degradation of fipronil in sandy loam soil was investigated under field conditions by applying fipronil (Regent 5 % SC) at 50 (T 1) and 100 g a.i. ha(-1) (T 2) in field. Samples were drawn periodically in triplicate on 0 (1 h after treatment), 1, 3, 7, 10, 15, 30, 60, and 90 days after treatment and analyzed on GC-ECD system equipped with capillary column. The residues of fipronil in both the doses dissipated in the range of 93.33-100 % in 90 days. Limit of detection (LOD) and limit of determination (LODe/LOQ) were 0.0003 and 0.001 mg kg(-1), respectively. Dissipation followed a biphasic first-order kinetics with half-life values of 10.81 and 9.97 days for fipronil alone and 8.14 and 13.05 days for fipronil along with metabolites in soil at (T 1) and (T 2) treatments, respectively.
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