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  • Title: Dissipation and residues of bispyribac-sodium in rice and environment.
    Author: Zhang Q, Zhao Y, Fan S, Bai A, Li X, Pan C.
    Journal: Environ Monit Assess; 2013 Dec; 185(12):9743-9. PubMed ID: 23793538.
    Abstract:
    The dissipation and residues of bispyribac-sodium in rice cropping system were studied. Bispyribac-sodium residues were extracted by a simple analytical method based on QuEChERs and detected by LC-MS/MS. The limit of detection for bispyribac-sodium of this method was 0.375 × 10(-3) ng. The limit of quantification (LOQ) was 5.0 μg/kg for rice plant samples, 2.0 μg/kg for rice hull, 0.2 μg/kg for water, and 0.1 μg/kg for soil and husked rice samples. The average recoveries of bispyribac-sodium ranged from 74.7 to 108%, with relative standard deviations less than 13%. The half-lives of bispyribac-sodium in rice plant, water, and soil were in the range of 1.4-5.6 days. More than 90% of bispyribac-sodium residue dissipated within 5 days. The final residues of bispyribac-sodium in rice were all below LOQ at harvest time.
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