Bispyribac-sodium is a commonly used herbicide. An analytical method employing HPLC with a diode array detector was developed to determine bispyribac-sodium residues in rice. The liquid–liquid partition and anion exchange solid phase procedures that were developed provide effective extraction and cleanup methods for analysis feasibility. Recoveries ranged from 83.98 to 98.51% with a relative standard deviation of .56–6.36% and sensitivity of .1 mg/kg. Bispyribac-sodium residues in rice were further confirmed by LC–MS. The proposed method was successfully applied to the analysis of bispyribac-sodium residues from a rice field in Jiangxi Province that had been treated using bispyribac-sodium.
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