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3 to 3.0 ng L-1. The average recoveries were in the range of 92.9-113.6% and 86.0-99.3% for spiked water samples at 10 and 100 ng L-1 of each BFR. The intra- and inter-day relative standard deviations (n = 6) were less than 5.4% and 8.0%, respectively. The results demonstrated that the proposed method was highly sensitive, efficient and reliable for the determination of trace legacy and emerging BFRs in water samples.In this work, a sensitive, rapid, and matrix effect-free method for online simultaneous detection of benzimidazoles in