. The optimized method presented a linear response in the range from 0.77 to 100.0 μmol L−1, with analytical sensitivity of 7.7 × 103 L mol−1, a coefficient of determination of 0.999, and a limit of detection of 0.23 μmol L−1. Themethodwas applied using samples fortified at different concentration levels, and the recoveries achieved were between 97.0 and 104.9%.