RT journal article T1 Fast Determination of Phenolic Compounds in Rice Grains by Ultraperformance Liquid Chromatography Coupled to Photodiode Array Detection: Method Development and Validation A1 Setyaningsih, Widiastuti A1 Sapruto, Irfan E. A1 Carrera Fernández, Ceferino Adrián A1 Palma Lovillo, Miguel A1 García Barroso, Carmelo A2 Química Analítica K1 Phenolic compounds K1 Rice grains K1 Box−Behnken design K1 UPLC−PDA K1 desirability function AB There are several phenolic compounds in rice grains providing benefits for human health. The concentration of phenolic compounds in rice is strongly affected by the polishing steps during rice production. A new sensitive ultraperformance liquid chromatography−ultraviolet−visible spectroscopy method with a photodiode array detection protocol has been developed and validated for the quantitation of phenolic compounds in rice grains. Several working variables and two different columns were evaluated. Finally, a less than 3 min analysis time was developed to achieve enough resolution for the simultaneous determination of the 20 most common phenolic compounds in rice. The analytical properties for the separation method produced an adequate sensitivity for all phenolic compounds in the regular range for phenolics in rice, 0.5−100 mg L−1 (R2 > 0.997), with high precisions for both repeatability and intermediate precisions (coefficients of variation less than 0.4 and 2.5% for the retention time and area of the peaks, respectively). PB 10.1021/ACS.JAFC.8B05430 SN 1520-5118 YR 2019 FD 2019 LK http://hdl.handle.net/10498/30359 UL http://hdl.handle.net/10498/30359 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 12-nov-2026