Fig. 1From: Improved quantification of catechin and epicatechin in red rice (Oryza sativa L.) using stable isotope dilution liquid chromatography-mass spectrometryChromatograms and mass spectra of catechin, epicatechin, and SIL-IS (catechin-2,3,4-13C3 and epicatechin-2,3,4-13C3). A Selected ion chromatograms of catechin, epicatechin (m/z 291.1) and SIL-IS (m/z 294.1). Mass spectra of B catechin, epicatechin, and C SIL-IS. SIL-IS stable-isotope-labeled internal standardBack to article page