The mass data were collected in negative ionization mode
([MH]). The capillary voltage was 3.0 kV. Cone and desolvation
gas flow rates were set at 50 and 1000 l/h, respectively, and the
source and desolvation temperature was 150 C and 500 C,
respectively.
Samples used for analysis were purified water-soluble fractions
(1 mg/ml) and supplementary butanol extracts (1 mg/ml) from
white and gold sesame seeds. The injected sample was first separated
by UPLC and then MS of each peak was performed. To identify
detected compounds, we referred to MassBank (URL = ‘‘http://
www.massbank.jp’’), a database of mass spectral data, as well as
data about antioxidant compounds from sesame seeds reported
by Katsuzaki et al. (1994) and Moazzami, Andersson, and Kamal-
Eldin (2006).