HPLC profiling of flatulence and non-flatulence saccharides in eleven ricebean ( Vigna umbellata ) varieties from North-East India

HPLC method was optimized for analysis eight flatulence and non-flatulence saccharides in 11 ricebean varieties using Spherisorb NH 2 chromatographic column within 20 min by isocratic mobile phase containing acetonitrile and water in ratio of 70:30 at flow rate of 1 mL/min. The glucose, sucrose, raffinose, stachyose, verbascose and ajugose content in these varieties ranged from 157.63–365.08, 202.61–997.74, 196.29–429.5, 692.7–1480.67, 47.66–130.36 and 0.27–8.82 mg/100 g, respectively. The total flatulence saccharides (FS) were range between 937.13 ± 44.31 (JCR-08-12) and 1944.55 ± 83.57 (JCR-08-32) mg/100 g. Among the total FS, the content of stachyose was found highest in all varieties than other FS. Principal component analysis (PCA) revealed that glucose, sucrose, raffinose, stachyose, verbascose, ajugose, and total FS contributed 50.03% variation among the varieties. The eleven varieties were classified into three groups based on saccharides content by PCA. The group-A (JCR-08-12) and group-B (JCR-08-7, JCR-08-16, JCR-50, JCR-13-11, JCR-13-13 and Nagadal ) had very low and low content of total FS, respectively.