By Eschmeier J., Putinar M.
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3. , Liu, Z. , (1999) Multi-stage Mass spectrometric studies of triterpenoid saponins in crude extracts from Acanthopanax senticosus Harms, Rapid Communications in Mass Spectrometry 13, 873-879. 4. , Lolla, E. , (1997) Liquid chromatography-thermospray mass spectrometry analysis of B-escin, Fitoterapia 68, 520-526. 5. , Ohtani, K. , (1990) Saponins from bran of quinoa Chenopodium quinoa Willd. , Chemical and Pharmaceutical Bulletin 38,375-377. 6. , Ohtani, K. , (1988) Saponins from bran of quinoa, Chenopodium quinoa Willd.
Price, K. , Eagles, I. and Fenwick, G. R (1988) Saponin concentration of 13 varieties oflegume seed using fast atom bombardment mass spectrometry. J. Sci. Food Agric. 42, 183-193. Oleszek, W. A. ) seedlings. J. Agric. Food Chem. 46, 960-962. , Pace, R, Papeo, G. and Peterlongo, F. (1997) Identification of soy asapon ins by liquid chromatography-thermospray mass spectrometry. J. Chromatography A 777, 233-238. Liu, Z. and Iia, Z. (1995) Triterpenoid saponins from Clinopodium chinensis. J. Natural Products 58, 184188.
Figure 5 shows a mixed FAB negative ion spectra for saponins from a crude peanut meal extract analyzed by HPLC-MS. Ions at mlz 911,941, and 957 shown in the expanded spectra insert in Figure 5 represent the molecular ions minus a hydrogen of Soyasaponin 11, I, and V respectively. Common fragment ions for all three monodesmodic saponins are found at mlz 632, and 634. All three of these saponins eluted together from the C8 reverse phase columns. TABLE 2. Major ions found in mixed FAB mass spectra and normalized intensities for Soyasaponin I, 11, and V Ion Soyasaponin I M-(d+h+u+w) M-(d+h+u) A Saccharide M-(d+h) M-(d) M-(P) M-(h) M-(d) M-H Soyasaponin 11 439 (20) 457 (22) 439 (20) 457 (22) 633 (32) 633 (32) Soyasaponin V 439 (20) 457 (22) 499(23) 633 (32) 780(21) 795 (41) 796(50) 941(100) 911 (29) 957 (27) [M - H] loss from molecular ion; d - deoxyhexose; p - pentose; h - hexose; u - glucuronic acid; w - water.