Recent Applications of Mass Spectrometry in the Study of Grape and Wine Polyphenols

Table 17

Main PAs identified in the MALDI-TOF positive-ion spectra of seeds extracts of 35 hybrid and V. vinifera grape varieties. Signals were divided in A and B series in reference to the interflavanic bond type: series B only B-type interflavanic bonds, and also A-type bonds are included in series A. Signals of sodium and protonated ions are reported. G: galloyl ester.

Procyanidin	Series B		Series A
	[M + H]^+	[M + Na]^+	[M + H]^+	[M + Na]^+
Dimer A-type			577
Dimer B-type		601
Dimer, 1G		753
Trimer	867			863, 865
Trimer		889		887
Dimer, 2G		905		903
Trimer, 1G		1041		1039
Tetramer		1177		1175
Trimer, 2G		1193		1191
Tetramer, 1G	1305	1329	1303	1327
Trimer, 3G		1345		1343
Pentamer		1465		1463
Tetramer, 2G		1481		1629, 1631
Pentamer, 1G		1617		1613, 1615
Tetramer, 3G		1633		1629, 1631
Hexamer		1753		1751
Pentamer, 2G		1769		1765, 1767
Tetramer, 4G		1785		1781, 1783
Hexamer, 1G		1905		1903
Pentamer, 3G		1921		1917, 1919
Heptamer		2041
Hexamer, 2G		2057		2053, 2055
Pentamer, 4G		2073		2069, 2071
Heptamer, 1G		2193		2189, 2191
Hexamer, 3G		2209		2205, 2207
Pentamer, 5G		2225		2221, 2223
Heptamer, 2G		2345		2341, 2343
Hexamer, 4G		2361		2357, 2359
Heptamer, 3G		2497		2495
Hexamer, 5G		2513		2511
Octamer, 2G		2633		2631
Heptamer, 4G		2649		2647
Hexamer, 6G		2665		2663
Octamer, 3G		2785		2783
Heptamer 5G		2802
Nonamer, 2G		2922		2919
Octamer, 4G		2937		2935
Heptamer, 6G		2953		2951
Nonamer, 3G		3073		3071
Octamer, 5G		3089		3087
Decamer, 2G		3209		3207
Nonamer, 4G		3225		3223
Octamer, 6G		3241
Decamer, 3G		3361
Nonamer, 5G		3377		3376
Undecamer, 2G		3496