Table 1: The main molecular mass range, corresponding compounds, and m/z values observed from negative ion experiments with HPLC-TOF-MS for eGCE and GCE and tannic acid.
Extracts
Main molecular mass range [M-H]-
Corresponding Compoundsa
Main m/z valuesb
GCE
169- 635
GA, 1-3GGs
169,331, 483, 635
eGCE
169-1243
GA, 4-7GGs
169, 787, 939, 1091, 1243
Tannic acid
939-1699
5-10GGs
939, 1091, 1243, 1395, 1547, 1699
a 1-10GGs represented galloylglucopyranose, di-galloylglucopyranose, tri-galloylglucopyranose, tetra-galloylglucopyranose, penta-galloylglucopyranose, hexa-galloylglucopyranose, hepta-galloylglucopyranose, octa-galloylglucopyranose, ennea-galloylglucopyranose, deca-galloylglucopyranose, respectively [16, 24-26].
b 169, 331, 483, 635, 787, 939, 1091, 1243, 1395, 1547, and 1699 would match with the [M-H]- ions of gallic acid, 1-10GGs, respectively.