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Positive ion electrospray IM-MS drift time distributions of A-type and B-type procyanidins by degree of polymerization as well as by linkage type. A) procyanidin B1 (B-type dimer), m/z 601; B) procyanidin A1 (A-type dimer), m/z 599 C) procyanidin C1 (B-type trimer), m/z 889 D) peanut trimer B (A-type), m/z 885; E) cocoa tetramer D (B-type), m/z 1177; and F) peanut tetramer E (mixed type), m/z 1173. Each procyanidin signal is shown as the singly-charged sodium adduct.
