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Positive ion electrospray ion mobility drift time distributions based on degree of polymerization for a mixture of B-type procyanidins. A) epicatechin (monomer); B) procyanidin B1 (dimer); C) procyanidin C1 (trimer); D) cocoa tetramer D; and E) cocoa pentamer E. Note that these procyanidins were detected as sodium adducts, [M+Na]+.
