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(a) Total ion chromatogram (TIC) of CRP in the positive mode. (b) TIC of mixed standard solution in the positive mode. Peaks 3, 9, 11, 12, and 14 are hesperidin, nobiletin, 3,5,6,7,8,3′,4′-heptamethoxyflavone, tangeretin, and 5-hydroxy-6,7,8,3′,4′-pentamethoxyflavone, respectively.
