“…According to the available literature, virtually all mobile phases used for analysis of luteolin derivatives consisted either of ACN/H 2 O, e.g., [26,66,67,78] or, less often, MeOH/H 2 O mixtures [72,79,80,81]. Additionally, a modifier such as FA, e.g., [79,82,83,84], AcOH, e.g., [44,78,85,86,87], or trifluoroacetic acid (TFA) [88] was added to avoid peak tailing [89]. Analyses performed without acidic modifiers are rare [90].…”