“…It was later found that reducing agents, such as corticosteroids, phenols, and anilines, can react with radical intermediates of the light-producing pathway of various luminol systems and therefore influence the rate or efficiency of emission [54][55][56][57]. For post-column detection, the most common approach involves combining the column eluate stream with one solution containing luminol and base, and another containing hexacyanoferrate(III), but the order in which they are merged varies in different procedures [58][59][60][61][62]. A diverse range of other oxidants and catalysts (e.g., 1 2 , Cu(ll)/H 2 0 2 , Bro-, Co(II), and [Cu(HI0 6 ) 2 ]5-) has also been used in procedures based on signal enhancement or inhibition [63][64][65][66][67].…”